Approximately what percentage of mass-energy of infalling matter can be converted to thermal energy when the matter is falling into a supermassive black hole?
A) about the same as that converted by hydrogen fusion
B) much less than that converted by hydrogen fusion
C) much more that converted by hydrogen fusion
C) much more that converted by hydrogen fusion
You might also like to view...
Does a high-speed bullet's path bend more than a light beam bends as it passes near Earth?
A) Yes, because the bullet is heavier than the light beam. B) Yes, because the light beam has a greater acceleration that the bullet. C) Yes, because the bullet moves slower than the light beam. D) No, because all falling objects accelerate at the same rate. E) No, because of Einstein's equivalence principle.
While air freight is energy inefficient, aircraft carry the greatest amount of freight
What will be an ideal response?
The threshold of hearing is _______.
a. 0 dB. b. 180 dB. c. 200 dB. d. 70 dB. e. 1 dB.
An 8000-kg aluminum flagpole 100-m high is heated by the Sun from a temperature of 10°C to 20°C. Find the increase in internal energy (in J) of the aluminum. (The coefficient of linear expansion is 24 × 10^?6 (°C)?1, the density is 2.7 × 10^3 kg/m3, and the specific heat of aluminum is 0.215 cal/g/°C.)
a. 7.2 × 10^5 b. 7.2 × 10^7 c. 7.2 × 10^3 d. 7.2 × 10^1 e. 7.2 × 10^2