Author Question: One light-hour is the distance light travels in one hour. The speed of light is about 300,000 km/s . ... (Read 181 times)

ahriuashd · **on:** Jul 27, 2018

One light-hour is the distance light travels in one hour. The speed of light is about 300,000 km/s . How far is 1 light-hour?

A) 300 thousand km (300,000, or 3 105 km)
B) 1.08 billion km (1,080,000,000, or 1.08 109 km)
C) 18 million km (18,000,000, or 1.8 107 km)
D) 9.46 trillion km (9,460,000,000,000, or 9.46 1012 km)

Question 2

The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. In this equation, what does G represent?

A) the distance between the two objects
B) the universal gravitational constant
C) the density of the smaller object