How do you find the mass of an apple?

Mass of an Apple

What a tricky question! You can easily measure the WEIGHT of an apple... or the downward force the MASS of the apple excerts in it's gravitational field on earth.

Weight is a very good approximation of MASS... but to determine EXACT mass is something you'd not be able to do in the "backyard."

Weight and mass are considered equivilent on the earth's surface. That is something that weighs 1 kilogram on earth has one kilogram of mass. It will only weigh 160 grams on the moon but will still have 1 kilogram of mass. To estimate the mass of an apple without a scale is to see how much water it displaces.