In relativity, two people share the same reference frame only if they
A) are not moving relative to one another.
B) are both located in the same place.
C) are both located in the same place and are stationary.
D) agree on the laws of nature.
A) are not moving relative to one another.
You might also like to view...
What is the goal of comparative planetology?
A) to use planetary positions to foretell the future B) to find which planets will be most suitable for future colonization C) to help plan future visits by unmanned probes, orbiters, and rovers D) to determine the origin and evolution of the solar system E) to find out how our own solar system compares with extrasolar ones
Energy and Mass: A 1.0-kg aluminum ingot is heated from 0°C to 100°C. By what amount does its mass change? The specific heat of aluminum is 900 J/kg ? K. (c = 3.0 × 108 m/s)
A. Its mass does not change. B. Its mass increases by 0.50 × 10-12 kg C. Its mass decreases by 0.50 × 10-12 kg D. Its mass increases by 1.0 × 10-12 kg E. Its mass decreases by 1.0 × 10-12 kg
You see two main-sequence stars with the same spectral type. Star 1 is dimmer in apparent brightness than Star 2 by a factor of 100. What can you conclude, assuming there is no absorption of either star's light by interstellar gas or dust?
A) Without first knowing the distances to these stars, you cannot draw any conclusions about how their true luminosities compare to each other. B) The luminosity of Star 1 is a factor of 100 less than the luminosity of Star 2. C) Star 1 is 10 times more distant than Star 2. D) Star 1 is 100 times more distant than Star 2. E) Star 1 is 100 times nearer than Star 2.
A way to measure the hardenability is the _________end quench test.
Fill in the blank(s) with the appropriate word(s).