Why does an electrically heated mirror stay clear when a person has a shower?

Answers

Answer 1

Answer: The reason that moisture usually condenses on a mirror is because the air
in the room is warm and humid, the cold mirror cools the air right next to it,
and some of the water condenses out of the cooled air. If the mirror is warm,
then even the air that's right next to it stays warm, and there's no condensation
on the mirror.

Related Questions

Which of the following is not accurate when describing solids? A. Solids are better conductors of heat than liquids B. The amount of pressure exerted by a solid is solely dependent on its mass. C. Solids with many air pockets are good insulators. D. Molecules in solids are closer together than molecules in liquids.
What is the potential of a 35kg child sitting at the top of a slide that is 3.5m above the ground? What is her kinetic energy if she moves down the slide at a speed of 5.0m/s??
Name the device which measure distance travelled by the body
Which of the following is a scalar quantity?
Question 17 options:A 71.8 kg man goes from an area where the acceleration due to gravity is 9.79 m/s2 to an area where the acceleration due to gravity is 9.82 m/s2.What is the change (in kilograms), to the mass of the man? Respond to three significant digits expressed as a.bc and remember to record your responses for a, b, and c in that order.(i was thinking the answer would be 0 but im not sure)

A puck moves 2.35 m/s in a -22° direction. A hockey stick pushes it for 0.215 s, changing its velocity to 6.42 m/s in a 50.0° direction. What was the direction of the acceleration?

Answers

The puck starts with velocity vector

$\vec v_0=\left(2.35(\rm m)/(\rm s)\right)(\cos(-22^\circ)\,\vec\imath+\sin(-22^\circ)\,\vec\jmath)=(2.18\,\vec\imath-0.880\,\vec\jmath)(\rm m)/(\rm s)$

Its velocity at time $t$ is

$\vec v=\vec v_0+\vec at$

Over the 0.215 s interval, the velocity changes to

$\vec v=\left(6.42(\rm m)/(\rm s)\right)(\cos50.0^\circ\,\vec\imath+\sin50.0^\circ\,\vec\jmath)=(4.13\,\vec\imath+4.92\,\vec\jmath)(\rm m)/(\rm s)$

Then the acceleration must have been

$\vec v=\vec v_0+(0.215\,\mathrm s)\vec a\implies\vec a=(\vec v-\vec v_0)/(0.215\,\rm s)=(9.06\,\vec\imath+27.0\,\vec\jmath)(\rm m)/(\mathrm s^2)$

which has a direction of about $71.4^\circ$ .

Final answer:

The direction of the acceleration is determined by the direction of the change in velocity. This would be calculated by subtracting the initial velocity vector from the final velocity vector. However, the calculation would involve complex trigonometric functions.

Explanation:

In order to find the direction of the acceleration, we need to calculate the direction of the change in velocity and that direction will be the direction of the acceleration.

To calculate the change in velocity, we subtract the initial velocity from the final velocity: (6.42 m/s, 50.0°) - (2.35 m/s, -22°). We then calculate the angle of this vector which represents the change in velocity, and hence the direction of acceleration.

However, this calculation is not straightforward because it involves vector operations and would require the use of trigonometric functions to solve. This is due to the fact that velocity is a vector, meaning it has both a magnitude and a direction. Consequently, this becomes a multi-step process involving trigonometry and physics.

Learn more about Direction of Acceleration here:

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A car accelerates uniformly from +10.0 m/s to +40.0 m/s over a distance of 125 m. How long did it take to go that distance? Show all your work, including the equation used, given and unknown quantities, and any algebra required. Make sure your answer has the correct number of significant figures.

Answers

The time of motion of the car to the given distance is 5 seconds.

The given parameters;

initial velocity of the car, u = 10 m/s
final velocity of the car, v = 40 ms/
distance traveled by the car, s = 125 m

The time of motion of the car to the given distance is determined by applying average velocity formula as shown below;

$s = ((u+ v)/(2) )t\n\n125 = ((10 + 40)/(2) )t\n\n125 = 25t\n\nt = (125)/(25) \n\nt = 5 \ s$

Thus, the time of motion of the car to the given distance is 5 seconds.

Learn more here:brainly.com/question/18297834

Answer:

Explanation:

$v^2-u^2=2as\n40^2-10^2=2a*125\n1600-100=250a\na=(1500)/(250)=6~m/s^2\nv=u+at\n40=10+6t\n6t=30\n t=(30)/(6)=5 ~s$

A capoeira é muito mais que uma luta, por isso os campeonatos internos tem o objetivo de: 1 ponto Testar a força dos participantes. Criar lutadores profissionais. Avaliar o indivíduo como um todo. Competir quem faz mais golpes.

Answers

Answer:

Avaliar o indivíduo como um todo.

Explanation:

O graduado na capoeira, é uma pessoa que recebe mais respeito pelo grupo. Sendo portanto o objetivo de cada exame interno, ou pelo menos deveria ser em sua vasta maioria avaliar o indivíduo como um todo.

The strength of the force of gravity depends ona. the masses of the objects and their speeds.
b. the masses of the objects and the distance between them.
c. the weight of the objects and their speeds.
d. the masses of the objects and their weights.

Answers

The correct answer to the question is : B) The masses of the objects and the distance between them.

EXPLANATION :

Before going to answer this question, first we have to understand Newton's law of gravitation.

As per Newton's law of gravitation, everybody in the universe attracts every other body with a force called gravitational force or force of gravity which is directly proportional to the product of masses of the two bodies, and inversely proportional to the square of separation distance between them.

Let us consider two bodies of masses M and M' which are separated by a distance R.

The gravitational force acting between them is calculated as -

Gravitational force $F=\ G(MM')/(R^2)$

Here, G is known as universal gravitational force constant.

From above, we see that force of gravity depends on the masses of the objects and the distance between them.

The strength of the forces of gravity between two objects is completely
determined by their masses and the distance between them.

Their speeds have no effect on the gravitational force, and their weight
IS the gravitational force.

Under what conditions can light be modeled like a ray? Like a wave?

Answers

when the aperture or object size is equivalent to the wavelength of light

. A nonnative species of animal is introduced into a healthy ecosystem. In it's new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future.a.) Biodiversity and ecosystem health will both increase in the future.
b.) Biodiversity and ecosystem will both decrease in the future.
c.) Biodiversity will decrease and ecosystem health will increase in the future.
d.) Biodiversity will increase and ecosystem health will decrease in the future.

Answers

i believe the answer is B!

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