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1.We have heard of simple toy models of the Universe that were studied by Einstein, de Sitter, and Friedman. If our Universe was 100,000 times denser than it actually is, what fate would the toy-model predict, a Big Crunch, Eternal Expansion, or a Big Rip? Why?
2. In the question above, would the universe have a finite size or would it be indefinitely large?
A ship sets sail from Rotterdam, The Netherlands, heading due north at 6.00 m/s relative to the water. What is the velocity of the ship relative to the earth
A nuclear power plant has an actual efficiency of 33%. If of energy are released from fission, how much electric power does the power plant produce?
A charged water droplet of radius 2.1 mm remains stationary in air.If the electric field of the earth is 151.00 N/C, how many excesselectron charges must the water droplet have?
An iron casting containing a number of cavities weighs 16967.7 N in air and 13045.8 N in water. What is the total volume of all the cavities in the casting
A 4.70 kg object on a horizontal frictionless surface is attached to a spring with spring constant 920 N/m. obtain the initial potential energy of the block-spring system
Two electrons in the same atom both have n = 9 and = 3. (Keep in mind that the electrons are indistinguishable) How many different states are possible? How many different states would be possible if the exclusion principle were inoperative?
Light of wavelength 5.10 multiply.gif 102 nm passes through a slit of width 0.210 mm. Determine the width of the first-order bright fringe
A disk drive plugged into a 120V outlet operates on a voltage of 12V. Find the number of turns on the secondary coil
Which of the following is not a valid criterion for the acceptance of a physical law or theory?
An 8.54kg block of ice at 0 %u2218C is sliding on a rough horizontal icehouse floor (also at 0 %u2218C) at 15.2m/s, What is the maximum amount of ice that will melt
The coil is in a uniform magnetic field that is perpendicular to the plane of the coil. Illustrate what rate of change of the magnetic field strength will induce a current of 4.98 A in the coil?
The speed of an alpha particle is determined to be 8.75 x 106 m/s. What is the magnitude of that potential
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