contestada

1. If some unimaginable calamity destroyed the Sun, using the astronomical unit for the Earth-Sun distance and the value for the speed of light above, how long would we still have light after the Sun ceased to exist? (5)

Respuesta :

GunnerGasconade

Answer:

8 minutes and 20 seconds

Explanation:

Average Distance between Earth and Sun: 150 million km   = [tex]1.5 * 10^{8}[/tex] km

Velocity of light: [tex]3 * 10^{8} \ m/s = 3 * 10^{5} \ km/s[/tex]

Time = Distance/Speed

or Time = [tex]1.5 * 10^{8} \ km[/tex] / [tex]3 * 10^{5} \ km/s[/tex]

= 5 * 100

= 500 seconds

⇒ Time = 8 minutes and 20 seconds