The moon and the sun both affect the tides on earth. this evidence best supports the hypothesis that
a) the sun's and moon’s gravitational attraction to water is unique.
b) every object exerts gravitational force on every other object.
c) gravity is both an attractive force and a repelling force.
d) spinning objects are attracted to liquids.

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.