The following data are to be expressed in proper scientific notation and compared
PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
The following data are to be expressed in proper scientific notation and compared.
(i) The mass of the Earth is 5972000000000000000000000kg. Express the mass retaining four significant figures.
(ii) The mass of an electron is 0.000000000000000000000000000911kg. Express this mass retaining three significant figures.
(iii) Using your answers to parts (i) and (ii), determine the ratio of the mass of the Earth to the mass of an electron. Give the ratio in scientific notation correct to two significant figures.