As you ascend in elevation, the air generally becomes
A) warm and heavy.
B) warm and less dense.
C) cool and heavy.
D) cool and less dense.
Answer: D
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An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?
a.
straight north
b.
straight east
c.
straight south
d.
straight west
e.
straight up, directly overhead
An Earth satellite is in an elliptical orbit. The satellite travels faster when it is
A) nearest Earth B) farthest from Earth C) constant speed everywhere in orbit and in close orbit travels faster when orbiting 4) the Moon. 5) Earth. 6) both about the same for the same altitudes.
The spectral lines of a star indicate ionized helium is prominent, yet the star appears orange in color. Explain the problem with this and offer an explanation
What will be an ideal response?
What is the characteristic that distinguishes fermions from bosons?
A) their mass B) their electric charge C) their spin D) their size E) their speed of travel