One light-year is approximately
A) the distance from the Sun to Earth.
B) the speed at which Earth orbits the Sun.
C) 10 trillion kilometers.
D) the same as one regular year.
C) 10 trillion kilometers.
You might also like to view...
____________ is the separation of material in a newly formed planet or asteroid according to density. This happens when the object becomes molten
a. Accretion b. Differentiation c. Condensation d. Outgassing e. Sublimation
Dimensional Analysis: The position, x, of an object is given by the equation x = A + Bt + Ct2, where t refers to time. What are the dimensions of A, B, and C?
A. distance, distance, distance B. time, time, time C. distance, time, time2 D. distance, distance/time, distance/time2 E. distance/time, distance/time2, distance/time3
On a calm day (no wind), you can run a 1500-m race at a velocity of 4.0 m/s. If you ran the same race on a day when you had a constant tailwind of 2.0 m/s, the time it would take you to finish would be
A) 250 s. B) 9000 s. C) 1125 s. D) 750 s. E) 500. s.
Briefly explain why an expanding universe implies a beginning (called a Big Bang)
What will be an ideal response?