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A fish appears to be below the surface of a pond (n=1.33). Calculate what is its actual depth? (Hint: use the paraxial approximation)
A girl is strapped to a board that is moving so that gamma along the length of the board is 2.0. What is the length of the girl's board in your reference frame when she arrives
A ball of mass 1.7 kilogram is hung from a spring which stretches a distance of 0.27 meter. Calculate whta is the spring constant of the spring
A 1400 kilogram car crashes into a tree. It was going 20.0 meters per second and it was brought to rest in 0.4 seconds. Find the average force exerted on the car during the collision
In a particular beta-minus decay of a free neutron (that is, one not part of an atomic nucleus), the emitted electron has exactly the same kinetic energy as the emitted electron antineutrino. What is the value, in MeV, of that kinetic energy? Assume ..
Two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 x 10^6 N/C. What is the charge density on each plate
While messing around with billiard balls, you roll the 8-ball into another ball of the same mass and initially at rest. After the collision, Find the original speed of the cue ball
What is the movement of the centre of mass of the two particles
Aluminum's density is 2700 kg/m^3. An aluminum cube 3.4cm on a side is placed on a scale. What does the scale read when the cube is entirely in air
A hollow, thin-walled sphere of mass 13.0kg and diameter 45.0 cm is rotating about an axle through its center. At the time 4.00s, find the angular momentum of the sphere
Blood can carry excess energy from the interior to the surface of the body, where the energy is dispersed in a number of ways. determine the temperature of the blood
the nobel prize was given to penzias and wilson in 1978 for their observation of the cosmic background radiation the
A farm tractor tows a 4830 kg trailer up a 15.5° incline at a steady speed of 2.0 m/s. What force does the tractor exert on the trailer
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