R-values measure how well a material (Check all that apply.)
1.loses heat.
2.conducts heat.
3.insulates
4.keeps heat from moving.

The answer will be Conducte heat

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures