Which of the following ways is usable energy lost?

a. friction

c. noise

b. resistance

d. all of the above

A frictionless pendulum of length of 3 m swings with an amplitude of 10o. At its maximum displacement, the potential energy of the pendulum is 10 J. What is the kinetic energy of the pendulum when its potential energy is 5 J? a. 5 J b. 10 J c.

If humans evolved from apes or chimps, why are the chimps and apes still here?

Describe the difference between the temp. of a gas and its pressure?

A cylinder contains 12liters of O2 at 20°c and 15atm. The temperature is raised to 35°c and volume is reduced to 8.5L. Calculate the final pressure. What will be the new pressure if the volume is doubled

James is driving north, at 100km/hour. He uses cruise contrast speed, and the road is straight. What is his rate of acceleration?

Why am i not floating?

A person holds onto an object for 2 minutes, but doesn't move the object. Is work done on the object?

Warming in front of a fire while camping is an example of? A. Conduction B. Convection C. Radiation

In which medium would light travel the fastest? Question 21 options: a. across a room b. in a swimming pool c. through outer space d. through a railroad track

A 0.60 Kilo gram basketball poses on the rim of a basketball hoop that is 3.0 m high find the potential energy of the ball there (use G=10 N/KG.)