When a solid melts
a. the temperature of the substance increases.
b. the temperature of the substance decreases.
c. heat energy leaves the substance.
d. heat energy enters the substance.?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring