Explain how a smoke detector works and how the ions create an electric current in the detection chamber.

Here, the water in the wet cloth evaporates and make the heat also evaporated and keep the container of milk cool and devoid of microbes.

Refrigeration is the process of keeping materials in freezing point temperature and the ultimate cooling prevent the microbes attacking  the food materials.

If refrigeration is not possible in a place, we can keep a material cool by placing it in a bowl of water as seen in  the image and the container must be closed by a wet damp cloth.

Here, when the milk bottle is placed in the water bowl and closed by the cloth , water tends to evaporate through the cloth for which heat energy is needed. So it takes away the heat inside by evaporation and keeps the container and material inside cooler.

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[tex]a \: pathogen \: is \: a \\ \: micro - organism \: that \: can \: cause \\ disease[/tex]

#a is the answer

hope it's helpful to you

The kinetic energy of the roller coaster car is 40, 914. 08 J.

The kinetic energy (KE) of a moving object is given by the formula:

KE = ( 1 / 2 ) mv ²

Where m is the mass of the object and v is its velocity.

In this case, the mass of the roller coaster car is 311.11 kg and its velocity is 16.22 m/s. Substituting these values into the formula, we get:

KE = ( 1 / 2 ) ( 311.11 kg )( 16.22 m/s) ²

KE = (0.5) (311.11 kg) ( 263. 02 m ² /s ²)

KE = 40, 914. 08 joules (J)

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Answer:

Explanation:

The power on the primary side of a transformer is equal to the power on the secondary side, neglecting losses. This is because power is conserved in a transformer.

Therefore, if the power on the primary side is 2 MW, then the power on the secondary side will also be 2 MW.

So, the correct answer is: 2 MW.

The spaceship appears to be 38.97 meters long as measured by the mission control in Texas.

This is a problem involving length contraction, which is a consequence of Einstein's theory of special relativity. According to special relativity, an object in motion appears to be shorter in the direction of motion as measured by an observer at rest relative to the object.

The formula for length contraction is:

L' = L / γ

γ is the Lorentz factor, given by:

γ = 1 / sqrt(1 - v^2/c^2)

In this problem, the spaceship is traveling at a velocity of 0.5c relative to Earth. Therefore, the Lorentz factor is:

γ = 1 / sqrt(1 - (0.5c)^2/c^2) = 1 / sqrt(1 - 0.25) = 1.1547

The proper length of the spaceship is 45 m, as measured by the crew on the spaceship. Therefore, the observed length of the spaceship, as measured by mission control in Texas, is:

L' = L / γ = 45 m / 1.1547 = 38.97 m (rounded to two decimal places)

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The capacity of water to transmit electrical current is determined by its conductivity. The quantity of electrical ions in the water has a direct impact on this ability

A material's electrical resistivity, also known as particular electrical resistance or volume resistivity, determines how effectively it opposes electric current. For example, pure water has a high electrical resistivity and is an insulator. A substance that easily permits electric current has a low resistivity. Greek character is often used to denote resistance (rho). The ohm-meter (m) is the SI measure of electrical impedance.

For instance, if the resistance between the sheet contacts on two opposing sides of a solid material square measuring 1 m3 is 1, the material has a resistivity of 1 m.

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The term that refers to a variable that is dependent on another variable during an experiment is called a dependent variable.

A dependent variable is a variable that transitions as a consequence of the independent variable manipulation. It's the effect you're inquisitive in estimating, and it "depends" on your independent variable. The dependent variable is what you document after you've used the independent variable. The dependent variable depends on other importance. The dependent variable is calculated during the experiment.

The dependent variable has the capacity to operationalize; this can be accomplished by discerning the response of the dependent variable and measuring it.

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Answer:

27J

Explanation:

Work done =force×distance

Therefore

Work done =18×1.5

Work done =27J

The length of the third side of the triangular piece of land is approximately 125.7 m, and the angle between the first and third side is approximately 79.4° .

To find the length and orientation of the third side c, we can use the law of cosines, which states:

c² = a² + b² - 2ab cos(C)

where c is the length of the third side, a and b are the lengths of the first two sides, and C is the angle between sides a and b.

To find the angle C, we can use the law of sines, which states:

sin(C) / c = sin(A) / a = sin(B) / b

where A and B are the angles opposite sides a and b, respectively.

We can use the given measurements to calculate the values of a, b, and A:

a = 80.0 m

b = 105 m

To find angle A, we can use the law of cosines:

A = cos^-1[(b² + c² - a²) / (2bc)]

Since the angle between sides a and b is the same as the angle between sides b and c, we can use the same value for angle A and angle C. Therefore:

C = cos^-1[(a² + b² - c²) / (2ab)]

We can rearrange the law of sines to solve for c:

c = (a sin(C)) / sin(A)

Substituting the values we have calculated:

A = cos^-1[(105² + c² - 80²) / (2 x 105 x c)]

C = cos^-1[(80² + 105² - c²) / (2 x 80 x 105)]

c = (80 sin(C)) / sin(A)

Using a calculator, we get:

A ≈ 38.4°

C ≈ 79.4°

c ≈ 125.7 m

Therefore, the length of the third side and the angle between the first and third side is calulated to be 79.4° and  125.7 m (approx.)

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Due to theta's value of 90, flux in the x, y, and z planes will actually be zero. As long as the loop stays within the xz plane, which is parallel to the y axis that provides the most area again for passage of a magnetic field,

Flow = BA cos(theta) It will be at its highest if theta is zero and zero is ninety degrees.

The largest region for a magnetic field to flow through during a loop is situated in the xz plane, where theta is 90, is where flux will be zero in the xy plane and the yz plane.

Flow = BA cos(theta) It will be at its highest if theta is zero and zero is ninety degrees. In this situation, theta is 90, hence flux will indeed be 0 in the x, y, and z planes.

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The speed of the wave is 4 m/s.

option A.

The speed of a wave depends on the type of wave and the medium through which it is traveling. In general, the speed of a wave can be calculated by multiplying the wavelength of the wave by its frequency.

In a vacuum, electromagnetic waves (such as light) travel at a constant speed of approximately 299,792,458 meters per second, which is commonly referred to as the speed of light.

For this given question, if the wave oscillates 4 times per second, then the speed is 4 m/s.

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If natural gas were to be our primary way for generating electricity, it would have both positive and negative effects on individuals and the environment.

One of the positive effects is that natural gas is a cleaner-burning fossil fuel compared to coal and oil. It emits less greenhouse gases and pollutants, which can result in improved air quality and human health benefits. Additionally, natural gas is abundant and domestically produced, which can lead to greater energy independence and reduced reliance on foreign oil.

However, there are also negative effects of using natural gas as the primary source of electricity. One of the biggest concerns is the environmental impact of hydraulic fracturing or fracking, which is a common method of extracting natural gas from the ground. Fracking can lead to water contamination, air pollution, and other environmental risks. Additionally, natural gas is still a fossil fuel, which means that it is a non-renewable resource and will eventually run out.

Furthermore, relying on natural gas for electricity generation can also have negative impacts on individuals in terms of energy costs. While natural gas prices have been relatively low in recent years, they can still be subject to price fluctuations, which can result in higher energy bills for consumers. Additionally, natural gas pipelines and infrastructure can be prone to leaks and explosions, which can pose safety risks for nearby communities.

In conclusion, while natural gas can offer some benefits as a primary way for generating electricity, it is important to weigh the potential negative effects on individuals and the environment. Alternative sources of energy such as renewable resources should also be considered to promote a more sustainable and environmentally-friendly energy future.

Based on the information provided, if Planet 11 has a much stronger force of gravity than Planet Will, we can infer that Planet 11 has a greater mass than Planet Will. This is because the force of gravity is directly proportional to the mass of an object. A planet with a greater mass will exert a stronger gravitational force on objects within its vicinity than a planet with a lower mass, assuming the two planets have the same diameter.

This relationship can be explained by the law of universal gravitation, which states that the force of gravity between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them. Therefore, if Planet 11 has a stronger gravitational force than Planet Will, it must have a greater mass, assuming that the distance between the two planets is the same.

In summary, the stronger force of gravity on Planet 11 compared to Planet Will implies that Planet 11 has a greater mass than Planet Will.

The parallel circuit containing three resistors' equivalent resistance is thus found to be 1.64 ohms.

The electrical resistance measured in Ohms is a measure of a conductor's ability to create a current of one amp when a voltage of one volt is applied across its terminals.

Ohm defines the "1 Ohm" measure of resistance as the distance between two places in a wire where 1 volt would push 1 amp, or 6.241 1018 electrons, when applied. Greek letter "," sometimes known as omega and pronounced "ohm," is typically used to denote this value in schematics.

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Answer:

B or 1.6

Explanation:

The frequency of the object, given that it produces 120 vibrations in 4 seconds is 30 Hertz

Frequency is defined as the number of complete oscillations made in 1 second. This is illustrated by the following formula:

Frequency (f) = Number of oscillation (n) / time (s)

From the question given above, the following data were obtained:

The frequency can be obtained as follow:

Frequency (f) = Number of oscillation (n) / time (s)

Frequency (f) = 120 / 4

Frequency = 30 Hertz

Thus, we can conclude, the frequency is 30 Hertz

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Answer:

The value of G is constant (does not depend on masses M1 and M2)

However, F (force) would be smaller and harder to measure

The gravitational constant is proportional to mass and not density

To solve for the mass, use and derive the following formula for the momentum problem:

p = mv

m = p / v

where:

m is the mass if the object

p is the momentum (24,500 kg•m/s.)

v is the velocity of the object (20 m/s.)

m = p / v

m = 24, 500 kg•m/s ÷ 20 m/s

m = 1225 kg.

