If light takes 8 minutes to travel from the sun to Earth and over 4 hours to travel from the sun to the planet Neptune, what is the distance from the sun to Neptune?
a. 5 AU
b. 30 AU
c. 30 ly
d. 5 ly
e. 0.6 ly
B
Physics & Space Science
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A spherically symmetric planet has four times the earth's mass and twice its radius. If a jar of peanut butter weighs 12 N on the surface of the Earth, how much would it weigh on the surface of this planet?
A) 3.0 N B) 6.0 N C) 12 N D) 24 N E) 36 N
Physics & Space Science
What modern-day instrument do astronomers use to record images from telescopes?
a. photometer b. grating device c. spectrograph d. photographic plate e. charge coupled device
Physics & Space Science
The gravitational field at the earth due to the moon is (the mass of the moon is 
kg and separated by a distance of 
A. 
B. 
C. 
D. 
E. 
Physics & Space Science
Three 6.0-? resistors are connected in parallel. What is their equivalent resistance?
a. 0.083 ? b. 3.0 ? c. 0.50 ? d. 2.0 ? e. 6.0 ?
Physics & Space Science