Question

4. The daily output of energy from the sun is 7.80 x 1027 kcal. Convert this energy to

joules (J) & write the answer in scientific notation.

Answer 1

The answer to your question is: 3.276 x 10³¹ Joules

Step-by-step explanation:

Energy from the sun: 7.80 x 10²⁷ kcal

Look for the factor to convert units

Rule of three to convert units

1 cal ---------------------- 4.2 Joules

1000 cal --------------------- x

x = (1000 x 4.2) / 1 = 4200 Joules

1 kcal ---------------- 4200 Joules

7.8 x 10²⁷ kcal ------- x

x = (7.8 x 10²⁷ x 4200) / 1 = 3.276 x 10³¹ Joules