Stephen can push with 200N of force on a couch. if the couch has a mass of 20 kg, how much acceleration will the couch have? the answers: 4,000 m/s/s, 100 m/s/s, 10 m/s/s, 180 m/s/s.

In the parallel spring system, the springs are positioned so that the 37 N weight stretches each spring equally. The spring constant for the left-hand spring is 2.7 N/cm and the spring constant for the righ-hand spring is 4.3 N/cm.

Explain why the ball looks red under normal light.

How does the electric forest between charged objects change as objects move away from each other

Jack tries to place a magnet on the door of his refrigerator. He observes that the magnets don't stick. He guesses that the door of the refrigerator is made of non magnetic substance.

Instead of rolling down the ramp over the step, imagine the ball falls off the back of the ramp directly to the ground. What is the amount of potential energy remaining after the ball lands on the ground?

When glow sticks were bent, Chemaicals inside reacted to produce a glow?

In addition to possibly releasing harmful chemicals in the environment, mining is considered A. the least dangerous job in the United States. B. the most dangerous job in the United States. C. the least lucrative job in the United States. D.

List some limiting factors that might limit the size of a population within its environment

What do you think is the difference between being imaginative in doing science and Doing pseudoscience?

How are energy and temperature related?