The contraption below has the following characteristics: m1 = 2.0 x 103 kg, m2 = 4.4 x 102 kg,
the man on top of m2 has a mass m = 6.0 x 101 kg,
and all surfaces are frictionless. What is the apparent
weight of the man?

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?