Engineers find a new metal that is stronger than steel but much lighter. this
material is also significantly cheaper than what is currently used for most
aircraft, available in large quantities, and easy to manufacture. the engineers
ore excited because this new metal will lower companies cots of buying and
operating airplanes. what is the best step for the engineers to make next?
a. begin marketing a plane constructed from this metal,
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b. conduct a flight test for an airplane made from this metal,
c. decide whether or not to paint the new aircraft
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d. begin to design an airplane using this metal,

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.

Which of these is a physical property

Draw the lewis dot structure for each of the following polyatomic ions