Acertain planet has an escape speed v. if another planet has twice the radius and twice the mass of the first planet, its escape speed will be
1. v.
2. v/ 2
3. √.2
4. √ v.
5. 2v.

Which property of fossils allow scientists to determine the relative rock ages..

What happens in a global convection cell

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.