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A high diver of mass 56.9 kilogram jumps off a board 10.1 meter above the water. The acceleration of gravity is 9.8 m/s^2. If his downward motion is stopped 2.26 second after he enters the water, find what average upward force did the water exert on him? Answer in units of N.
A small sphere is released on a loop-de-loop device and it rolls without slipping. How high above the bottom of the loop should the sphere be released if when it is at the top of the loop the normal force acting on it is equal to its own weight? The ..
Some people think that they can stop themselves rushing forward by putting their hands on the dashboard. Find out the mass of the object that has a weight equal to force you just calculated.
A mass m=0.5kg is hung from a pulley with moment of inertiaI=0.20 kgm2 and radius R=10cm. what is the torque due to friction
Two small insulating spheres with radius 5.50×10?2m are separated by a large center-to-center distance of 0.555m, What is the direction of the electric field at this point
A ladder with a mass of 16 Kg is placed on a frictionless vertical wall, see fig. A 75 Kg person climbs up the ladder but notices the ladder slipping. what percent of the length of the ladder did the person climb
a flotation device is in the shape of a right cylinder with a height of 0.550 m and a face area of 4.00 m2 on top and
Two periodic waves interfere somehow. Both waves have the same frequency and wavelength. what is the range of amplitue of the resulting wave
Consider a planet that, given its albedo and distance from the sun, should have a surface temperature of 110 K, but instead has a surface temperature of 130 K because it has an internal source of heat. How much more energy is the planet emitting than..
Use the blackbody radiation law to estimate the wavelength of maximum intensity for the light from the sun's photoshere
Bowling balls are roughly the same size, but come in a variety of weights. Given its official circumference of roughly 27.4 inches, calculate the heaviest bowling ball
Suppose a monatomic ideal gas is contained within a verticalcylinder that is fitted with a movable piston. The piston isfrictionless and has a negligible mass. Through what distance does the piston drop
The Hamiltonian of a system of two (spin- 1/2) electrons, H= ?1?z1+?2?z2 where ?z is the Pauli Matrix, ? is an energy parameter and our subscripts represent the two electrons 1 and 2. What is the basis where this Hamiltonian is diagonal and what is t..
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