The two jovian planets that contain the highest proportions of hydrogen compounds are
a) jupiter and neptune
b) saturn and uranus
c) jupiter and saturn
d) jupiter and uranus
e) uranus and neptune
f) saturn and neptune

What is friction? how does it affect the motion of an object?

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2

The ideal gas model is valid if which of the following conditions is true? the gas density is low. the gas density is high. the temperature is low. the temperature is high. the gas density and the temperature are low. the gas density and the temperature are high. the gas density is high and the temperature is low. the gas density is low and the temperature is high.