I need help QUICK!! 20 points 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

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?