Asolar sail is made of aluminized mylar having an emissivity of 0.03 and reflecting 95% of the light that falls on it. suppose a sail with area 1.35 km2 is oriented so that sunlight falls perpendicular to its surface with an intensity of 1.40 103 w/m2. to what temperature will it warm before it emits as much energy (from both sides) by radiation as it absorbs on the sunny side?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.