The observation that materials expand in size with an increase in temperature can be applied to what proportion of existing substances?
a. 100%
c. few
b. most
d. none
B
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Ypsilanti, Michigan, is located at latitude 42 degrees North. What is the altitude (above the southern horizon) of the Sun at solar noon on the summer solstice?
A. 132 degrees B. 108.5 degrees C. 71.5 degrees D. 42 degrees E. 23.5 degrees
Star A and star B both have an apparent magnitude of 4.0, but star A has an absolute magnitude of 1.0 and star B has an absolute magnitude of 7.0. Which statement below is correct?
A) Star A appears brighter than star B, but actually star B and star A are the same brightness. B) Star B appears brighter than star A, but actually star B and star A are the same brightness. C) Star A and star B appear to have the same brightness, but actually star B is brighter than star A. D) Star A and star B appear to have the same brightness, but actually star A is brighter than star B. E) It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.
Which of the following is a contribution to astronomy made by Galileo?
A) The astronomical telescope can show us far more detail than the eye can. B) Jupiter has four moons orbiting it. C) The Moon has craters, mountain, valleys, and dark flat areas on its surface. D) Venus appears almost fully lit when it lies on the far side of the Sun. E) all of the above
A moderate force will break an egg. However, an egg dropped on the road usually breaks, while one dropped on the grass usually doesn't break. This is because for the egg dropped on the grass:
a. the change in momentum is greater. c. the time interval for stopping is greater. b. the change in momentum is less. d. the time interval for stopping is less.