Distinguish between pressure and density. How are they related to each other?
What will be an ideal response?
Pressure is a measure of the force that matter exerts on its surface area (i.e. in2). Density is a measure of the amount of matter in a given volume (i.e. cm3). A very low-density gas and a very high-density gas might have the same pressure if they have different temperatures.
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Two planets in space gravitationally attract each other. If both the masses and distances are doubled, the force between them is
A) one-quarter. B) half as much. C) twice as much. D) four times as much. E) none of the above
Thermal energy is measured in
A) calories. B) Calories. C) joules. D) any or all of the above for special cases
Water is good for putting out fires because it has a very high latent heat of vaporization
Indicate whether the statement is true or false
The original substances in a chemical reaction are called the ______________
Fill in the blank(s) with correct word