Blog

A golf ball of mass 0.050 kg is at rest on the tee and has a velocity of 102 m/s immediately after being struck. If the club and ball were in contact for 0.81 ms, what is the average force exerted on the ball?

A block is on a frictionless table, on earth. The block accelerates at 3.0 m/s2 when a 20 N horizontal force is applied to it. The block and table are set up on the moon. The acceleration due to gravity at the surface of the moon is 1.62 m/s2. The weight of the block on the moon is closest to:

A ball thrown horizontally from the top of a building hits the ground in 3.0 s. If it had been thrown with three times the speed in the same direction, it would have hit the ground in

A solid cylindrical bar conducts heat at a rate of 25 W from a hot to a cold reservoir. If both the length and the diameter of this bar are doubled, the rate at which it will conduct heat between these reservoirs will be

You heat a sample of air to twice its original temperature (in Kelvin) in a constant-volume container. The average translational kinetic energy of the molecules is

What happens to a given volume of water when heated from 0°C to 4°C?

Which requires more heat: bringing a pan of liquid water from room temperature (20°C) to the boiling point at 100°C, or converting all of the liquid water to steam at a constant 100°C?

Metal lids on glass jars can often be loosened by running them under hot water. Why is this?

A force of 17 N is applied to the end of a 0.63 m long torque wrench at an angle 45° from a line joining the pivot point to the handle. What is the magnitude of the torque generated about the pivot point?

The zeroth law of thermodynamics pertains to what relational condition that may exist between two systems?