Which of these systems can be explained by Newton’s laws of motion and gravitation? Select all that apply.

the motion of electrons in an atom
the motion of Earth around the Sun
the motion of a race car on a racetrack
the motion of a ball falling on Earth

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o