Standard cosmologies other than desitter the scale factor

Assignment Help Physics
Reference no: EM13550459

For most standard cosmologies other than deSitter the scale factor varies as t^n, with n < 1. (a) Show that for such cosmologies the ratio of the particle horizon distance to the scale factor always increases with time. (b) Calculate the present distance to the horizon if the Universe is flat and we assume (incorrectly) that it contains only matter.

Reference no: EM13550459

Questions Cloud

Generator coils have number of turns-rotate angular speed : One generator uses a magnetic field of 0.10 T and has a coil area per turn of 0.045 m2. A second generator has a coil area per turn of 0.020 m2. The generator coils have the same number of turns and rotate at the same angular speed.
Voltage and current at generator end of transmission line is : A lossless transmission line is connected to a load of ZL=30 ohms at one end and a sinusoidal voltage generator at the other end, with Vg = 1? 0o (V) at the other end. The characteristic impedance and the length of the transmission line are Zo = 5..
The voltage of the battery in the circuit : Suppose that the voltage of the battery in the circuit is 3.3 V, the magnitude of the magnetic field (directed perpendicularly into the plane of the screen) is 0.66 T, and the length of the rod between the rails is 0.23 m. Assuming that the rails are..
Deriving the hawking temperature : Deriving the Hawking temperature T = (hbar)c^3/8(pi)kBGM rigorously from quantum field theory is beyond our scope. However, we can make its form plausible by the following considerations. Assume a particle– antiparticle pair having a rest mass  m..
Standard cosmologies other than desitter the scale factor : For most standard cosmologies other than deSitter the scale factor varies as t^n, with n
Use the hubble law-the apparent visual magnitude : Use the Hubble law, the apparent visual magnitude of +12.9 and the observed redshift z = 0.158 to estimate the absolute magnitude of the quasar 3C 273 (which is the brightest quasar known). Compare the luminosity of 3C 273 with that of the Androme..
A horizontal block-spring system undergoes simple harmonic : A horizontal block-spring system undergoes simple harmonic motion with amplitude A. Does the total energy change if the mass is doubled but amplitude is not changed? Briefly justify your answer
Calculate magnitude of electrostatic potential : An electron is moved from point A to point B in a uniform electric field and gains 5.4010^-15 J of electrostatic potential energy. Calculate the magnitude of the electrostatic potential difference between the two points.
What is the maximum current in the inductor : An inductor has a 57.6-? reactance when connected to a 60.0-Hz source. The inductor is removed and then connected to a 49.0-Hz source that produces a 90.0-V rms voltage. What is the maximum current in the inductor?

Reviews

Write a Review

Physics Questions & Answers

  Obtain the internal resistance of the battery

A 7.28-%u03A9 resistor is connected across a 9.00-V battery. The voltage between the terminals of the battery is observed to be only 7.27 V. obtain the internal resistance of the battery

  Determine the maximum speed that the car

Determine the maximum speed that the car. A boy riding on the back of the truck throws a can of soda upward and catches the projectile at the similar location on the truck bed.

  Find the radius of the sphere in centimeters

The diameter of a sphere is measured to be 6.94 in. Find the radius of the sphere in centimeters

  Determine by how much is the column compressed

A 3.0 m tall, 60 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed

  What is the speed of the ball at this point

A 500g rock on a 80 cm long string is swung in a vertical circle 300 cm above the ground. What is the speed of the ball at this point

  What is the maximum kinetic energy this mass obtains

What is the frequency of a spring with spring constant 420 N/m that has attached a mass of 3.5 kg and initially displaced 0.25 meters. what is the maximum kinetic energy this mass obtains

  What is maximum speed with the stone can be whirled

Density of Aluminium is 2.7g/cm3 or 2.7g/ml. How heavy (in grams) would be the coke can if instead of soda it would be filled in with aluminium? The volume of a soda can is 303 ml.

  Find the temperature of the gases at the nozzle exit plane

A liquid fueled rocket is red on a test stand. The rocket nozzle has an exit diameter of 30 cm, find the temperature of the gases at the nozzle exit plane

  Find the separation in time between arrivals of two pulses

A hammer strikes one end of a thick steel rail of a length 8.50 m. A microphone located at the opposite end of the tail detects two pulses of sound, Find the separation in time between the arrivals of the two pulses

  Determine the tension

A woman is running at a constant velocity of 5 m/s in an attempt to catch a stopped bus 11m ahead of her. Though, it pulls away from her with a constant acceleration of 1 m/s2. How much time does it take her to reach the bus if she keeps running a..

  Mutual inductance of the combination of the two coils

A 10.0 -long solenoid of diameter 0.400 is wound uniformly with 800 turns. A second coil with 50.0 turns is wound around the solenoid at its center.What is the mutual inductance of the combination of the two coils?

  Write the equation of the wave

A wave traveling in the +x direction has an amplitude of 0.421 m, Write the equation of the wave

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd