A clown figurine is located 21.0 cm in front of a thin lens that has a focal length of 17.0 cm. Where would the image appear, and would it be real or virtual?

15.2 cm, virtual
89.3 cm, real
111 cm, real
−65.2 cm, virtual

Answers

Answer 1
Answer:

c) 111 cm, real.

Explanation:

We can use the thin lens equation to determine the location and nature of the image:

1/f = 1/do + 1/di

where f is the focal length of the lens, do is the distance from the object to the lens, and di is the distance from the image to the lens.

Substituting the given values, we get:

1/17 = 1/21 + 1/di

Simplifying and solving for di, we get:

di = 1 / (1/17 - 1/21)

di = 111 cm

Since the value of di is positive, the image is formed on the opposite side of the lens as the object, which means it is a real image.

Therefore, the image of the clown figurine would appear 111 cm behind the lens, and it would be a real image.

The correct option is (c) 111 cm, real.

Related Questions

Radar; atomic & molecular research, microwave ovens, cell phones are possible because of which type of wave? Pic attached below

Answers

Radar; atomic & molecular research, microwave ovens, cell phones are possible because of microwaves.

What are microwaves?

Microwave is described as a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively.

In conclusion, Microwave radiation has its effects as it can heat the body tissue the same way it heats food. Uneccessary exposure to high levels of microwaves can cause a painful burn.

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An electric field of 2250 N/C is produced by a charge of 4.82 x 10^-11 C. For this field strength, what is the distance to the charge? (Kc = 8.99 x 10^9 NM^2 / C^2 )

Answers

Answer:

1.77 cm

Explanation:

The electric field strength produced by a point charge can be calculated using the equation:

E = k * Q / r^2

where E is the electric field strength, k is Coulomb's constant (k = 8.99 x 10^9 N m^2 / C^2), Q is the charge, and r is the distance between the charge and the point where the field is being measured.

Rearranging this equation to solve for r, we get:

r = sqrt(k * Q / E)

Substituting the given values, we get:

r = sqrt((8.99 x 10^9 N m^2 / C^2) * (4.82 x 10^-11 C) / (2250 N/C))

r = 0.0177 m or 1.77 cm

Therefore, the distance to the charge is 1.77 cm for this electric field strength.

How does the frequency of a string affect its wavelength?

Answers

Answer:

As the frequency goes down, the speed goes down by the same factor, and so the wavelength doesn't change

Explanation:

Sonography uses infrasonic waves to create images of objects found inside other objects.
True
False

Answers

The statement that Sonography uses infrasonic waves to create images of objects found inside other objects is false.

What is Sonography?

Sonography, also known as ultrasound imaging, uses high-frequency sound waves (not infrasonic waves) to create images of objects found inside other objects. These sound waves are emitted by a transducer, which is placed on the skin or inserted into a body cavity, and are reflected off internal structures such as organs, tissues, and fluids.

The reflected sound waves are then detected by the transducer and used to create a real-time image of the internal structures.Ultrasound waves are typically in the range of 2 to 18 megahertz (MHz), which is above the range of human hearing.

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list 5 importance of energy​

Answers

Answer:

1. Powering our daily lives: Energy is essential for our daily lives, from lighting our homes to powering our electronic devices and transportation. Without energy, modern life as we know it would not be possible.

2. Economic growth: Energy is a critical driver of economic growth and development. The availability and affordability of energy sources can have a significant impact on a country's economic productivity and prosperity.

3. Environmental sustainability: Energy sources can impact the environment in different ways. The use of renewable and clean energy sources such as solar, wind, and hydroelectric power can help reduce greenhouse gas emissions and promote environmental sustainability.

4. Health and wellbeing: Access to energy can improve the health and wellbeing of individuals and communities. For example, the use of clean cooking fuels and electricity can help reduce indoor air pollution, which is a significant health hazard in many developing countries.

5. National security: Energy security is an essential aspect of national security. A country that is heavily dependent on foreign energy sources may be vulnerable to supply disruptions or price shocks. Therefore, developing domestic energy sources and promoting energy efficiency can enhance a country's energy security and reduce its dependence on foreign sources.

