It is the day of the Summer Solstice. You notice that for you the Sun never sets. Who are you?
a) a macaw in the South American rain forest
b) a penguin below the antarctic circle
c) a polar bear above the arctic circle
c) a polar bear above the arctic circle
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Consider a child who is swinging. As she reaches the lowest point in her swing:
a. the tension in the rope is equal to her weight. b. the tension in the rope is equal to her mass times her acceleration. c. her acceleration is downward at 9.8 m/s2. d. none of the above.
At what frequency does an object with a temperature of 1000 K radiate the most power?
A) 1.0 × 1014 Hz B) 8.0 × 1014 Hz C) 2.3 × 1012 Hz D) 6.7 × 1013 Hz E) 4.1 × 1011 Hz
If the distance between two asteroids is doubled, the gravitational force they exert on each other will:
A) also be doubled. B) be half as great. C) be one fourth as great. D) be 1/16 as great. E) be four times greater.
The mineral calcite comes from what type of non-
silicate mineral group? a) oxide minerals b) sulfide minerals c) carbonate minerals d) feldspar minerals