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Kay [80]
3 years ago
9

4)

Physics
1 answer:
Citrus2011 [14]3 years ago
6 0

Answer:

net force is positive downward..B

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Which material would you expect to have greater resistance, plastic or silver? Explain your answer.
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Answer:

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Explanation:

because it is an insulator that it is a poor conductor of electricity.

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A sphere is filled with air. If the volume of the sphere is increasing at a rate of 569 cubic inches per minute, what is the rat
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What is the direction of the electric force exerted by paperclip 1 on paperclip 2?
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In general, the electric force in an electric field is exerted outward from a positive atom, and inward for the negative atom. Therefore based on the figure you specified, we can say that the <span>electric force exerted by paperclip 1 on paperclip 2 is repulsive.</span>
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How fast is sound when traveling through water?
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Sound travels 1,480 meters per second, which is about 4.3 times as fast as air. Sound travels much slowly in air. This has to do with the frequency, intensity and amplitude of waves, which are affected differently in water and air.

4 0
3 years ago
In Europe the standard voltage in homes is 220 V instead of the 120 V used in the United States. Therefore "100-W" European bulb
Maslowich

Explanation:

In Europe the standard voltage in homes is 220 V instead of the 120 V used in the United States.

100-W European bulb would be intended for use with a 220-V potential difference.

(a) If V = 220 V and P = 100 W

Power :

P=\dfrac{V^2}{R}\\\\R=\dfrac{V^2}{P}\\\\R=\dfrac{(220)^2}{100}\\\\R=484\ \Omega

If you bring a "100-W" European bulb home to the untied States, what should be its US power rating. So,

P=\dfrac{V^2}{R}\\\\P=\dfrac{(120)^2}{484}\\\\P=29.75\ W

or

P = 29.8 watts

(b) Let I is the current will the 100-W European bulb draw in normal use in the United States. So,

I=\dfrac{V}{R}\\\\I=\dfrac{120}{484}\\\\I=0.248\ A

Hence, this is the required solution.

3 0
3 years ago
Read 2 more answers
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