Which best describes the magnetic field lines of a bar magnet?

A 10kg and a 5kg mass exert forces on one another, with no other forces acting. Which is true?

A bat strikes a ball initially headed in the positive direction.  The ball reverses direction after impact.  The initial speed of the ball is 4 m/s, it’s mass is 0.5 kg, and it’s diameter is 0.1 m.  What is the magnitude of the ball’s momentum before impact, in SI units?

A walnut drops from the branch of a very tall walnut tree.  The only force acting on it is gravity.  How far does it fall in 1s?

A 100kg mass is placed in water.  How much of it’s volume is submerged when it stops sinking?

Resistor 1 has larger resistance than Resistor 2. They are connected to identical batteries (same voltage). Which one consumes more power?

Pressure and volume, one one side, and the number of particles and temperature, on the other side, of a hot gas, are equivalent because:

For a gas at finite pressure, the processes which increase the internal energy of a gas are:

A mass attached to a horizontal spring is displaced from it’s equilibrium position value by 0.1 m, and then released. It then oscillates back and forth about it’s equilibrium position (i.e. it vibrates). While vibrating, the mass undergoes 20 complete oscillations over 5 seconds.  What is the frequency of oscillation in SI units?

A metal sphere initially holds no charge.  A glass wand has +2 C on it’s tip, and it is brought into proximity of the metal sphere.  The metal sphere has no electrical contact or connection with the wand or anything else through the process.  Which best describes what will happen to the sphere?