Asatellite is placed in a circular orbit with a radius equal to one-third the radius of the moon's orbit. what is its period of revolution in lunar months? (a lunar month is the period of revolution of the moon.)

0.19245 lunar months

Explanation:

T = Orbital time

r = Radius

1 denotes the moon

2 denotes the satellite

From Kepler's law we have

So,

The period of revolution of the satellite is 0.19245 lunar months

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.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.