2 years ago

If air resistance acts on a falling object will all of its potential energy be converted into kinetic energy?

Physics

1 answer:

Mademuasel [1]2 years ago

6 0

Answer:

No, some energy will be dissipated energy due to work of air resistance.

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Explain how thermal conductivity occurs in poor conductor materials

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Answer:

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Explanation:

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How long must a 0.70-mm-diameter aluminum wire be to have a 0.40 a current when connected to the terminals of a 1.5 v flashlight

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By using Ohm's law, we can find what should be the resistance of the wire, R:
$R= \frac{V}{I}= \frac{1.5 V}{0.40 A} =3.75 \Omega$

Then, let's find the cross-sectional area of the wire. Its radius is half the diameter,
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So the area is
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And by using the resistivity of the Aluminum, $\rho=2.65 \cdot 10^{-8} \Omega m$ , we can use the relationship between resistance R and resistivity:
$R= \frac{\rho L}{A}$
to find L, the length of the wire:
$L= \frac{RA}{\rho}= \frac{(3.75 \Omega)(3,85 \cdot 10^{-7} m^2)}{2.65 \cdot 10^{-8} \Omega m}=54.48 m$

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3 years ago

You must record your daily workouts on a

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I do a yoga mat that could be different to your answer

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With the water trap being used, all the possible sources of error would be eliminated.

Phoenix [80]

Answer:

True