Question

The sun generates about 4×1026 joules of energy every second. There are about 3.15×107 seconds in a year. About how many joules of energy does the sun generate in a year? Write the answer in scientific notation. Express the answer to the exact decimal place.
joules

Answer 1

To find the number of joules of energy the sun generates in a year, we can multiply the energy generated per second by the number of seconds in a year:

4×10^26 joules/second x 3.15×10^7 seconds/year = (4 × 3.15) × (10^26 × 10^7) joules = 12.6 × 10^33 joules

The answer in scientific notation is 1.26 × 10^34 joules.