Assume that Hubble's constant is 22 kilometers per second per million light-years. Then we would expect a galaxy 100 million light-years away to be moving (Assume the motion is due only to Hubble's law.)
A) away from us at 2,200 km/s
B) away from us at 220 km/s
C) toward us at 2,200 km/s
D) away from us at 22,000 km/s
A) away from us at 2,200 km/s
You might also like to view...
The Viking spacecraft searched for life on Mars by looking for the effects of life on the upper atmosphere
a. True b. False Indicate whether the statement is true or false
A potential energy function for a certain system is given by U1(x) = Cx2 + Bx3
The potential energy function for a second system is given by U2(x) = A + Cx2 + Bx3, where A is a positive quantity. How does the force on system 1 relate to the force in system 2 at a given position? A) The force in the two systems will be in opposite directions. B) The force is identical in the two systems. C) The force in the second system will be with less than the force in the first system. D) There is no relationship between the force in the two systems. E) The force in the second system will be with greater than the force in the first system.
Wave Characteristics: How far does light travel in 1.0 ?s? (c = 3.0 × 108 m/s)
A. 3.0 × 1014 m B. 0.30 km C. 3.0 m D. 30 cm
The idea of inflation makes one clear prediction that, until the discovery of an accelerating expansion, seemed to contradict the available observations. What is this prediction?
A) Inflation predicts that the early universe should have regions of enhanced density that could have acted as "seeds" for the formation of galaxies and large structures. B) The universe should be geometrically "flat" (in the four dimensions of spacetime). C) Inflation predicts that the temperature of the cosmic microwave background should be almost (but not exactly) the same everywhere. D) Inflation predicts that the entire universe must be far larger than the observable universe.