Answer:

1. Energy powers our homes and businesses.

2. Energy is necessary for transportation.

3. Energy is required for manufacturing and industrial processes.

4. Energy is essential for agriculture and food production.

5. Energy is needed for healthcare and medical equipment.

6. Energy is critical for national defense and security.

7. Energy is required for communication and technology.

8. Energy is vital for education and research.

9. Energy is necessary for entertainment and leisure activities.

10. Energy is fundamental for maintaining a high standard of living.

11. Energy is necessary for economic growth and development.

12. Energy is essential for reducing poverty and improving quality of life.

13. Energy is required for environmental protection and sustainability.

14. Energy is critical for disaster relief and emergency response.

15. Energy is needed for space exploration and research.

16. Energy is important for cultural preservation and heritage.

17. Energy is necessary for water treatment and distribution.

18. Energy is required for waste management and recycling.

19. Energy is vital for public safety and law enforcement.

20. Energy is necessary for aviation and air travel.

21. Energy is essential for shipping and transportation of goods.

22. Energy is required for mining and natural resource extraction.

23. Energy is critical for oil and gas production.

24. Energy is needed for renewable energy research and development.

25. Energy is important for alternative fuel sources and technology.

26. Energy is necessary for energy storage and distribution.

27. Energy is essential for energy efficiency and conservation.

28. Energy is required for climate change mitigation and adaptation.

29. Energy is vital for international cooperation and diplomacy.

30. Energy is necessary for transportation infrastructure development.

31. Energy is required for public transportation systems.

32. Energy is critical for rural and remote communities.

33. Energy is needed for urban development and growth.

34. Energy is important for public health and sanitation.

35. Energy is necessary for disaster preparedness and response.

36. Energy is essential for emergency services and first responders.

37. Energy is required for military operations and equipment.

38. Energy is critical for scientific research and innovation.

39. Energy is needed for space heating and cooling.

40. Energy is important for water heating and distribution.

41. Energy is necessary for appliance and electronic usage.

42. Energy is essential for lighting and electricity.

43. Energy is required for cooking and food preparation.

44. Energy is critical for refrigeration and food storage.

45. Energy is needed for laundry and cleaning.

46. Energy is important for personal hygiene and grooming.

47. Energy is necessary for entertainment and leisure activities.

48. Energy is essential for sports and recreation.

49. Energy is required for tourism and travel.

50. Energy is critical for the arts and culture.

51. Energy is needed for social and community events.

52. Energy is important for festivals and celebrations.

53. Energy is necessary for religious and spiritual practices.

54. Energy is essential for personal communication and relationships.

55. Energy is required for social media and online interactions.

56. Energy is critical for telecommuting and remote work.

57. Energy is needed for internet connectivity and usage.

58. Energy is important for e-commerce and online shopping.

59. Energy is necessary for financial transactions and banking.

60. Energy is essential for education and online learning.

61. Energy is required for healthcare and telemedicine.

62. Energy is critical for legal and government services.

63. Energy is needed for transportation and delivery services.

64. Energy is important for customer service and support.

65. Energy is necessary for manufacturing and supply chain management.

66. Energy is essential for research and development.

67. Energy is required for data centers and cloud computing.

68. Energy is critical for cybersecurity and privacy protection.

69. Energy is needed for artificial intelligence and machine learning.

70. Energy is important for autonomous vehicles and drones.

71. Energy is necessary for robotics and automation.

72. Energy is essential for virtual and augmented reality.

This model shows DNA, chromosomes, and genes. If B is a cell and C is the nucleus, what is A?

Answers

Based on the information, we can infer that A. represents a Mitochondria.

What is a mitochondria?

Mitochondria is a term to refer to the eukaryotic cell organelles responsible for supplying most of the energy necessary for cell activity through the process called cellular respiration.

Based on the information, we can infer that the element that is labeled with the letter A is a mitochondrion because its location is that of a mitochondrion. In this case, the mitochondria is red, although in other models it can be represented with another color. In general, it is given this shape and this color to distinguish it from other elements of the cell.

Note: This question is incomplete. Here is the complete information:

Attached image

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The 2001 World Trade Center attacks fall under which category of terrorism?

foreign-sponsored terrorism on U.S. soil

domestic-sponsored terrorism on U.S. soil

cyberwarfare and domestic terrorism

terrorism abroad that affects U.S. citizens

Answers

The 2001 World Trade Center attacks fall under which category of terrorism (a).foreign-sponsored terrorism on U.S. soil is correct option.

