Suppose that a series of measurement have shown that the mean mass of an object is 122.4 g with a standard deviation 1.3 g. how many significant figures are justified in the mean and how would you report the most probable mass of the object? explain

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.

The arrangement of particles is most ordered in a sample of

What are the two largest greenhouse gases