All atoms of the same element have the same

A. number of neutrons.

B. number of protons.

C. mass numbers.

D. mass.

Turbulent motions in thunderstorms cause charge separations that result in very large potential differences between the clouds and the ground. When lightning occurs, a large amount of charge is transferred between the cloud and the ground. If 46.

Where is most of Earths phosphorus located?

A 3-kg object experiences a temperature rise of 50°C when 1000 joules of heat are added. Using the same substance, which situation would require the same amount of heat to be added? A) A 6-kg mass experiences a temperature rise of 50°C.

Julia hears crackles and sees sparks as she takes off her wool sweater. What science phenomenon is Julia observing and how does it occur in this situation? • A.

How does chemical energy cause a change? What about electromagnetic energy?

The weight of a 100 N laser printer is spread over 0.5m2. What is the pressure it exerts? A) 50 N/m2 B) 200 N/m2 C) 500 N/m2

Comparing and contrasting ionic and covalent bonds?

Elevation above sea level is called

The train traveled 500 kilometers north to Odessa in 2 hours. What's the train's speed? What is the velocity?

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?