Which statement best describes perigee?
a. the farthest point in the moon's orbit to earth
b. the closet point in the moon's orbit to earth
c. the sun's orbit that is closest to the moon
d. the closest point in earth's orbit of the sun

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

The receptor cells that convert light energy into neural signals are called