What is the kinetic energy of a 8.46×104 gram person moving at a velocity of 27.3 meters per second?

The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?

In a system, when potential energy decreases, then entropy also decreases. true false

Is a copper wire a conductor or insulator?