Author Question: James Prescott Joule's experiments, such as stirring a container full of liquid, showed that A) ... (Read 70 times)

fagboi · **on:** Jul 29, 2018

James Prescott Joule's experiments, such as stirring a container full of liquid, showed that

A) thermal energy is actually a form of energy.
B) the Newtonian energy forms kinetic, gravitational, elastic are conserved.
C) all forms of energy are conserved.
D) Mr. Joule did not know how to make a good batch of chili.
E) radiant energy is actually a form of energy.

Question 2

A string is wrapped tightly around a fixed frictionless pulley that has a moment of inertia of 0.0352 kg m2 and a radius of 12.5 cm.

The string is pulled away from the pulley exerting a constant force of 5.00 N on the pullley causing the pulley to rotate. What is the speed of the string after it has unwound 1.25 m if the string does not slip on the pulley?
A) 2.09 m/s
B) 2.36 m/s
C) 1.18m/s
D) 3.18 m/s
E) 4.95 m/s