Find the speed se of the spacecraft when it crashes into the earth. express the speed in terms of me, re, and the universal gravitational constant g.

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information

In a system, when potential energy decreases, then entropy also decreases. true false

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant