Asmall spinning asteroid is in a circular orbit around a star, much like the earth's motion around our sun. the asteroid has a surface area of 7.70 m2. the total power it absorbs from the star is 3800 w.
assuming the surface is an ideal absorber and radiator, calculate the equilibrium temperature of the asteroid (in k)

Temperature will be 305 K  

Explanation:

We have given The asteroid has a surface area

Power absorbed P = 3800 watt

Boltzmann constant

According to Boltzmann rule power radiated is given by

So temperature will be 305 K  

explanation:

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .