A gas maintains constant temperature, but experiences both a change in its pressure and in its volume. What happens to its internal energy?
1.The internal energy decreases.
2.The internal energy increases.
3.The internal energy remains constant.
4.It cannot be determined whether it will increase, decrease, or remain the same.
3
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a. Within Earth's core b. Within Earth's ozone layer c. Within Earth's magnetosphere d. Within Earth's mantle e. Within Earth's subduction zones
What part of the Apollo spacecraft actually returned to Earth?
a. descent rocket b. lunar module c. rocket boosters d. command module e. support stage
Most large galaxies in the universe are
A) elliptical. B) spiral or lenticular. C) irregular. D) abnormal.
A _____ is an electronic device consisting of a large array of light-sensitive elements used to record very faint images
A) photometer B) charge-coupled device C) spectrograph D) photographic plate