The starship Enterprise locks onto an alien ship (whose mass is much greater than the Enterprise's mass) with its tractor beam (think of this as a futuristic rope) and starts to pull the alien ship toward it. Neither ship has its propulsion engines running. Which ship has greater acceleration towards the other?
A. They both move with equal acceleration
B. The alien ship
C. The Enterprise
D. Neither ship can move because there is no friction in outer space
Answer: C
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Sunspots are dark splotches on the Sun. Which statement is true?
A) They are hotter than the surrounding areas of the Sun. B) They are extremely cold objects, as cold as Pluto. C) They are extremely hot, but cooler than the surrounding areas of the Sun. D) They are solid bodies floating on the surface of the Sun. E) They are associated with areas of very low magnetic fields.
The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T
What is the intensity of the wave? (c = 3.0 x 108 m/s, c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 1.0 × 10-13 W/m2 B) 1.5 × 10-5 W/m2 C) 3.0 × 10-5 W/m2 D) 2.0 × 10-13 W/m2 E) 7.5 × 105 W/m2
When we say that jovian planets contain significant amounts of hydrogen compounds except, we mean all the following chemicals except
A) carbon dioxide. B) water. C) ammonia. D) methane.
Process of Science: Given that Einstein's equations naturally showed the possibility of an accelerating Universe, why have astronomers only recently found strong evidence for dark energy?
What will be an ideal response?