How should science advance?

Give an example of a contact force and a non-contact force. Explain how they are different.

A gust of wind pushes a beach ball with a force of 9 newtons. the ball rolls 10 meters in 3 seconds. what is the power of the wind?

Severe weather often includes destructive events such as Hurricanes and Tornadoes where air is moving much faster than usual. True or False

In the process of melting, what best describes what happens to a solid? a. A solid will gain kinetic energy and become a liquid. b. A solid will lose kinetic energy and become a liquid. c. A solid will gain potential energy and become a liquid. d.

What kind of tide does the observer experience when he is between tidal bulges?

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?

A skydiver with a mass of 60 kg jumps from an airplane. Five seconds after jumping the force of air resistance is 300 N. What is the acceleration of the sky diver, five seconds after jumping?

How many basic wave forms are there? A.) 1 B.) 2 C.) 3 D.) 4

How much power is reqired to lift a 10-n box 2 meters