Physics, 23.07.2019 17:30 aroman4511
Which two pieces of evidence most directly support the idea that during the first moments after the big bang, light elements formed from the original energy present? a. the abundance of helium in the universe and einstein's mass-energy equivalence b. einstein's mass-energy equivalence and the redshift of light from galaxies c. the abundance of helium in the universe and the uniform distribution of cosmic background radiation d. the redshift of light from galaxies and the uniform distribution of cosmic background radiation
Answers: 1
Physics, 22.06.2019 11:00
Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?
Answers: 3
Physics, 22.06.2019 22:00
If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?
Answers: 1
Physics, 23.06.2019 00:30
What types of radiation make up the electromagnetic spectrum?
Answers: 2
Which two pieces of evidence most directly support the idea that during the first moments after the...
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