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While building a house, it's crucial to take energy transmission into account because homes lose a lot of thermal energy. Radiation, conduction, and convection are three ways they can lose energy.

Buildings must consider heat transfer while designing the fabric of the structure as well as the passive and active systems required to provide the desired thermal conditions with the least amount of resource use.

The three most crucial variables are temperature, moisture content, and density. Thickness, air velocity, pressing, and ageing time are further considerations. The correlation between the key variables and thermal conductivity is shown.

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Answer:Radius =70cm

Distance covered in one rotation = circumference of wheel =2πr

=2×

7

22

​

×70

=440cm

Distance covered in 300 rotation =300×440

=132000=

100000

132000

​

=1.32km

Given that distance of 1.32km is covered in 5 minutes or  

60

5

​

 hour.

Therefore,

Speed of cycle =

time

distance

​

=

(

60

5

​

)

1.32

​

=

5

1.32×60

​

=15.84km/hr

Explanation:

Observing and controlling are on opposite ends of the secretary function.

The secretary function is a model used in organizational behavior to describe the process of selecting the best candidate from a pool of applicants. The model assumes that a decision-maker must choose from a fixed number of candidates in random order, without being able to go back and reconsider candidates that have been passed over. The decision-maker can either accept or reject each candidate, but once a candidate is rejected, they cannot be reconsidered.

In this context, "observing" refers to a decision-making style where the decision-maker takes a passive role and simply observes the candidates as they come, without intervening or taking any action. "Controlling," on the other hand, refers to a decision-making style where the decision-maker takes an active role and tries to control the outcome by setting a high threshold for acceptance and rejecting candidates who do not meet that threshold.

Therefore, observing and controlling are on opposite ends of the secretary function, representing two different decision-making styles that can be used when selecting the best candidate from a pool of applicants.

The mass of the planet is 3.40 x 10^24 kg. and the mass of the star is 6.50 x 10^30 kg.

A). g = GM/r^2

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

M = gr^2/G

Plugging in the given values, we get:

M = (12.5 m/s^2) x (1.70 x 10^7 m)^2 / 6.67 x 10^-11 Nm^2/kg^2

M = 3.40 x 10^24 kg

B). T^2 = (4π^2/G(M+m)) x a^3

M = (4π^2/G) x a^3 / T^2 - m

Plugging in the given values, we get:

M = (4π^2/6.67 x 10^-11 Nm^2/kg^2) x (2.70 x 10^11 m)^3 / (402 earth days)^2 - 3.40 x 10^24 kg

M = 6.50 x 10^30 kg

The solar system is a system consisting of the Sun, eight planets, dwarf planets, moons, asteroids, comets, and other celestial bodies that are bound together by gravity. The system is located in the Milky Way galaxy, about 25,000 light-years away from the galactic center. The Sun is at the center of the solar system, and the planets orbit around it in elliptical paths.

The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The dwarf planets include Pluto, Ceres, Haumea, Makemake, and Eris. Moons orbit around the planets and asteroids and comets travel in their own paths throughout the solar system. The study of the solar system involves understanding the physical and chemical processes that occur on and within these celestial bodies, as well as their formation and evolution over time.

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Answer:

Acceleration

Explanation:

I just know trust me I have this answer (sorry if I out ice) and I got it right

Answer: I would say the answer to this question is Acceleration

Explanation:

Explanation:

Plastics with a density less than or equal to 1.025 g/mL will float in seawater, while plastics with a density greater than 1.025 g/mL will sink.

Here are some examples of plastic densities:

Polyethylene terephthalate (PET) has a density of approximately 1.38 g/mL, so it will sink in seawater.

Polypropylene (PP) has a density of approximately 0.9 g/mL, so it will float in seawater.

High-density polyethylene (HDPE) has a density of approximately 0.95 g/mL, so it will float in seawater.

Polystyrene (PS) has a density of approximately 1.05 g/mL, so it will sink in seawater.

Based on the above examples, we can see that plastics such as polypropylene and high-density polyethylene will definitely float in seawater, while others such as polyethylene terephthalate and polystyrene will definitely sink. Other types of plastics with densities close to 1.025 g/mL may float or sink depending on their exact density and the conditions of the water, such as temperature and salinity.

The force between the charged spheres is -5.4 x 10¹⁰ N.

option D.

The force between two charged spheres can be calculated using Coulomb's law, which states that the force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.

