A force of 18 lb is required to hold a spring stretched 8 in. beyond its natural length. How much work W is done in stretching it from its natural length to 11 in. beyond its natural length? W = ft-lb

An action force is 40 N to the right. The reaction force must be: A. 20 N left B. 40 N left C. 20 N right D. 40 N right

Now is studying wave a and wave b. Wave A is rated at 100 dB, and wave B is rated at 90 dB. Which statement can be made about the waves?

Work is being done in which of these situations? all motions are at a constant velocity

A pendulum with a mass of 1 kg is released from a height of 1.5 cm above the height of its resting position?

Which of the following types of weather data is measured as a percentage?. A] air pressure. B] precipitation. C] relative humidity. D] wind speed

What are at least three types of energy involving a microwave

1. At one time, people thought that heat was a substance called

How are magnet'so magnetic force and magnetic field different

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground? A. A bird sat on a telephone wire. B. A woman moved her child from one place to another in a wagon. C.

What types of mediums are involved in the energy transfer