Approximately how long does it take light to reach the Earth from the Sun?

a. 1 min
b. 8 min
c. 1 ly
d. 8 ly
e. 1 AU


b

Physics & Space Science

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An ideal gas is allowed to expand adiabatically. Assume the process is reversible. The change in entropy is

a. 0 b. nR ln (V2/V1) c. nR ln (T2/T1) d. kn ln (V2/V1) e. kn ln (T2/T1)

Physics & Space Science

Areas always have dimensions ____ while volumes always have dimensions ____

a. m2, m3 b. L2, L3 c. Both a and b are correct. d. No answer is correct because of the "always."

Physics & Space Science

If the primary of a transformer is connected to a dc power source, the transformer would have a voltage output

A) at a higher efficiency than with an ac source. B) the same. C) that is also dc. D) only while being connected or disconnected. E) none of the above

Physics & Space Science

A coulomb is the same as:

A) an ampere/second B) half an ampere ? second2 C) an ampere/meter2 D) an ampere ?second E) a newton ?meter2

Physics & Space Science