1. Which is an example of chemical potential energy changing to kinetic energy?
A. a flag flapping in the wind
B. logs burning on a fire
C. using a battery in a flashlight
D. burning fuel to move a car

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal