Asphere has surface area 1.25 m2, emissivity 1.0, and temperature 100.0°c. what is the rate at which it radiates heat into empty space? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ∙ k4). a.) 9.9 mw b.) 3.7 w c.) 7.1 w d.) 1.4 kw

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j

Ways that industry and agriculture use physical properties to separate substances