What are four elements that are involved in the cycling of energy and matter on earth

Two engineering students, John with a weight of 92 kg and Mary with a weight of 46 kg, are 30 m apart. Suppose each has a 0.04% imbalance in the amount of positive and negative charge, one student being positive and the other negative.

Nuclear power is the only energy source which gives off radiation. a. True b. False

Which phrases describe an irregular galaxy? Check all that apply. has a round shape contains many young stars contains a lot of gas and dust has arms that extend from the center is smaller than other types of galaxies

Two cellists, one seated directly behind the other in an orchestra, play the same 220-Hz note for the conductor who is directly in front of them.

A projectile leaves a gun at the same instant that the target is dropped from rest. If the projectile is initially aimed straight at the target, will it hit the target?

Read the paragraph below from the section "An Object At Rest Has Potential Energy Potential energy is the energy an object rgy is the energy an object has because of its position. It is energy that is waiting to be released.

Briefly describe the history of the metric system as it applies to the meter and how the definition of a meter has changed over time.

Visible light is an example of?

What were the discoveries of astronomers like Copernicus and Galileo?

A proton and an electron are released from rest, with only the electrostatic force acting. Which of the following statements must be true about them as they move toward each other? (There could be more than one correct choice.) Check all that apply.