A strand of hair has an average mass of 2.17x10^-5 ounces. A grain of rice has an average mass of 0.002 ounces. How much heavier is a grain lf rice than a strand of hair? Express your answer in scientific notation.
To find the difference in mass between a grain of rice and a strand of hair, we subtract the mass of the hair from the mass of the rice: 0.002 ounces - 2.17x10^-5 ounces = 0.0019823 ounces. This can be written in scientific notation as 1.9823x10^-3 ounces.
To find out how much heavier a grain of rice is than a strand of hair, we need to subtract the mass of the hair from the mass of the rice.
The mass of the hair is 2.17x10^-5 ounces.
The mass of the rice is 0.002 ounces.
To subtract the mass of the hair from the mass of the rice, we can write it as an equation:
0.002 ounces - 2.17x10^-5 ounces = ?
To subtract these two numbers, we need to make sure the exponents are the same. Let's convert 0.002 to scientific notation:
0.002 ounces = 2x10^-3 ounces
Now we can subtract:
2x10^-3 ounces - 2.17x10^-5 ounces = ?
To subtract, we simply subtract the coefficients and keep the same exponent:
2 - 2.17 = -0.17
The result in scientific notation is:
-1.7x10^-1 ounces
Therefore, a grain of rice is 1.7x10^-1 ounces, or 0.17 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 the hair from the mass of the rice.
Given that the average mass of a strand of hair is 2.17x10^-5 ounces and the average mass of a grain of rice is 0.002 ounces, we can perform the subtraction as follows:
0.002 ounces - 2.17x10^-5 ounces
To subtract these values, we need to convert the mass of the hair to the same units as the mass of the rice. Since both values are in ounces, we do not need to perform any conversions.
The subtraction of the two values is as follows:
0.002 ounces - 2.17x10^-5 ounces = 0.002 - 0.0000217 = 0.0019783 ounces
The result of the subtraction is 0.0019783 ounces. However, we need to express this value in scientific notation, also known as standard form.
In scientific notation, we have a number between 1 and 10 multiplied by a power of 10. To express 0.0019783 in scientific notation, we can rewrite the number as 1.9783 multiplied by 10^-3, making the number between 1 and 10.
Therefore, the final answer, expressed in scientific notation, is:
1.9783 x 10^-3