The coldest part of the atmosphere is the mesosphere
The answer for this question would be choice "<span>B. The average annual dose of background radiation is 250 times smaller than the dose linked to increased cancer risk."
You only have to compare 4.0 x 10^-4 and 1.0 x 10^-1. And if you can observe carefully, when you try to multiply the average annual dose of background radiation by 250, you would get 0.1 which is equivalent to the amount of annual dose linked to increased cancer risk. Therefore, the answer is B.</span>
To calculate the density of the white dwarf we need the mass of the Sun and the radius of the Earth:
- Sun mass:
- Earth radius:
Assuuming the dwarf to be a perfect sphere, its volume is
.
The average density is given by
so, substituting we find
Answer:
Explanation:
The PE equation for a mass/spring system is
Δx² and filling in:
and
so
k = 26000 N/m
If the displacement from equilibrium changes more, the PE needed to compress it will also change.
gives us that
PE = 520J
Yes because your mom jeans and your dad jeans may be differine from one another