Which one of the following substances can be separated into several different elements?

A: Air

B: Iron

C: hydrogen

D: nickel

Sharon wants to rearrange the furniture in her room. How much work will she do if she used 20 N of force to move a 50 kg chest a distance of 15 meters A: 3.3 J B: 300 J C: 1000 J D: 15000 J

Two capacitors, one that has a capacitance of 6 µF and one that has a capacitance of18 µF are first discharged and thenare connected in series. The series combination is then connectedacross the terminals of a 12-V battery.

When two different observers watch a moving object, a. they always see different motion b. both of them always see the same motion c. both of them see the same motion as long as both of them are moving d.

An elevator is moving upwards at a constant velocity of 5 m/s. what is the net acceleration the elevator experiences

Which best describes how ocean ridges form? A. Decaying materials filter from above, creating ridges. B. Corals grow on a submerged rim, forming circular ridges above the water. C.

What is an example of static friction

What is the configuration of NE

Why does ice generally have very little friction when it is in contact with other materials?

A stationary speed gun emits a microwave beam at 2.10*10^10Hz. It reflects off a car and returns 1030 Hz higher. What is the speed of the car?

Discuss the changes in potential energy and kinetic energy and total energy for skateboarder going up and down on a half pipe ramp