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3 years ago

Atmospheric pressure is greater at the base of a mountain than at

1 answer:

8 0

At the top of the mountain, when he tightens the cap onto the bottole, there is some water and some air inside the bottle. Then he brings the bottle down to the base of the mountain.

The pressure on the outside of the bottle is greater than it was when he put the cap on. If anything could get out of the bottlde, it would. But it can't . . . the cap is on too tight. So all the water and all the air has to stay inside, and anything that can get squished into a smaller space has to get squished into a smaller space.

The water is pretty much unsquishable.

Biut the air in there can be COMPRESSED. The air gets squished into a smaller space, and the bottle wrinkles in slightly.

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In reading the instruction manual that came with your garagedoor opener, you see that the transmitter unit in your car produces

iVinArrow [24]

Answer:

0.09221 V/m

Explanation:

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

P = Power of transmitter = 250 mW

r = Distance to source = 42 m

c = Speed of light = $3\times 10^8\ m/s$

$E_0$ = Electric field amplitude

Intensity of a wave is given by

$I=\frac{P}{4\pi r^2}\\\Rightarrow I=\frac{250\times 10^{-3}}{4\pi \times 42^2}\\\Rightarrow I=1.12779\times 10^{-5}\ W/m^2$

Intensity is also given by

$I=\frac{E_0^2}{2\mu_0 c}\\\Rightarrow E_0=\sqrt{I2\mu_0 c}\\\Rightarrow E_0=\sqrt{1.12779\times 10^{-5}\times 2\times 4\pi \times 10^{-7}\times 3\times 10^8}\\\Rightarrow E_0=0.09221\ V/m$

The electric field amplitude at the receiver when it first fails is 0.09221 V/m

3 0

4 years ago

Apply what you know about forces to hypothesize how balanced and unbalanced forces acting on a moving car would affect the motio

rosijanka [135]

If an object has a net force acting on it, it will accelerate. The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an objectchanges its speed and/or direction of motion. An unbalanced force is an unopposedforce that causes a change in motion.
thus the car would get its speed, and or direction mixed up

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4 years ago

Regina has a very busy schedule and can only exercise every now and then. How do the benefits of occasional exercise compare wit

bixtya [17]

Answer:

Explanation:

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3 years ago

What happens to the mass of a metal ball if its heated?

erik [133]

Mass doesn't change when the temperature of the ball changes.
(Unless, of course, it gets so hot that it melts, and part of it falls off
and rolls under the table.)

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3 years ago

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Which tool would you use to measure the amount of rainfall?

zheka24 [161]

Answer:

Explanation:

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