Problem 28.04. The Big Bang that began the universe is estimated to have released 1068 J of energy. How many stars could half this energy create, assuming the average star's mass is 4.00 × 10³0 kg ?

1. If a proton is moving at very high speed, so that its kinetic energy is much greater than its rest energy (mc²), can it then decay via p →n + n+? 2. What would an “antiatom," made up of the antiparticles to the constituents of normal atoms, consist of? What might happen if antimatter, made of such antiatoms, came in contact with our normal world of matter?

Q4. A neutron at rest decays into a proton with a decay energy of 0.782 Me. What will be the maximum kinetic energy of the residual proton?

MASS OF A PROTON: 1.007825 U; MASS OF A NEUTRON: 1.008665 U 10.. What are the four fundamental Forces (interactions) - Describe their interactions and ranges.

Compute the life expectancy of a 1.5M⊙ star.

If you have a positive look (pi+, mass: mpi = 2.50 x 10-28 kg) at rest and it decays to a positive muon (u+, mass: mu = 1.88 x 10-28 kg) and a neutrino. 1. How much gas is released during the decay process in MeV? If the rest mass of a neutrino is assumed to be negligible.  2. Why is the neutrino required for this decay to occur?

What is the total kinetic energy of the decay products when an upsilon particle at rest decays to t+ + t- ?

Name: Hubble Distances Redshift z parameter The relativistic redshift is parametrized by z and given by Δ In terms of the scale factor, 2= X do - de de 1+z= ao a (2) Problem 01. Find the redshift z for a Hydrogen spectral line originally at 656 nm which has been observed at a wavelength of 1.64 μm. Astro 001 Fall 2022 Problem 02. How much smaller was the universe when this light was emitted? U₁ = DHO Using the redshift to measure the velocity, we find D~ (1) 0.1 Hubble's Law Hubble's Law states that the recession velocity of a redshifted galaxy is given by the product of the distance and the Hubble constant. (3) ZC Ho where c = 3 x 108 m/s and Ho = 2.3 x 10-18 s in standard units. The standard measurement of the Hubble constant is Ho = 71 (km/s)/Mpc. Problem 03. What is the distance in Mpc and ly to the galaxy measured in problem 01? 1 pc = 3.26 ly.

Two small spheres have equal masses, m, but one is matter, and the other is antimatter. They come into contact and annihilate completely, releasing 6.1x10 MeV of energy’s What is the mass , m, in kilograms of either sphere ?