What is the reference point for the Solar System?

The Sun

Explanation:

A good reference point to use when determining the motion of planets in the solar system is the sun because it is in the center of the universe and all of the planets revolve around it. Because the sun is considered stationary, it allows us to see if the planets are in motion or not.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers