Which of the following is/are formed as gravity pulls increasing amounts of dust and debris in a nebula together? a. the solar wind
b. meteors
c. planetesimals
d. meteorites

Why do astronauts in the space shuttle weigh less?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?