Why is the work output of any real machine less than the work needed to operate it

Which of the following is an accurate conversion of liquid to solid volume? one liter equals one cubic meter 1000 milliliters equal one cubic meter 1000 liters equal one cubic meter one liter equals 1000 cubic meter

In a rock climbing gymnasium a climber with a wt = 125 lbs is climbing vertically for a distance of s = 25 ft with a constant velocity. It takes her t = 3 min to climb up the wall. a) What is the work done by the climber? (2 pts.

if an object is at rest and experiences a force of 100 to the right and 50N to the left which way will the object accelerate?

Why are less massive stars thought to age more slowly than more massive stars have much less fuel?

The magnetic field between the poles of a magnet has magnitude 0.510 T. A circular loop of wire with radius 3.20 cm is placed between the poles so the field makes an angle of 22.0° with the plane of the loop.

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.

Which of the following are steps for balancing chemical equations? Check all that apply. ] A. Multiply the reactants to get the products. B. Change subscripts. O C.

1. Why does the water vapour in clouds condense? 2. Explain why you can see clouds but not see the water vapour in the air

What are some similarities between electricity and gravity?

What's the difference between solids and liquids?