What is the temperature of neptune in fahrenheit

What is the difference between electrically neutral objects and electrically charged objects

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.