This diagram shows how light from a binary star system would travel to Earth if the speed of light were not constant. What is its observational significance?
A) It tells us that if the speed of light were not the same for everyone, then we would not necessarily see binary stars as distinct objects.
B) It shows that time runs slower for fast-moving objects.
C) It shows that motion is relative.
D) It shows that observers in different reference frames will not necessarily agree when two events are simultaneous.
A) It tells us that if the speed of light were not the same for everyone, then we would not necessarily see binary stars as distinct objects.
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A 4.00-liter container is divided into two equal parts, one part containing 0.0100 mole of neon, and the other part containing 0.0100 mole of helium. The divider is removed and the gases mix. What is the change in entropy (in J/K) of this system?
a. 0.0576 b. 0.115 c. 0.173 d. 0.0864 e. 0.144
Compared to the volume of its nucleus, the volume of an atom is about
A) the same. B) a thousand times greater. C) a million times greater. D) a billion times greater. E) a trillion times greater.
A weather balloon containing 2.0 m3 of hydrogen gas rises from a location at which the temperature is 22°C and the pressure is 101 kPa to a location where the temperature is -39°C and the pressure is 20 kPa
If the balloon is free to expand so that the pressure of the gas inside is equal to the ambient pressure, what is the new volume of the balloon? A) 4.0 m3 B) 6.0 m3 C) 8.0 m3 D) 10 m3 E) 12 m3
Steam is heated from 4 MPa, 480ºC to 4 MPa, 640ºC. Determine the heat added to the steam per unit mass.
What will be an ideal response?