The stefan-boltzmann law can be employed to estimate the rate of radiation of energy h from a surface, as in 4 (m'), the emissivity h aeot where h is in watts, a = the surface area that characterizes the emitting properties of the surface (dimensionless), o 5.67 x 10 wm k), andt е a universal constant -8 -2 absolute temperature = 0.90, and t= 650 20 k called the stefan-boltzmann constant (k).

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them