Light travels at a speed of 299,792,458 m/s. The planet Uranus is 30,430,000,000,000 meters from Earth. What is a good estimate of the amount of time it takes for light to travel from Earth to Uranus?

a.)about 10000 seconds

b.)about 1000 seconds

c.)about 13000 seconds

d.)about 1300 seconds

Question

Light travels at a speed of 299,792,458 m/s.  The planet Uranus is 30,430,000,000,000 meters from Earth. What is a good estimate of the amount of time it takes for light to travel from Earth to Uranus?

a.)about 10000 seconds

b.)about 1000 seconds

c.)about 13000 seconds

d.)about 1300 seconds

anonymous · Answer

Simply cancel out the units and solve.
$$30430000000000 meters \div(299792458 meters/second)=101503.5541 seconds$$  Meters cancels out and you get seconds. ANSWER:A