To find how much heavier a grain of rice is compared to a strand of hair, we need to subtract the mass of the strand of hair from the mass of the grain of rice.
The mass of a grain of rice is 0.002 ounces, and the mass of a strand of hair is 2.17×10^-5 ounces.
We subtract the mass of the hair strand from the mass of the grain of rice: 0.002 - 2.17×10^-5 = 0.00199783
The result is a number close to 0.002, but not exactly. To express this number in scientific notation, we can write it as 1.99783×10^-3.
Therefore, a grain of rice is approximately 1.99783×10^-3 ounces heavier than a strand of hair.
A strand of hair has an average mass of 2.17×10^-5 ounces. A grain of rice has an average mass of 0.002 ounces. How much heavier is a grain of rice than a strand of hair? Express your answer in scientific notation.
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