Which is evidence that scientists use to support the big bang theory?
a.
there is constant cosmic background radiation.
b.
galaxies are moving toward each other.
c.
a loud explosion can be heard in the radio frequencies everywhere in the universe.
d.
hydrogen and helium are the most abundant elements in the universe.

Which statement best describes the flow of energy in this scenario

What is the wavelength of a wave with a velocity of 50 m/s and a frequency of 5hz a 250 m b 0.1 m c 10m d 0.01 m

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.