HELP ASAP

The specific heat capacity of solid copper metal is 0.385 J/g-K. How many joules of heat are needed to raise the temperature of a 1.55-kg block of copper from 33.0 °C to 99.9 °C?

3.71 × 10^−6J

39.9 J

3.99 × 10^4J

0.00371 J

2.69 × 10^5 J
IT IS A CHEMISTRY QUESTION BUT WAS PUT WITH PHYSICS BY MISTAKE SORRY

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

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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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.

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.

(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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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.

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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Radar; atomic & molecular research, microwave ovens, cell phones are possible because of 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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The velocities of the two balls after the collision are +70.0 cm/s to the right for both balls.

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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Answer :

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,

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

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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The pressure exerted on the fluid by the force applied on the small piston can be calculated using the formula:

P = F/A

where P is the pressure, F is the force, and A is the area on which the force is applied. Since the force is applied on the smaller piston, we need to use its area:

A_small = πr_small^2

where r_small is the radius of the smaller piston. Thus,

A_small = π(0.02 m)^2 = 1.2566 x 10^-3 m^2

The force applied on the small piston is 250 N. Thus,

P = F/A_small = 250 N / 1.2566 x 10^-3 m^2 = 1.989 x 10^5 Pa

Therefore, the increase in pressure caused by the 250 N force on the small piston is 1.989 x 10^5 Pa, which is approximately equal to 2 x 10^5 Pa (to two significant figures).

b) We can use the principle of conservation of volume to determine how far the smaller piston moves when the larger piston moves 5 cm. The volume of the fluid in the hydraulic lift remains constant, so we have:

A_small × h_small = A_large × h_large

where h_small and h_large are the heights of the fluid columns above the smaller and larger pistons, respectively. Since the lift is filled with an incompressible fluid, the pressure is the same throughout the fluid. Thus,

P = F/A_small = F/A_large

Multiplying both sides of this equation by the areas of the pistons, we get:

F × A_small = F × A_large

Substituting the given values, we get:

250 N × (π(0.02 m)^2) = F × (π(0.20 m)^2)

Solving for F, we get:

F = 250 N × (0.02 m/0.20 m)^2 = 25 N

Now, we can use the force applied on the larger piston and the area of the smaller piston to calculate the force on the smaller piston:

F_small = F × (A_small/A_large) = 25 N × (1.2566 x 10^-3 m^2 / (π(0.20 m)^2)) = 0.1989 N

Using the formula for pressure, we can calculate the height of the fluid column above the smaller piston:

P = F_small/A_small = h_small × ρ × g

where ρ is the density of the fluid and g is the acceleration due to gravity. Since the density of the fluid and the acceleration due to gravity are constants, we can simplify this equation to:

h_small = F_small/(A_small × ρ × g)

Substituting the given values, we get:

h_small = 0.1989 N / (1.2566 x 10^-3 m^2 × 1000 kg/m^3 × 9.81 m/s^2) = 0.0159 m

Therefore, the smaller piston moves 0.0159 m (or approximately 1.6 cm) when the larger piston moves 5 cm.

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Answer:

A screw gauge, also known as a micrometer screw gauge, is a precision measuring instrument used to measure small distances with high accuracy. It consists of a calibrated screw and a calibrated thimble with a spindle and an anvil face. The spindle is attached to the screw, and the anvil face is fixed to the body of the instrument.

To use a screw gauge, the object being measured is placed between the spindle and the anvil face, and the screw is turned until the spindle makes contact with the object. The thimble is then turned, which moves the spindle and the screw, until the spindle is firmly in contact with the object. The reading on the scale of the thimble is then taken, which gives the distance between the spindle and the anvil face, with a high degree of precision.

Screw gauges are commonly used in a variety of fields, including engineering, machining, and scientific research, where accurate measurements are required.

Screw gauge measures diameter with high accuracy using a screw and nut mechanism. It has a pitch and graduated thimble.

A screw check is an estimating instrument used to gauge the width of items, particularly wires and chambers, with high exactness. It deals with the rule of a screw and nut component.The screw measure comprises of a U-molded outline with a screw toward one side and a thimble at the other.

The screw has a pitch, which is the distance gone by the screw in one complete turn. The pitch is as a rule of the request for 0.5 mm. The thimble is graduated into 50 or 100 equivalent parts. The roundabout scale on the thimble must be changed to such an extent that the zero of the scale matches with the zero of the pitch scale.

