If the universe is closed, then its age will be
a. less than two-thirds of 1/H.
b. more than two-thirds of 1/H.
c. equal to 1/H.
d. equal to H squared.
e. equal to the square-root of H.
A
You might also like to view...
If a lunar astronaut wanted to know the quantity of matter in a moon rock that he had collected would he want to know its mass or weight?Explain.
What will be an ideal response?
Two point charges, one q and the other –q, form a dipole separated by a distance d. A third charge Q is placed midway between these two charges. If the distance between q and –q is then doubled with the Q staying midway between the other two, what happens to the force on Q?
a. It halves. b. It reduces by a factor of 8. c. It stays the same. d. It quarters.
A 14-cm diameter champagne bottle rests on its side on top of a frictionless horizontal table. Suddenly, the cork pops and the bottle slides backward, covering a distance of 22cm in 0.44s
If the mass of the bottle is 500 times the mass of the cork, find the distance from the original position that the cork will land on the table. Neglect air resistance and assume that the cork is very small compared to the bottle. A) 3,000 cm B) 60 m C) 85 m D) 8.5 cm
The diameter of an average nucleus is about
a. 10^-5 m. b. 10^-7 m. c. 10^-10 m. d. 10^-14 m.