The Energy That Heats Earth Is Caused by Nuclear Reactions $1.5 ^ { \times } 10 ^ { 11 } \mathrm {~m}$

question 1

Short Answer

The energy that heats Earth is caused by nuclear reactions and explosions on the surface of the Sun, sometimes called "solar flares." When a solar flare occurs, how long does it take before
you see it? (The Earth-Sun distance is $1.5 ^ { \times } 10 ^ { 11 } \mathrm {~m}$ and the speed of light is approximately $3 ^ { \times } 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ ).
a. 8 microseconds
b. 8 milliseconds
c. 8 seconds
d. 8 minutes

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