To utilize the screw check, the item whose width is to be estimated is set between the iron block and the shaft. The screw is turned until the shaft simply contacts the item. The pitch scale perusing is noted.

The thimble is then turned until the zero of the thimble scale concurs with the middle line of the pitch scale. The thimble scale perusing is then noted. The breadth of the item is then determined by adding the pitch scale perusing and the thimble scale perusing.

Along these lines, a screw check can gauge widths to an exactness of 0.01 mm or better. It is broadly utilized in designing, fabricating, and logical applications.

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Answer: .

Explanation: .

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

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

For resistor 1

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

12 = I₁ × 2

Divide both sides by 2

I₁ = 12 / 2

I₁ = 6 A

For resistor 2

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

12 = I₂ × 8

Divide both sides by 8

I₂ = 12 / 8

I₂ = 1.5 A

For resistor 3

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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The frequency of the waves is 0.25 Hz and the speed of the waves will be 1 m/s.

The distance between adjacent crests is called the wavelength, represented by the symbol λ. In this case, the wavelength is 4 meters.

The vertical distance between the high point (crest) and the low point (trough) is called the amplitude, represented by the symbol A. In this case, the amplitude is 2.2 meters.

The time it takes for one wave to pass a fixed point is called the period, represented by the symbol T. In this case, the period is 4 seconds.

The frequency of the waves is the number of waves that pass a fixed point in one second, represented by the symbol f. It is the reciprocal of the period, so:

f = 1 / T = 1 / 4 = 0.25 Hz

The speed of the waves can be calculated using the wave equation:

v = fλ

where v is the speed of the waves. Substituting the values we have:

v = (0.25 Hz)(4 m) = 1 m/s

Therefore, the frequency of the waves is 0.25 Hz and the speed of the waves is 1 m/s.

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Answer:

an electron.

Explanation:

When you walk on a carpet, some of the electrons from the atoms in the carpet are transferred to your body, giving you a negative charge. The electrons are then transferred back to the carpet when you touch a conductor, such as a doorknob, which can give you a shock due to the discharge of the static electricity.

The net charge when you rub a plastic ruler with fur​ would be infinitesimal or zero

The effect of friction between a plastic ruler and fur is evident when electrons are transferred from the hairy surface to the ruler's plane, ending with the ruler possessing a negative charge while the fur taking on a positive one.

As a result, the whole system presents with a net charge that is negative it converges due to the excess electrons now found on the ruler. However, occasionally, the magnitude of this charge is very small, consequently making it difficult to probe without reliable technology or instruments.

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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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The final velocity's angle with regard to the first asteroid's velocity is the same as the angle of the first asteroid's beginning velocity, which is 15° with respect to the x-axis.

To solve this problem, using the law of conservation of momentum, the two asteroids stick together, so consider them as a single system.

Let's start by finding the initial momentum of the system:

p₁i = m₁v₁i = (18 × 10³ kg)(780 m/s) = 1.404 × 10⁷ kg⋅m/s

p₂i = m₂v₂i = (23 × 10³ kg)(1050 m/s) = 2.415 × 10⁷ kg⋅m/s

The initial momentum of the system is the vector sum of these momenta:

pi ni = p₁i + p₂i = (1.404 + 2.415) × 10⁷ kg⋅m/s = 3.819 × 10⁷ kg⋅m/s

Find the final velocity and direction of the system. Since the two asteroids stick together, final mass is the sum of their initial masses:

mf = m₁ + m₂ = (18 × 10³ kg) + (23 × 10³ kg) = 41 × 10³ kg

To find the final velocity, using the law of conservation of momentum again:

pf in = mf vfin

Since momentum is conserved:

pfin = pini

Therefore:

mf vfin = pini

vfin = pini / mf = (3.819 × 10⁷ kg⋅m/s) / (41 × 10³ kg) = 930.49 m/s

To find the direction of the final velocity, using trigonometry, define the x-axis to be parallel to the initial velocity of the first asteroid, and the y-axis to be perpendicular to the x-axis. Initial velocity of first asteroid has components:

v₁ix = v₁i cos(15°) = 758.19 m/s

v₁iy = v₁i sin(15°) = 199.78 m/s

Similarly, the initial velocity of the second asteroid has components:

v₂ix = v₂i cos(-15°) = 1041.02 m/s

v₂iy = v₂i sin(-15°) = -269.41 m/s

(Note that we use -15° for the second asteroid since its velocity makes an angle of 165° with respect to the x-axis.)

