A record is dropped vertically onto a freely rotating turntable. Frictional forces act to bring the record and turntable to a common angular speed. If the rotational inertia of the record is 0,50 fimes that of the turntable, what percentage of the initial kinetic energy is lost? Select one: O a. 66% O b. 33% O c. 75% O d. 18% O e. 46%

What is special about a dc circuit ?

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?

In science and physics what is the standard unit of measure for speed?