By how many newtons does the weight of a 100-kg person change when he goes from sea level to an altitude of 5.0 km if we neglect the earth's rotational effects? (The mean radius of the Earth is 6.38 × 106 m, G = 6.67 × 10-11 N • m2/kg2.)
A) -0.60 N
B) -1.5 N
C) -2.6 N
D) -3.6 N
E) -5.2 N
B
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Radioactive Decay: Rutherfordium-261 has a half-life of 1.08 min. What is the decay constant of rutherfordium-261 in terms of seconds?
A. 0.0107 s-1 B. 0.0154 s-1 C. 1.87 s-1 D. 2.91 s-1 E. 0.344 s-1
Applications to Astronomy: The cosmic background radiation corresponds to a temperature of about
A. 1.4 K. B. 2.7 K. C. 8.0 K. D. 20 K.
The lunar mare are found:
A) anywhere large meteor impacts created deep basins. B) almost entirely on the far side, which was more likely to be hit. C) almost entirely on Earth side, where the crust was thinner. D) mainly in the south polar region, where the largest impact occurred. E) not at all, since no liquid water really exists on the Moon.
A car decelerates uniformly and comes to a stop after 10 s. The car's average velocity during deceleration was 50 km/h. What was the car's deceleration while slowing down?
A) 10 km/h-s B) 5 km/h-s C) 9.8 m/s2 D) 8 km/h-s E) 4 km/h-s