The formula for Coulomb's law is:

F = kq1q2/d^2

where;

The value of the Coulomb constant is 8.98755 × 10^9 N·m^2/C^2.

Plugging in the values given in the problem, we get:

F = (8.98755 × 10^9) * (2 C) * (-3 C) / (1 m)^2

Simplifying this expression gives:

F ≈ -5.4 x 10¹⁰

Therefore, the force between the spheres is -5.4 x 10¹⁰ N, which means that the spheres are being pulled towards each other. The negative sign indicates that the force is attractive due to the opposite charges on the spheres.

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E. coli has adapted to grow best at the optimum temperature range most conducive to its optimal enzymatic activity and metabolic processes, allowing for efficient and rapid growth in the human body.

37 degrees celsius is the most appropriate temperature for e. Coli boom due to the fact it's miles the temperature at which e. Coli can successfully carry out its metabolic tactics, which include protein synthesis, DNA replication, and mobile division.

E. Coli is a mesophilic bacterium, which means that it prospers at moderate temperatures commonly found inside the human frame (around 37°c). At decreased temperatures, inclusive of the ones located in refrigeration (4°c), e. Coli boom is slowed, and at better temperatures, such as those found in fever (above 40°c), e. Coli boom is inhibited or may even die.

The cause why e. Coli can develop and divide maximum efficiently at 37°c due to the specific enzymatic and metabolic pathways it possesses. Enzymes are organic catalysts that facilitate the chemical reactions important for existing processes. The enzymes in e. Coli functions optimally at this temperature variety, making an allowance for efficient nutrient uptake, electricity production, and cellular replication.

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The amount of resistance that each resistor has, in this closed circuit, given the batteries is 3 ohms.

In a closed circuit, the total resistance (R_total) is equal to the sum of the individual resistances. We can use Ohm's law to solve for the resistance of each resistor:

Resistance (R) = Voltage (V) / Current (I)

Using Ohm's law, we can solve for the total resistance (R_total) of the circuit:

= V_total / I

= 18V / 2A

= 9 ohms

Since there are three identical resistors in the circuit, we can divide the total resistance by 3 to find the resistance of each resistor:

= 9 / 3

= 3 ohms

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The velocity of Missy, given that she has a kinetic energy of 13700 J and a mass of 55 Kg is 22.32 m/s

Kinetic energy is defined mathematically as

KE = ½mv²

Where

The following data were obtained from the question:

The velocity of missy can be obtained as follow:

KE = ½mv²

13700 = ½ × 55 × v²

13700 = 27.5 × v²

Divide both side by 27.5

v² = 13700 / 27.5

Take the square root of both side

v = √(13700 / 27.5)

v = 22.32 m/s

Thus, the velocity is 22.32 m/s

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The vertical component of the force vector 42 N is 7.29 N and the  that of the vector B is 26 N. Then the resultant vector is 18.71 N. The equilibrant is the same but opposite in direction ie., - 18.71.

Vectors are physical quantities having both magnitude and direction. The quantities with magnitude only are called scalar quantities. Force, work done, displacement , momentum etc are vector quantities.

The resultant of two vectors depends on their magnitude and direction. The given two vectors A and B are in opposite directions. Hence, the resultant vector will be their difference in magnitude.

Vertical component of vector A = 42 cos 80 = 7.29 N

component of vector B = 34 cos 40 = 26 N.

Then, resultant vector = 26 N - 7.29 N = 18.71 N

equilibrant = - 18.7 N.

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Cory's displacement vector has a magnitude of 4.62 km, which is the closest to the 4.6 km value.

The length of the arrow is a symbol for the displacement vector's magnitude, which represents the distance between the locations. The arrow's direction corresponds to the displacement vector's direction.

d = 3 m + 5 m + 6 m = 14 m is the total distance travelled. Visualizing the walking makes it possible to determine the displacement's size. The real distance between A and B is 3 metres, followed by 5 metres from B to D and 6 metres from D to E. |S| =√92+52 = 10.29 m.

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The process produces heat.Hydrochloric acid generates bubbles when a strip containing zinc metal is introduced to the test tube, and the tube gets warm.The hydrogen gas forms, which causes the bubbles.The reaction then produces heat.

Hydrogen gas and zinc chloride are produced quickly by the reaction of zinc with hydrochloric acid.In a single displacement reaction, zinc metal displaces hydrogen to produce zinc chloride and hydrogen gas.Zn (s)+2HCl(aq) ZnCl2(aq)+H2 is an exothermic process that produces a lot of heat (g).

Reason: Zn+2HCl ZnCl2 + H2 is the result of the interaction involving zinc and hydrochloric acid.Single replacement reaction is the name given to this process in which zinc metal replaces hydrogen to produce salts of zinc chloride and hydrogen gas.

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