A spring has a spring constant of 30000 N/m. How far must it be stretched (in meters) for its potential energy to be 47 J?

A ball of mass m and another ball of mass 3m are placed inside a smooth metal tube with a massless spring compressed between them. When the spring is released, the heavier ball flies out of one end of the tube with speed v0.

If the eeg record reveals evidence of very small and very fast waves in a person that otherwise appears to be asleep, and other data indicates the person's eyes are moving back and forth but the rest of the body is still, you are likely to conclude

A-8.5 kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.6 m above the counter? (g=9.8m/s)

When light is absorbed it is most often converted to

The Astronomer Carl Sagan is famous. Why?

What is the fundamental frequency of a particular medium?. a. the lowest frequency at which a standing wave is possible. b. the highest frequency at which s standing wave is possible

The distance from the inner core to the surface of the earth is about 5,200 kilometers. the large amount of material surrounding the inner core places tremendous pressure on it.

What type of wave is sound? longitudinal light surface transversal

What is the difference between meteors and meteorites?

The puzzle box is traditionally associated with the work of