A horizontal force of 25 N is required to push a wagon across a sidewalk at a constant speed. a. What is the net (unbalanced) force acting on the wagon? b. What is the value of the force of friction acting on the wagon? c. If the force on the wagon increased to 30 N, use Newton's law to explain what the effect would be.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?