Which of the following stars is hottest?
A. G
B. F
C. M
D. O
E. B
Answer: D
Physics & Space Science
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Meredith sits in the middle of a merry-go-round that her brother Kiel is pushing. If Meredith moves to the outer edge of the merry-go-round, it will
A. speed up. B. slow down. C. spin at the same rate.
Physics & Space Science
The oldest fossil records date back about
a) 100 years. b) 6 thousand years. c) 2 million years. d) 3500 million years.
Physics & Space Science
If the Sun were twice as massive
A) its pull on the Earth would double. B) Earth's pull on the Sun would double. C) both of these D) none of the above
Physics & Space Science
Of the following systems, which contains the most heat?
a. 100 kg of water at 80°C c. 600 kg of ice at 0°C b. 250 kg of water at 40°C d. Systems do not contain heat.
Physics & Space Science