Which of the following best describes a property of water?
a. weak cohesive forces exist between its molecules.
b. it cannot make many solutions
c. it is a liquid over a wide temperature range.
d. little energy is needed to raise its temperature.

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?

What is the magnitude of the gravitational force acting on the earth due to the sun?