a distant object is observed to be partially emitting in the frequency of 1.5x10E8 Hz and has a surface temperature of 3000k. Assuming that is object is a perfect black body, what is the spectral radiance of it in this frequency in W/Hz sr m^2

Which statements describe the relationship between science and society? check all that apply. science is influenced by the needs of society. science and society are independent. science seeks ways to meet the needs of society. scientists find new ways to address societal concerns. scientists improve existing products.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )