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Andreas93 [3]
3 years ago
12

If you push on a railroad boxcar with a force of 200 N and it doesn’t move, you can conclude that

Physics
1 answer:
Nitella [24]3 years ago
4 0

You can conclude that the force of static friction acting on the boxcar is equal to 200N while you're pushing on it.

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Which electromagnetic wave has the lowest frequencies (less than 3×109 hertz)?
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Answer:

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Explanation:

The electromagnetic spectrum includes all different types of waves, which are usually classified depending on their frequency. Ordering them from the highest frequency to the lowest frequency, they are:

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Radio waves are the electromagnetic waves with lowest frequency, their frequency is lower than 300 GHz (3\cdot 10^{11} Hz) and therefore they are the electromagnetic waves with lowest energy (in fact, the energy of an electromagnetic wave is proportional to its frequency). They are generally used for radio and telecommunications since this type of waves can travel up to long distances.

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The effect of the weight is to accelerate the ball, because its direction is the same as the direction of motion of the ball, while the effect of the air resistance is to slow down the ball, because its direction is opposite to that of the motion.

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EXAMPLE A man is 120 cm tall and stands in front of a mirror and sees his full sized image of himself. Using a diagram, calculat
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Answer: the answer is most likely that the mirror is 120 cm tall as well

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umm section 2 and 4

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because at section 2 it starts and at section 4 it moves again and stops at 3.

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