What structure do all of these elements have in common? Boron, Carbon, Nitrogen, Oxygen, Flourine.

A) number of protons

B) numbers of electrons

C) number of energy levels

D) number of valence electrons

Under what conditions of temperature and pressure is the behavior of real gases most like that

Simon puts new batteries in his radio-controlled car and its controller. He activates the controller, which sends a radio signal to the car. The car moves forward. Name at least three energy transformations that occurred.

The X-ray source Cygnus X-1 has a mass of at least 11 solar masses and a diameter of only about one-quarter the diameter of the Earth.

Name 3 ways an object can accelerate.

Calculate the acceleration of a car (in m/s^2) that accelerates from 0 to 30 m/s in 6 s along a straight road.

How do you find Rtotal in a series without knowing the voltage?

April swims 50 m north and then turns and swims 20 m back to the south. What is her velocity if it takes her 60 seconds?

All the colors of visible light can combine to form white light. a. True b. False

If the results of a study do not support a hypothesis, it means that the experiment failed.

How does a rubber band obey the law of conservation of energy?