a strand of hair has an average mass of 2.17 x 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.
____ x ____ ounces
To find the difference in weight between a grain of rice and a strand of hair, we can subtract their respective masses:
0.002 ounces - 2.17 x 10^-5 ounces
To simplify the expression, we can convert the mass of the grain of rice to scientific notation:
0.002 ounces = 2 x 10^-3 ounces
Now we can subtract the masses:
2 x 10^-3 ounces - 2.17 x 10^-5 ounces
Performing the subtraction, we get:
1.99983 x 10^-3 ounces
Therefore, a grain of rice is approximately 1.99983 x 10^-3 ounces heavier than a strand of hair.
To find out how much heavier a grain of rice is than a strand of hair, we subtract the mass of a strand of hair from the mass of a grain of rice.
Mass of grain of rice = 0.002 ounces
Mass of strand of hair = 2.17 x 10^-5 ounces
Now, subtract the mass of the strand of hair from the mass of the grain of rice:
0.002 ounces - 2.17 x 10^-5 ounces
To perform this subtraction, we need to convert the mass of the grain of rice to scientific notation:
0.002 ounces = 2.0 x 10^-3 ounces
Now we can subtract:
(2.0 x 10^-3 ounces) - (2.17 x 10^-5 ounces)
To subtract these two values, they need to have the same exponent. Let's convert the second value to have an exponent of -3:
(2.0 x 10^-3 ounces) - (0.0217 x 10^-3 ounces)
Now, subtracting the values:
2.0 x 10^-3 ounces - 0.0217 x 10^-3 ounces = 1.9783 x 10^-3 ounces
So, a grain of rice is approximately 1.9783 x 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 can subtract the mass of the hair from the mass of the rice.
The mass of the strand of hair is 2.17 x 10^-5 ounces.
The mass of the grain of rice is 0.002 ounces.
Subtracting the mass of the hair from the mass of the rice, we get:
0.002 ounces - 2.17 x 10^-5 ounces = 0.0019783 ounces.
To express the answer in scientific notation, we need to write it as a number between 1 and 10 multiplied by a power of 10. So, 0.0019783 can be expressed as 1.9783 x 10^-3.
Therefore, a grain of rice is 1.9783 x 10^-3 ounces heavier than a strand of hair.