A wheel and axle has an axle of radius 7cm and a wheel of radius 42cm. calculate the load lifted by the effort of 30N, if the efficiency is 70 percent

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground