To calculate instantaneous speed, we need to divide part of the total distance traveled by time. However, we don't want to use the distance of the entire trip, because that will give us average speed.
Energy is neither created nor destroyed
E in = E out
750 J in so 750 J out
Answer: Glare appears on a computer screen when light from the surroundings reflects off of the screen's surface. Some computer screens have a special coating to reduce glare. Which best explains how the coating works? The surface of the coating is rough, so light that shines on it gets scattered in many directions.
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If the twin in the spaceship travels at a speed close to the speed of light, seen from Earth, the time of the traveling twin passes very slowly. Therefore, upon returning to Earth, less time has passed for him, compared to the twin who remains on Earth, that is, he is younger, while the twin who remains on Earth is older.