Physics

Physics, 18.07.2019 21:30, haileysolis5

How is dark matter detected in the universe?

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Physics, 28.06.2019 16:10, Ladyt916

Cosmology has reached an era where precise calculations can be made of the contri butions of ordinary matter and radiation, dark matter, and dark energy, to the energy density of the universe. our universe at this time is thought to be dominated by dark matter and dark energy, which together make up about 95% of the energy density. or- di in the following, ? ? is the current nary matter and radiation make up the last 5% value of the density of dark energy, and s2m refers to the energy density of everything .all al mar, dark matter, aul ralati. a) what is the effect of dark energy on the expansion of the universe? explain how type ia supernova observations are used to constrain the relative contributions of dark energy and all other matter to the energy density of the universe.

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Physics, 02.08.2019 13:10, kendall984

1. the universe could grow indefinitely if a. dark matter reduces in size b. stars keep recreating themselves c. the universe is flat and full of matter d. the universe is flat and depleted of matter 2. when a low-mass star has used it's last remaining fuel, a occurs in which radiation ionizes the star's surrounding cloud a. nova b. supernova c. black hole d. planetary nebula 3. which terrestrial plane has an atmosphere similar to earth's? a. mars b. venus c. mercury d. none of the above 4. which is evidence that supports the big bang theory? a. the expansion of the universe b. the existence of dark matter c. the detection of dark energy d. the ow levels of hydrogen and helium 5. the most of the mass in the galaxy exists as a. galactic bulge b. dark matter c. exosolar planets d. stars

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Physics, 02.09.2019 00:30, jonmorton159

Dark matter can be described as matter that a. does not exert gravitational force but can be directly detected with light b. cannot be directly detected and does not emit or absorb light c. exerts gravitational force and makes up most of the stars and planets as 3% of the universe

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