gk636

Question: "Given the mass and radius of the planet Mercury, calculate the density."

Mass: 3.3010 x 10 to the 23rd kg

Radius: 2.440 x 10 t0 the 6th m

Yes, I have tried google and it hasn't been helpful. I am just unsure of how to set up and do the equation.

Question: "Consider two stars, Star A and Star B. Star A has a temperature of 4505 K, and Star B has a temperature of 8903 K. Star B emits ___ times more energy flux than Star A".

I'm just not sure how to do the calculations/set up the problem, I'm taking an online class and the professor has provided little to no details about specific calculations (it is a lab class).