Why do liquids solidefy?

Can the sum of the magnitudes of two vectors ever be equal to the magnitude of the sum of the same two vectors? If no, why not? If yes, when?

Hydroelectric energy is based on the blank energy of water being converted to blank energy as waterfalls and pushes against the turbine

Two runners ran side by side each holding one end of a horizontal pole. What would most likely happen if one of the runners began jogging in knee-deep water?

On his fishing trip Taylor takes the boat 12 km south. The fish aren't biting so he goes 4 km west. He follows a school of fish 1 km north. What distance did he cover? What was his displacement (magnitude and direction) ?

What was the total weight (lbf) of chocolate in the vat? the specific gravity of chocolate is approximately 1.24?

What kind of movement does the heat within the core and mantle directly generate?

Explain why Newton's first law of motion can be difficult to observe in moving objects?

No force is necessary to

A boat has a mass of 4040 kg. Its engines generate a drive force of 4660 N due west, while the wind exerts a force of 880 N due east and the water exerts a resistive force of 1400 N due east. Take west to be the positive direction.

Define the word projectile