Answer to Question #270619 in Physics for Alice Hart

Question

La luz proviene del sol, tarda 8.3 minutos en llegar a la a tierra. La rapidez de la luz es de 3.00EE8 m/s. ¿A cuántos kilómetros de distancia está la tierra?

English translation:

The light comes from the sun, it takes 8.3 minutes to reach the ground. The speed of light is 3.00EE8 m / s. How many kilometers away is the earth?

Answer 1

The distance is

$$d=ct=(3·10^8)(8.3·60)=1.49·10^{11}\text{ m},\\$$

or 149,000,000 km.