Wood floats in water, 1 gram is defined as the mass of 1 cubic centimeter of water, a cubic centimeter of quartz weighs ~2.65 g and a cubic centimeter of galena weighs about 7.5 g. The density of these materials from highest to lowest is ________
A) galena, quartz, wood, water B) water, wood, quartz, galena
C) wood, quartz, galena, water D) galena, quartz, water, wood
D
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Which of the following would happen to the atmospheric pressure at the ground if the Earth's gravitational force were to increase?
A. It would remain the same. B. It would cause the atmosphere to expand vertically. C. It would increase. D. It would decrease.
The air inside a room is at a temperature of 70°F and has a mixing ratio of 7.6 g/kg. If the room temperature decreases by 10°F per hour, how many hours will it take for the air to reach saturation?
What will be an ideal response? _______ hours
Chlorofluorocarbons (CFCs): a. have never been very abundant
b. bind oxygen atoms together creating ozone. c. do no harm to the atmosphere. d. contain chlorine atoms that can destroy ozone (O3) by converting it to oxygen (O2).
In most energy conversions, such as burning coal to produce heat,
A) entropy increases because of heat released in the conversion. B) entropy decreases because of heat released in the conversion. C) entropy is unchanged because heat is used to ignite the coal. D) entropy decreases because heat is used to ignite the coal.