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oblers paradox presented the contrary facts that the universe had to be infinite and uniform in order to be stable and
the radiation emitted by the primordial fireball of the big bang had a blackbody spectrum corresponding to about 3000 k
the evolution of the universe after the big bang is divided into a radiation dominated universe and a matter dominated
a block of silver mass ms 205 kg is heated in a furnace to temperature ts but remains solid it is now dropped on a
a if two sound waves one in air and one in fresh water are equal in intensity what is the ratio of the pressure
a copper wire wrapped into a coil is hooked to a 300v battery and a switch at t0 the switch s is closed at t20 seconds
the attraction of ceres ceres the largest asteroid known has a mass of roughly 87x1020kg if ceres passes within
a block of mass slides on a frictionless tabletop it is connected to a string that passes over a pulley and suspends a
the net entropy changes when a 85g ice cube initially at 0 degrees c melts in a room part a what is the net entropy
a hot air balloon is descending vertically with a speed of 40 ms when a passenger drops a 05 kg camera if the camera is
an automobile engine with an efficiency 023 dumps heat to the environment at the rate of 450 kw part a whats its
two beads slide along a straight frictionless wire the first has a mass of 05 kg and a velocity of 5ms moving to the
a 01 kg hockey puck slows down from 45 ms to 44 ms due to friction as it slides 25m across the ice a draw a free body
a 325-n force accelerates a 500-kg crate from rest along a horizontal frictionless surface for a distance of 200 m as
a hollow spherical shell with mass 175 rolls without slipping down a slope angled at 390 part a find the acceleration
a sealed glass bottle at 27degc contains air at atmospheric pressure and has a volume of 30 ml it is then tossed into
an aluminum cup contains 225 g of water at 27degc a 450 g sample of silver at a initial temperature of 85degc is placed
a copper wire 100 cm long and 20 cm in diameter is suspended from a solid support a 10 kg mass is hung from the lower
a cylinder with a movable piston contains gas at a temperature of 27degc a volume of 15 msup3 and an absolute pressure
in the continuous-caster process steel sheets 253 thick 204 wide and 110 long are produced at a temperature of 870 what
the maximum speed of a 40- mass attached to a spring is 066 and the maximum force exerted on the mass is 11 what is
largest raindrops atmospheric scientists studying clouds in the marshall islands have observed what they believe to be
a cannonball mass 50 kg is shot out of cannon at an angle of 75 degrees with respect to the horizontal the initial
a 80x10-2-kg ice cube at 00 c is dropped into a styrofoam cup holding 035 kg of water at 11 c find the final
a small remote controlled car with mass 160 kg moves at a constant speed of v 120 ms in vertical circle inside a hollow