The 2001 World Trade Center attacks are generally considered to be an example of foreign-sponsored terrorism on U.S. soil. The attacks were carried out by a terrorist organization based in Afghanistan called Al-Qaeda, which was led by Osama bin Laden. The attackers were primarily from Saudi Arabia, but they received training and support from Al-Qaeda operatives based in Afghanistan.

Therefore, the correct option is (a).

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Why is compound interest more advantageous than simple interest

Answers

Compound interest is more advantageous than simple interest because it allows for the accumulation of interest on both the principal amount and the interest earned over time. In simple interest, interest is only earned on the principal amount, while in compound interest, the interest earned is added to the principal amount and then interest is earned on the new, higher amount. This leads to a compounding effect where the interest earned increases over time, resulting in a larger total return on investment. Additionally, compound interest is commonly used for long-term investments such as retirement funds and savings accounts, where the power of compounding can significantly increase the final amount earned.

This graph is a combination of atmospheric carbon dioxide measurements taken from ice cores in Antarctica and air samples atop Mauna Loa. The graph BEST shows how the atmosphere has been affected by an increase in



Responses

Industrial activity
Industrial activity

Photosynthesis
Photosynthesis

Sea Levels
Sea Levels

Ozone Layer

Answers

The graph is a combination of atmospheric carbon dioxide measurements taken from ice cores in Antarctica and air samples atop Mauna Loa, and it clearly shows how the atmosphere has been affected by an increase in industrial activity. Therefore, the correct answer is:

Industrial activity

Storm radios are designed with backup batteries so that it can be used even in case of a power outage. Which sequence best illustrates the energy conversion during power outage?

Answers

During a power outage, storm radios rely on backup batteries to continue operating. This process involves several stages of energy conversion.
Firstly, the energy stored in the backup batteries is converted into electrical energy when the radio is turned on.

The electrical energy is then converted into electromagnetic energy when the radio waves are transmitted from the radio antenna.
When these radio waves reach the receiver, they are converted back into electrical energy, which is then converted into sound energy that can be heard through the speaker.
Throughout this energy conversion process, there is some energy loss due to factors such as resistance in the wiring and inefficiencies in the battery and speaker. However, the backup batteries are designed to provide enough energy to power the radio for a significant period, ensuring that users can stay informed and connected during a power outage.
In summary, the energy conversion sequence during a power outage involves the conversion of stored chemical energy in the battery to electrical energy, then to electromagnetic energy, and finally to sound energy that can be heard through the speaker.

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How did earth change about 2.5 billion years ago when many organisms began using photosynthesis to make food

A. The amount of oxygen in the atmosphere increased

B. Mass extinctions occurred

C. The oceans became larger

D. Rainfall increased

Answers

The amount of oxygen in the air was increased

3-Calculate the total electric current of this circuit:
( ) 10.2 A
( ) 3.45 A
( ) 5.5 A
( ) 7.5 A

Answers

Answer :

7.5 A is the required electric current

Step-by-step explanation:

We are given with 4 resistors which are connected in parallel.

Let

R_1 =10Ω

R_2 = 12Ω

R_3 = 15Ω

R_4 = 20 Ω

First let's calculate the total resistance.

Since the resistors are connected in parallel, Total resistance will be,

[tex]{\boxed{ \implies {\sf {\dfrac{1}{R_{(total)} }= \dfrac{1}{R_1} + \dfrac{1}{R_2} + \dfrac{1}{R_3} + \dfrac{1}{R_4}}}}} \\ [/tex]

Plugging in the required values,

[tex]\implies \sf \dfrac{1}{R_{(total)}} = \dfrac{1}{10} + \dfrac{1}{12} + \dfrac{1}{15} + \dfrac{1}{20} \\ \\\implies \sf \dfrac{1}{R_{(total)}} = \dfrac{6 + 5 + 4 + 3}{60} \\ \\ \implies \sf \dfrac{1}{R_{(total)}} = \frac{18}{60} \\ \\ \implies \sf R_{(total)} = \frac{60}{18} \\ \\ \implies \sf R_{(total)} = 3.33 [/tex]

Hence, The total resistance is 3.33 Ω

Now,

[tex] \implies \sf I = \dfrac{V}{R}[/tex]

Where,

I is currentR is resistanceV is voltage

Plugging the required values

[tex] \implies[/tex] I = 25/3.33

[tex] \implies[/tex] I = 7.5 A

Therefore, The total current in the circuit is 7.5 A

Answer:10.2

Explanation:

The force

Answers

Answer: .

