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

Less work was done. What is one possible reason why this has happened? A. There was more force applied; therefore, there was less movement. B. There was less force applied; therefore, there was more movement. C.

A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii and are of uniform density. If the three are released simultaneously at the top of an inclined plane and roll without slipping, which one will reach the bottom first?

3. An engine's fuel is heated to 2,000 K and the surrounding air is 300 K. Calculate the ideal efficiency of the engine.

The sun does not normally affect the tides to a noticeable degree. however, under certain circumstances the gravitational pull of the sun does affect the tides. under what two (2) conditions.

What is Newton's law of motion

Lightning often strikes water. a. True b. False

How much work must be done on a 10 kg snowboard to increase its speed from 4 m/s to 6 m/s?

If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? A. The spacecraft will not move because it only works on earth. B.

A fast, white water cascade is also known as what?

What is a stack of membranes that packages chemicals