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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.
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. 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.
The diameter of a sphere is measured to be 6.94 in. Find the radius of the sphere in centimeters
A 3.0 m tall, 60 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed
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 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
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.
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
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
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..
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?
A wave traveling in the +x direction has an amplitude of 0.421 m, Write the equation of the wave
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