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A 1250 kg race car accelerates uniformly from rest to 30.0m/s in 4.00s, on a horizontal track with a coefficient of friction of 0.60. what is the average power output caused by the applied force of the car engine?

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume

What about a rubber band, can it change its shape? is it a solid?