What information provided evidence for the location of the sun in the galaxy?
1. observation of globular clusters
2. observation of elliptical orbits of planets around the sun
3. determination of the composition of stars within the galaxy
4. measurements of relative brightness of stars within the galaxy

What is the density of the black hole

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added

How many moles of oxygen gas are produced from the decomposition of six moles of potassium