A scientist adds different ammounts of salt to 5 bottles of water. She then measures how long it takes for the water to boil. What is the responding variable in this experiment? a. The brand of salt used b. The amount of salt added to the water c. The time it takes for the water to boil d. The kind of bottles used

Which of the following is considered a benefit to using wind energy as a source of power

The table lists pressure and volume values for a particular gas. which is the best estimate for the value of v at p = 7.0 × 103 pascals?

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.