What do snow melting, water freezing to ice, and water boiling into steam have in

common? *

O

They involve a change in state.

They involve a change in temperature.

O

They involve a change in thermal energy.

All of the above are true.

Which of the following is not a fundamental quantity? A. time B. weight C. mass D. length E. electric charge

What is the Kinetic energy of a rock with mass of 7 kg being thrown at 25 m/s?

How does a black hole form

Equation for velocity

If it took you 5 seconds to move a rock 15 meters using a force of 150 Newtons, how much power did you need to use?

A 20kg box is dropped 13m. how much work is done

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars