Our universe has an age to ~ 13.7 gyr and h. 67.74 km s-1 mpc-1. (a) show that the hubble time is 14.44 gyr and that to = 0.949h,. (b) show that the universe would be 1.42 times younger if it were always matter-dominated (c) show that the universe would be 1.9 times younger if it were always radiation-dominated (d) use the above to argue that radiation-dominated universes expand faster than matter-dominated ones (e) imagine our universe had a single component, show that, to get to = 13.7 gyr, w = -0.300. what kind of universe is this?
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Physics, 22.06.2019 05:40
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
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Physics, 22.06.2019 09:30
Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?
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Physics, 22.06.2019 15:10
Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground
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Our universe has an age to ~ 13.7 gyr and h. 67.74 km s-1 mpc-1. (a) show that the hubble time is 14...
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