taking the earth to be uniform sphere of radius 6400km , calculate the total energy needed to raise a satellite of mass 1000kg to a height of 600km above the ground and to set it into circular orbit at that altitude​

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Give an example in which the electrical energy changes to light energy