If an atom gains two electrons in a chemical reaction, what is its charge?

a

Question 4 options:

a.-2

b.-1

c.+2

d.+1

A spring with a constant of 16 N/m has 98 J of energy stored in it when it is extended. How far is the spring extended?

What is electricity? Why does it happen?

How do you divide 5 km by 2 hours?

Chloroplasts are found in both plant and animal cells. True or False?

A boy is inning with a kinetic energy of 810j. If the boy has a mass of 80kg. What is his speed?

A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. A) How much work is being done to hold the beam in place? B) How much work was done to lift the beam?

If Light is shone through the slits of a card onto a sheet of white paper describe what is seen.

When you break a magnet in half, how many poles does each piece have? Explain.

What can you use to unscrew a tiny screw?

What shoreline feature would develop if the global sea level were to rise considerably