Explanation: .

Eli is a 9-year-old and his friend has asked him to share his test answers. Eli refuses to let his friend cheat off his paper because he does not want to get in trouble with the teacher Given Eli’s age and response, which stage of moral development did he demonstrate:

Group of answer choices

Preoperational

Conventional

Preconventional

Postconventional

Answers

The stage of moral development Eli demonstrated is Preconventional.

The early stage of moral development can be seen in preconventional morality. Up until about age nine, it persists. Children's decisions at this age are mostly influenced by what adults expect of them and the repercussions of disobeying them.

Morality is externally regulated at the preconventional level. In order to avoid punishment or gain rewards, people abide by the rules that are set forth by authority figures. According to this viewpoint, what is morally correct depends on one's ability to get away with it or what will make them feel good about themselves.

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creation
Design a device to minimize impact from a collision.
Design a device to convert one form of energy to another.

In 2-3 paragraphs explain your design, the materials that would be used to construct it, its function, and the relative efficiency of your design compared to something that already exists and performs a similar function

Answers

Designing a device to minimize impact from a collision:

The device I would design to minimize impact from a collision would be a shock absorber made from a combination of rubber and metal. The device would be installed between the two colliding objects, and its function would be to absorb and dissipate the energy of the collision, thereby reducing the impact forces on the objects.
CONSTRUCTION:

The shock absorber would consist of a metal cylinder with a rubber insert that would compress upon impact. The metal cylinder would be made from a strong and durable material such as steel, while the rubber insert would be made from a high-density rubber material with excellent shock-absorbing properties.

Compared to existing shock-absorbing devices such as airbags and crumple zones, this design would be more efficient in reducing the impact forces on the colliding objects. Unlike airbags and crumple zones, which are designed to absorb the impact forces by deforming, the shock absorber would absorb the impact energy through compression and dissipation of the energy as heat.

Designing a device to convert one form of energy to another:The device I would design to convert one form of energy to another would be a piezoelectric generator. The function of this device would be to convert mechanical energy into electrical energy through the use of piezoelectric materials.The piezoelectric generator would consist of a piezoelectric material such as quartz or lead zirconate titanate (PZT) sandwiched between two metal plates. When mechanical stress is applied to the piezoelectric material, it generates an electrical voltage across the metal plates.

Compared to existing devices such as generators and batteries, the piezoelectric generator would be more efficient in converting mechanical energy into electrical energy. This is because the piezoelectric effect is a direct conversion of mechanical energy into electrical energy, without the need for any intermediate steps such as the conversion of mechanical energy into rotational energy in a generator. Additionally, the piezoelectric generator would be smaller and more lightweight than traditional generators, making it ideal for use in portable electronic devices.

Which of the rays drawn above would be correct as the light goes from the air into the water? (5 points)


A

B

C

Answers

The answer to this question is b

Answer:

First option A

Explanation:

Since the light is passing from air (less dense) into water (more dense), it is bends downwards.

The answer above is wrong because like I mentioned light bends when it goes through a medium and option B doesn't match that, so please don't use that answer.

Hope I helped and have a great day ahead.

PLEASE HELP!!! 25 points

Answers

The statement that is true regarding the circuit shown in the question is I₁ > I₃ > I₂ (last option)

How do i know which statement is true?

To know the true statement, we shall determine the current flowing through each resistance. Details below:

For resistor 1

Resistance (R₁) = 2 Ω Voltage (V) = 12 V Current (I₁) =?

Voltage (V) = Current (I) × resistance (R)

12 = I₁ × 2

Divide both sides by 2

I₁ = 12 / 2

I₁ = 6 A

For resistor 2

Resistance (R₂) = 8 Ω Voltage (V) = 12 V Current (I₂) =?

Voltage (V) = Current (I) × resistance (R)

12 = I₂ × 8

Divide both sides by 8

I₂ = 12 / 8

I₂ = 1.5 A

For resistor 3

Resistance (R₃) = 5 Ω Voltage (V) = 12 V Current (I₃) =?

Voltage (V) = Current (I) × resistance (R)

12 = I₃ × 5

Divide both sides by 5

I₃ = 12 / 5

I₃ = 2.4 A

From the above calculation, we can see that I₁ > I₃ > I₂.

