The radius of Mercury is 2400 km, and the acceleration due to gravity at its surface is 3.7 m>s^2. What is the mass of Mercury?

How much heat is required to convert 0.3 kg of ice at 0°c to water at the same temperature

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.