On average, active galaxies are rare and most are fairly distant from us
Indicate whether the statement is true or false
TRUE
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Which is the longest time?
a) the time it takes for a photon to pass through the radiative zoneof the Sun b) the time it takes a photon to pass through the corona of the Sun c) one hour d) the time it takes a photon to pass from the photosphere of the Sun to the Earth e) the time it take light to traverse the convective zone of the Sun
Consider a small satellite moving in a circular orbit (radius r) about a spherical planet (mass M). The period does not depend upon
A) g at the satellite position. B) the planet mass. C) the satellite mass. D) the radius r. E) the universal gravitational constant.
Event 2 occurs a time â^†t after event 1. If event 2 was caused by event 1, which of the following must be true?
A. The distance between event 1 and event 2 can be any amount. B. The distance between event 1 and event 2 is not more than c â^†t. C. There are frames of reference in which event 2 is before event 1. D. There are frames of reference in which event 1 is not related to event 2. E. All of these choices are false.
Describe the Carnot cycle
What will be an ideal response?