Thus, we can conclude that the true statement is I₁ > I₃ > I₂ (last option)

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An electric golf cart develops 1.25 kW of power while moving at a constant speed: (a) Express its power in horsepower: (b) If the cart travels 200 m in 35.0 %, what force is exerted by the cart?

Answers

a) The power of the electric golf cart is approximately 1.674 horsepower.

b) The force exerted by the electric golf cart is approximately 2182.5 Newtons.

Power and force in the Electric golf cart

(a) To convert 1.25 kW to horsepower, we can use the conversion factor:

1 horsepower = 0.746 kW

So, 1.25 kW = (1.25/0.746) horsepower = 1.674 horsepower (approximately)

Therefore, the power of the electric golf cart is approximately 1.674 horsepower.

(b) To calculate the force exerted by the cart, we can use the following formula:

force = power / velocity

where power is in watts, velocity is in meters per second, and force is in Newtons.

First, we need to convert the power of the cart from 1.25 kW to watts:

1 kW = 1000 watts

So, 1.25 kW = 1250 watts

Now, we need to convert the distance traveled by the cart from meters to kilometers, and the time taken from seconds to hours:

200 m = 0.2 km

35.0% = 0.35 hours

Using the formula, we can calculate the force exerted by the cart as:

force = power / velocity

force = 1250 / (0.2/0.35)

force = 1250 / 0.5714

force = 2182.5 N (approximately)

Therefore, the force exerted by the electric golf cart is approximately 2182.5 Newtons.

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Researchers want to assess your intelligence. To do so, they have you
complete a short survey on which you indicate your favorite color. They ask
you to complete this survey multiple times, and you always answer the same
color. Unfortunately, one's favorite color has nothing to do with one's
intelligence. This research survey is best defined as:

Answers

This research survey is an example of a flawed or invalid measure of intelligence.

The research survey that is shown in this question can be defined as a poor measurement tool for assessing intelligence. One can easily identify that the researchers are measuring intelligence by asking about the favorite color of the personnel, which has nothing to do with the intelligence of the person. This survey lack validity which is essential to measure the intelligence of any personnel through a survey.

The survey also lacks reliability as it can't provide consistent results. If the intelligence of any personnel is somehow related to the intelligence of the person, answering the survey multiple times must give the same answer. This doesn't provide consistent result and lack reliability and realism.

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define boiling point

Answers

Answer: boiling point is when the object of a liquid is hot enough to start to boil and create bubbles, and even start to evaporate into gas.

Explanation:

An engine using 1 mol of an ideal gas initially at 18.7 L and 370 K performs a cycle
consisting of four steps:
1) an isothermal expansion at 370 K from
18.7 L to 33 L ;
2) cooling at constant volume to 209 K ;
3) an isothermal compression to its original
volume of 18.7 L; and
4) heating at constant volume to its original
temperature of 370 K .
Find its efficiency. Assume that the
heat capacity is 21 J/K and the universal gas constant is 0.08206 L · atm/mol/K =
8.314 J/mol/K

Answers

To find the efficiency of the engine, we need to first calculate the amount of work done by the engine during the cycle and the amount of heat supplied to the engine. The efficiency is then given by the ratio of the work done to the heat supplied.

1) Isothermal expansion: During this step, the gas expands from a volume of 18.7 L to 33 L at a constant temperature of 370 K. Since the process is isothermal, the gas obeys the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature.

The pressure of the gas during this step can be found by rearranging the ideal gas law:

P = nRT/V

Substituting the given values, we get:

P = (1 mol)(8.314 J/mol/K)(370 K)/(18.7 L) = 162.7 kPa

The work done during this step is given by:

W1 = -∫PdV

where the integral is taken from the initial volume of 18.7 L to the final volume of 33 L. Since the process is isothermal, the pressure can be substituted into the integral:

W1 = -nRT ln(Vf/Vi)

Substituting the given values, we get:

W1 = -(1 mol)(8.314 J/mol/K)(370 K) ln(33 L/18.7 L) = -8201 J

2) Cooling at constant volume: During this step, the gas is cooled from a temperature of 370 K to 209 K at a constant volume of 18.7 L. Since the volume is constant, no work is done during this step. The amount of heat removed from the gas is given by:

Q2 = nCΔT

where C is the heat capacity and ΔT is the change in temperature. Substituting the given values, we get:

Q2 = (1 mol)(21 J/K)(209 K - 370 K) = -3366 J

Note that the negative sign indicates that heat is being removed from the gas.

