Which of these is a covalent bond. a. LiCl b. Alcl3 c. Na2S d. NO2

A theory that explains and predicts behavior is useful for?

Which of the following accurately describes the effects of temperature changes on solids? A. If the temperature of a solid is decreased, the solid expands and its volume decreases. B.

A worker pushes a box in a factory. In each case, decide which force has the greater magnitude: the force exerted by the worker on the box or the force exerted by the box on the worker.

What do waves carry?

Nobody is at perfect rest. Explain

Select the statement that is true regarding scientific theories. A. Scientific theories are what laws are called before they are proven. B. Scientific theories attempt to explain why natural events occur. C.

If the temperature of the air in a certain region is increased by heating from the sun, does the air pressure at the ground increase or decrease?

What is a step up transformer

What is the thickness of a human hair?

If you take a bar magnet with both n & s poles and cut it in half, you get