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.
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.
To find out how much heavier a grain of rice is compared to a strand of hair, we need to subtract the mass of a strand of hair from the mass of a grain of rice.
Given:
Mass of a strand of hair = 2.17 × 10^-5 ounces
Mass of a grain of rice = 0.002 ounces
To perform the subtraction:
0.002 ounces - 2.17 × 10^-5 ounces
To subtract these quantities, we need to convert the mass of a strand of hair to the same unit as the mass of a grain of rice (ounce).
2.17 × 10^-5 ounces = 2.17 × 10^-5 ounces
Now we can perform the subtraction:
0.002 ounces - 2.17 × 10^-5 ounces = 0.002 - 2.17 × 10^-5 ounces
To subtract these values, we need to align the numbers in scientific notation:
0.002 - 2.17 × 10^-5 = 0.00199983
Therefore, a grain of rice is approximately 0.00199983 ounces heavier than a strand of hair.
Expressed in scientific notation, this is approximately 2.0 × 10^-3 ounces heavier.
To find out how much heavier a grain of rice is than a strand of hair, we can subtract the mass of the hair from the mass of the 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.
Subtracting the mass of the hair from the mass of the rice:
0.002 ounces - 2.17×10^-5 ounces
To subtract these two values, we need to convert the mass of the hair to match the units of the rice.
2.17×10^-5 ounces is the same as 0.0000217 ounces (move the decimal point five places to the right).
So now we can subtract the two values:
0.002 ounces - 0.0000217 ounces
Calculating this:
0.0019783 ounces
The difference, or how much heavier the rice is than the hair, is 0.0019783 ounces.
Expressing this in scientific notation:
1.9783×10^-3 ounces.