3) Isothermal compression: During this step, the gas is compressed back to its original volume of 18.7 L at a constant temperature of 209 K. Using the same approach as in step 1, we can find the pressure of the gas:

P = (1 mol)(8.314 J/mol/K)(209 K)/(18.7 L) = 93.0 kPa

The work done during this step is given by:

W3 = -nRT ln(Vi/Vf) = (1 mol)(8.314 J/mol/K)(209 K) ln(18.7 L/33 L) = 4082 J

Note that the negative sign indicates that work is being done on the gas.

4) Heating at constant volume: During this step, the gas is heated back to its original temperature of 370 K at a constant volume of 18.7 L. Again, no work is done during this step. The amount of heat added to the gas is given by:

Q4 = nCΔT = (1 mol)(21 J/K)(370 K - 209 K) = 3381 J

The net work done by the engine during the cycle is given by:

Wnet = W1 + W3 = -8201 J + 4082 J = -4120 J

The net heat supplied to the engine during the cycle is given by:

Qnet = Q2 + Q4 = -3366 J + 3381 J = 15 J

The efficiency of the engine is given by:

η = Wnet/Qnet = -4120 J/15 J = -275.3

Note that the negative sign indicates that the engine is not operating as a heat engine, but rather as a heat pump or refrigerator. This is because the amount of work done by the engine is greater than the amount of heat supplied to the engine, which violates the second law of thermodynamics.

The Titanic had a mass of 52,800 tonnes and was travelling at 41.74 km/h when
the iceberg was sighted. By the time it hit the iceberg 30 seconds later, it had
slowed to 38.5 km/h
What was the force?

Answers

Answer:

Explanation:

mv^2/2/t=712,2kN

What type of circuit is shown

Answers

=When three resistors are connected in parallel, they form a parallel circuit. In a parallel circuit, each resistor is connected across the same two points, with the current split between the resistors.

In this configuration, the voltage across each resistor is the same, but the current through each resistor can be different. The total resistance of the circuit is calculated using the equation:

1/R_total = 1/R1 + 1/R2 + 1/R3

where R1, R2, and R3 are the resistance values of the individual resistors.

The total current in the circuit is equal to the sum of the currents through each resistor:

I_total = I1 + I2 + I3

where I1, I2, and I3 are the currents through each resistor.

The total power dissipated in the circuit can be calculated using the equation:

P_total = V² / R_total

where V is the voltage across the resistors.

In summary, when three resistors are connected in parallel, they form a parallel circuit, with each resistor connected across the same two points, and the current split between them. The total resistance, current, and power dissipated in the circuit can be calculated using the equations provided.

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What is the definition of physical activity?
A.
a movement that stimulates your respiratory system
B.
a movement that causes perspiration
C.
a movement that results in the body’s use of energy
D.
a movement that requires little effort

Answers

Answer:

C. a movement that results in the bodys use of energy

1. solve this!!! pls help

Answers

The angle of arc m RNW is 60°, given that M is the center and RE and AN are diameters.

How to calculate arc angle?

Since RE and AN are diameters, we know that ∠REO and ∠ANO are right angles, where O is the center of the circle. Since M is also the center of the circle:

m∠RMO = 180° - m∠RMN = 80°

m∠EMO = 180° - m∠EMW = 140°

Since ∠RMO and ∠EMO share a common vertex and their non-common sides are radii of the circle, they are congruent. Therefore:

m∠RMO = m∠EMO

80° = 140° - m∠RNW

m∠RNW = 60°

So m RNW = 60°.

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Image transcribed:

10.5.5 Your Turn! HOMEWORK

1. In Circle M, m∠RMN = 100° and m∠EMW = 40°. Calculate m RNW given that M is the center and RE and AN are diameters.

(i) The car starts from rest. From time = 0 to time = 15 s, the car has a constant acceleration to a speed of 28 m/s. From time = 15 s to time = 32 s, the car has a constant speed of 28 m/s. From time = 32 s, the car has a constant deceleration of 2.0 m/s² until it comes to rest. On Fig. 1.1, draw the graph, using the space below for any calculations.​

Answers

The total distance covered during all three phases is approximately 882.375 m.

