One result of bombardment of the Moon's surface is a layer of broken, pulverized, and powdered rock called
A. regolith.
B. maria.
C. lunar rays.
D. basalt.
Answer: A
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To observe a visual binary, we must measure radial velocities
a. True b. False Indicate whether the statement is true or false
The term "timbre" refers to which of the following?
a. Any musical instrument made primarily of wood. b. The quality of sound from instruments due to the mixture of harmonics. c. Instruments that have valves. d. An instrument made in France.
Fraud in science is rare because it is difficult to commit. Why is it difficult to commit fraud in science?
a. Science requires that experimental and theoretical findings be reproducible. b. All scientists are bound by a code of ethics preventing them from publishing fraudulent work. c. Scientific results are reviewed by other scientists before they are published. d. Scientific journals only allow certain highly trusted individuals to publish their work. e. Science requires that experimental and theoretical findings be reproducible and scientific results are reviewed by other scientists before they are published.
A car travels around an unbanked highway curve (radius 0.15 km) at a constant speed of 25 m/s. What is the magnitude of the resultant force acting on the driver, who weighs 0.80 kN?
a. 0.87 kN b. 0.34 kN c. 0.80 kN d. 0.00 kN e. 0.67 kN