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a hockey player wants to pass the puck to his team mate. the puck needs to go a distance of 30 meters before coming to a rest. the coefficient of kinetic friction between the puck and the snow is 1/6. what initial velocity should be given to the puck?
The energy eigenstates of the hydrogen atom are described by Schrödinger wavefunctions ?(r), where the energy of the ground state ?100(r)=-13.6eV. Determine the expectation value of the energy
A child and sled with a combined mass of 48 kg slide down a snow-covered (and frictionless) hill. Find the kinetic energy at the top of the hill
A tow truck is pulling a car out of a ditch by means of a steel cable (Y = 2.0 x 1011 N/m2) that is 8.24 m long and has a radius of 0.402 cm. How much has the cable stretched
An automobile travels on a straight road for 40.0 km [E] at 30.0 (km/h). It then continues in the same direction for another 40.0 km [E] at 60 (km/h). Estimate the average speed, distance, displacement, & average velocity for the trip.
A uniform, thin, solid door has height 2.40 m, width 0.900 m, and mass 22.5 kg. Find its moment of inertia for rotation on its hinges
Sound 1 has an intensity of 35.0 W/m^2. Sound 2 has an intensity level that is 2.7 dB greater than the intensity level of sound 1
plan a vector to represent each of the two teams. find the magnitude of the resultant.
q1. a lightning bolt transfers 6.0 coulombs of charge from a cloud to the ground in 2.0 10-3 second. what is the
Regarding the Earth and a cloud layer 750m above the Earth as the "plates" of a capacitor, calculate the capacitance. Suppose cloud layer has an area of 1 km2 and that the air between cloud and ground is pure and dry.
A loudspeaker of mass 18.0kg is suspended a distance of h = 2.00m below the ceiling by two cables, What is the Tension T in each of the cables
A level pipe contains a nonviscous, incompressible fluid with a density 1200 kg/m3 that is flowing steadily. What is the speed of the flow at this second position
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.60 cm. What is the work done by the field on the electron
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