How to solve

The car undergoes three phases: initial acceleration, constant speed, and deceleration.

In the first phase, it accelerates at 1.8667 m/s² for 15 seconds, covering 210.375 m.

In the second phase, it travels at a constant 28 m/s for 17 seconds, covering 476 m.

In the final phase, it decelerates at 2 m/s² for 14 seconds, covering 196 m.

The total distance covered during all three phases is approximately 882.375 m.

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can someone please explain Question 1 a and e go to me :) ?
i have the answers. i just don't understand why the answers are what they are.​

Answers

In the context of a scientific investigation, it is often important to provide accurate measurements. In this particular case, the mass of water used in the investigation is 0.05 kg.

How to calculate the mass

Energy transferred = mass × specific heat capacity × temperature change

E = m × c × ΔT

We can rearrange this equation to solve for the mass of water:

m = E / (c × ΔT)

Substituting the given values, we get:

m = 1050 J / (4200 J/kg·°C × 0.6 °C) = 0.05 kg

Therefore, the mass of water used in the investigation is 0.05 kg.

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HELP!!! You have two substances, both of which have the same boiling point (or attraction between their molecules).
The first substance is made from molecules that are small (just a few atoms bonded together), and the second substance is made from mol that are larger (many atoms bonded together).
How can it be possible for two such different molecules to yield substances with the same boiling point? Describe the kinds of intermolecu attractions that must be involved and any other properties of the molecules that could cause this result.

Answers

The boiling point of a substance depends on the strength of the intermolecular forces between its molecules. In the case of the two substances you mentioned, even though they have different molecular sizes, they can still have the same boiling point if they have similar intermolecular attractions.

What is the  boiling point about?

For example, the smaller molecule may have a higher polarity due to the presence of polar bonds, which can result in dipole-dipole interactions between molecules. The larger molecule may have a similar dipole moment even though it has more atoms, or it may have a polar functional group that contributes to its intermolecular interactions.

In addition to dipole-dipole interactions, the molecules may also have London dispersion forces, which are present in all molecules due to the random fluctuations in electron density. These forces are proportional to the size of the molecule, so the larger molecule may have a stronger dispersion force even if it is less polar than the smaller molecule.

Therefore,, it is possible for two different molecules to have the same boiling point if they have similar intermolecular attractions, such as dipole-dipole interactions and London dispersion forces. The size of the molecule may also play a role in determining the strength of these forces, but it is not the only factor.

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Two billard balls with identical mass move toward each other, with the positive x-axis to the right. Assume that the collision between them is elastic. If the initial velocities of the balls are +40.0 cm/s and -30.0 cm/s, what are the velocities of the balls after the collision? Assume friction and rotation are unimprotant.

Answers

The velocities of the two balls after the collision are +70.0 cm/s to the right for both balls.

What is velocity?

Velocity is described as  the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

The  initial momenta of the two balls are:

p1 = mv1 = m(+40.0 cm/s) = +40m

p2 = mv2 = m(-30.0 cm/s) = -30m

m=  mass of each ball.

We know that by the conservation of momentum, the total momentum before the collision is equal to the total momentum after the collision.

p1 + p2 = mv1' + mv2'

mv1 + m(-v2) = mv1' + mv2'

We then Substitute the values for the momenta and solving for v1 and v2

v1 = (-v2) + v1 = (-(-30.0 cm/s)) + (+40.0 cm/s) = +70.0 cm/s

v2 = v1 - v2 = (+40.0 cm/s) - (-30.0 cm/s) = +70.0 cm/s

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write any two difference between watt and pascal​

Answers

watt is a unit of power and pascal is unit of of pressure.

watt is J/s and pascal is N/m².

Pressure is defined as force per unit area. i.e. P = F/A it gives the force on unit area. its SI unit is Pascal (Pa) which is equal to N/m². is a scalar quantity. its dimensions are [M¹ L⁻¹ T⁻²].

Power is the rate of doing work. Power is also defined as work divided by time. i.e. Power = Work ÷ Time. Its SI unit is Watt denoted by letter W. Watt(W) means J/s or J.s-1. Something makes work in less time, it means it has more power. Work is Force times Displacement. Dimension of Power is [M¹ L² T⁻³]

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