a 70 kg desk sits on the floor motionless If gravity is pulling it with an acceleration of 9.8 m/s/s how much force is gravity exercising on the desk

The tides are ... a renewable energy source a constant energy source an unreliable energy source which is the right statement

Two objects are placed in thermal contact and are allowed to come to equilibrium in isolation. The heat capacity of Object A is three times the heat capacity of Object B and the initial temperature of Object A (TA) is twice the initial temperature

A reaction that requires free energy: a. must be endothermic. b. is nonspontaneous. c. must correspond to a decrease in entropy. d. is spontaneous.

A 300kg motorboat is turned off as it approaches a dock and coasts towards it at. 5 m/s. Isaac, whose mass is 62 kg jumps off the front of the boat with a speed of 3m/s relative to the boat. what is the velocity of the boat after Isaac jumps?

How does folding change rock layers

A 20kg box is dropped 13m. how much work is done

Suppose a person whose mass is m is being held up against the wall with a constant tangential velocity v greater than the minimum necessary. Find the magnitude of the frictional force between the person and the wall

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

Consider a Young's two-slit experiment in which the wavelength of light is 37% smaller than the distance between the slits.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars