Ball 1, with a mass of 20kg, is moving to the right at 20m/s. At what velocity should Ball 2, with a mass of 40kg, move so that they both come to a stand still upon collision?

Does Your weight will increase on the top of a tall mountain?

If a small-diameter open glass tube is partially immersed in a vessel containing mercury, the surface of the mercury inside the tube will be A. lower than the mercury in the vessel, and shaped like the inside of a bowl. B.

What occurs at thermal equilibrium?

Suppose the Earth orbited the Sun in 4 months rather than 1 year, but had exactly the samerotation speed. How much longer would a solar day be than a sidereal day? Mercury's siderealday is 58.6 days and its orbital period is 88 days.

1) A rock thrown horizontally from the top of a water tower lands 20.0 m from the base of the tower. If the rock was initially thrown at a velocity of 10.0 m/s, a) how high is the water tower? b) What is the final velocity of the rock?

Changing the direction of current will or will not affect the strength of an electromagnet

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?