The total momentum of the system has components:

pfinx = pini = 3.819 × 10⁷ kg⋅m/s

pfiny = 0

Therefore, the final velocity of the system makes an angle θ with respect to the x-axis, where:

tan θ = pfiny / pfinx = 0

Since the y-component of the final velocity is zero, the final velocity is parallel to the x-axis.

Therefore, the direction of the final velocity with respect to the velocity of the first asteroid is the same as the direction of the initial velocity of the first asteroid, which is 15° with respect to the x-axis.

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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.

The machine changes how work is done, by making the process easier and increasing output with less effort.

Any device that uses energy to carry out a task is a machine. Machines can be simple, like a lever or pulley, or complex, like a computer or a car engine. The purpose of a machine is to make work easier, faster, or more efficient than it would be without the machine. Different types of energy, including human power, electricity, and fuel, can be used to power machines.

Bicycle: A bicycle is a human-powered machine that allows people to move faster and with less effort than walking or running. A person can travel farther distances faster and with less physical effort by turning the wheels and shifting gears with their pedaling motion.

Ax blade: An ax blade is a cutting tool used for chopping wood. It facilitates the process of splitting wood by utilizing a sharp metal blade to cut through the wood fibers, rather than depending exclusively on physical power to break the wood apart.

Car jack: A car jack is a mechanical device used to lift a car off the ground. A person can raise the car to access the underside for repairs or maintenance by pulling a lever and applying hydraulic pressure. Compared to attempting to lift the car manually, this makes maintenance and repairs easier and safer.

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The time taken by the ball to fall through a distance of 30m is, 2 seconds

To calculate the time taken to fall through a distance of 30m, we have given data as,

mass of ball = 200g

g = 10 m/s^2

Initial height = 50 meter

Final height = 30 meter

So by the laws of motion, we have,

Δh = (ut) + (at²/2)

where, (u = initial velocity), and (t = time)

So,

50-30 = (0.t) + [10 x t²)/2]

20 = 5t²

Therefore, t = ± (2 seconds)

On eliminating the negative value as time can`t be negative here, we get

t = 2 seconds

Therefore, the time taken by the ball to fall through a distance of 30m is, 2 seconds

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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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Based on the information, we can infer that A. represents 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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Answer: the quantity of the substance being measured and make sure to stir the substance before taking the readings, also make your eyesight perpendicular to the scale reading to avoid parallax error

Explanation:

The correct answer is using ultrasonic waves to create images of objects found inside other objects.

Infrasonic Wave: An infrasonic wave is a longitudinal elastic wave whose frequency is lower than that of sound, or 20Hz. For instance: It typically occurs during an earthquake. Ultrasonic Wave: An ultrasonic wave is a longitudinal wave with a frequency greater than the threshold of human hearing, or 20 kHz.

The audible range of frequencies below 20 Hz is known as infrasonic. Volcanoes, earthquakes, and thunder all emit sound in the infrasonic range. Human ears cannot hear this sound, but elephants and whales can. Ultrasonic frequencies are those that are above 20,000 Hz.

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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:

Since the car is moving in a circular path, it is undergoing centripetal acceleration toward the center of the circle. This acceleration is caused by a net force directed towards the center of the circle, which is the resultant force on the car. This force is known as the centripetal force.

Centripetal force is the net force that acts on an object moving in a circular path, directed towards the center of the circle. This force is responsible for the object's centripetal acceleration and is necessary to keep the object moving in a circular path.

According to Newton's second law of motion, F=ma, where F is the net force, m is the mass of the object, and a is the acceleration of the object. Since the car is experiencing centripetal acceleration, which is perpendicular to its velocity, the direction of the net force is also perpendicular to the velocity.

As a result, the direction of the net force on the car is towards the center of the circle. If the net force were to suddenly disappear, the car would move off in a straight line tangent to the circle.

Therefore, Since the net force on the car is constantly changing the direction of the car's velocity, the velocity is also changing. Specifically, the velocity is changing in direction, but not in magnitude, since the car is moving at a constant speed along the circular path. This change in the direction of the velocity is what causes the acceleration, and therefore the centripetal force.

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