2. an electric heating element is connected to a 110 v circuit and a current of 3.2 a is flowing though the element. how much energy is used up during a period of 5 hours by the elemets? a. 550 wh b. 2,580 wh c. 352 wh d. 1,760 wh

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.