The force between two objects, each of charge -Q is measured as +F when the objects are separated a distance 2d apart. If the charge on only one object is tripled, determine the new force between them:

What three things determine the shape and size of a puddle when water is poured out onto a surface

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

How many grams of mgbr2 are needed to produce 75g or metal?