Based on the H-R diagram shown above, what is the approximate surface temperature of an F star?
A) 5000 K
B) 6000 K
C) 7000 K
D) 12,000 K
C) 7000 K
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Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (A), the distance Albert can throw a small rock. One albert is How many square alberts is equal to one acre? (1 acre = 43,560 ft2 = 4050 m2)
What will be an ideal response?
While the gondola is rising at a speed of 5.0 m/s, a passenger in a balloon-supported gondola throws a small ball up at a speed of 2.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is
a. 2.0 m/s, up. b. 2.8 m/s, down. c. 3.0 m/s, up. d. 5.0 m/s, up. e. 7.0 m/s, up.
Which of the following expands most when temperature is increased?
1) iron 2) ice water 3) helium 4) all expand the same Which of the following expands most when temperature is decreased? 5) iron 6) ice water 7) helium 8) all expand the same
Which is a unique characteristic of Venus not shared by the other Terrestrial planets? a. The planet has an atmosphere
b. The planet has volcanoes on its surface. c. The planet experiences retrograde rotation. d. The planet has a strong magnetic field. e. The planet once had water on its surface.