Which equation represents the total energy of a system?
o a) total energy = kinetic energy
ob) total energy = potential energy + gravity
o c) total energy = potential energy + kinetic energy
od) total energy = kinetic energy + activation energy x gravity

Awheel rotates without friction about a stationary horizontal axis at the center of the wheel. a constant tangential force equal to 82.0 n is applied to the rim of the wheel. the wheel has radius 0.150 m . starting from rest, the wheel has an angular speed of 12.8 rev/s after 3.88 s. what is the moment of inertia of the wheel?

Who was the first scientist to measure speed as distance over time?

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron