Physics, 31.03.2020 03:27 alissalhenry

Which of the following observations must be explained by any theory of cosmology? A. the expansion of the universe B. the existence of neutrinos C. the helium abundance D. the cosmic microwave background E. the existence of black holes

Answers: 2

Show answers

Another question on Physics

Physics, 21.06.2019 17:00

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Answers: 2

Answer

Physics, 22.06.2019 01:30

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Answers: 1

Answer

Physics, 22.06.2019 08:50

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

Answers: 3

Answer

Physics, 22.06.2019 19:20

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

Answers: 1

Answer

You know the right answer?

Which of the following observations must be explained by any theory of cosmology? A. the expansion o...

Questions