CHEMISTRY ANSWER!!!!

Question

The distance from the sun to the earth is 1.50 x 10^8 km. The speed of light is 3.00 x10 ^8m/s. How many round trips between Earth and the sun could a beam of light make in one day?

Answer 1

Convert 3.00x10⁸ m/s to km/s:

3.00x10⁸ m/s x 1 km / 1000 m= 3.00x10⁵ km/s

Convert this to km / hr:

3.00x10⁵ km/s x 3600 s / hr = 1.08x10⁹ km / hr

Convert this to km / day:

1.08x10⁹ km / hr x 24 hr / day = 2.59x10¹⁰ km / day = speed of light per day

One way trip to the sun = 1.50x10⁸ km

Round trip = 2 x 1.50x10⁸ km = 3.0x10⁸ km

Number of round trips per day = 1 rnd trip / 3x10⁸ km x 2.59x10¹⁰ km / day = 87 round trips / day