Standard form questions

Question

1. The mean distance of the Earth from the Sun is approximately 92,000,000 miles. Write this down in standard form.
2. The temperature at the centre of The Sun is 1.5 x 107 °C. Write this as an ordinary number.
3. The average adult human male has a lung capacity of 6 litres. If the average number of oxygen molecules 5.64 x 1021 per litre, what is the total number of oxygen molecules in an average adult male’s lungs? Write your answer in standard form.

Answer 1

(1)

92,000,000 = 9.2 x 10⁷

(2)

1.5 x 10⁷ = 15,000,000

(3)

6 x 5.64 x 10²¹ = 3.384 x 10²²