Which of these has the greatest number of protons in its nucleus?
A) gold
B) mercury
C) lead
D) silver
Answer: C
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Which stars always have large positive absolute magnitude?
a. Stars of high luminosity. b. Stars of low luminosity. c. Nearby stars. d. Distant stars. e. Not enough information given.
Cassini is the name of:
A) the French astronomer who first discovered a gap in Saturn's rings. B) a gap in the rings created by a resonance with Mimas. C) NASA's orbiter now taking photos of Saturn. D) All of the above. E) None of the above.
The constant G that appears in the equation F = Gm1m2/r2 is
a. smaller on the Moon than on Earth. b. the force of gravity. c. equal to 9.8 m/s2. d. the acceleration due to gravity. e. equal to 6.67 × 10^-11 Nm2/kg2.
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