How many laws of energy are there

Work output of a machine is always less that the work input due too

1. Calculate the mechanical advantage of a machine that has an input force of 13 N and an output force of 65 N.

A ball is falling from the second floor balcony to the floor below The KE increases, decreases, or constant The PE increases, decreases, or constant

Suppose a straight 1.00-mm-diameter copper (density = 8.9 x103 kg/m3) wire could just "float" horizontally in air because of the force due to the earth's magnetic field, which is horizontal, perpendicular to the wire, and of magnitude 5.0 x 10-5 t.

What type of bridge is used for spanning very long distance

Protons have electrical charge; electrons have. electrical charge

The mass of a newborn baby is 4.2 kilograms what is the baby's weight? (The acceleration due to gravity is 9.8 m/s2)

What holds the atoms together in a covalent bond

The sun is the centermost star of our solar system. a. True b. False

When an electron moves from a lower to a higher energy level