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A mass of 210 g oscillates on a horizontal frictionless surface at a frequency of 4.0 Hz and with amplitude of 4.4 cm.
What is the effective spring constant for this motion?
How much energy is involved in this motion?
A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x10-4 J with a density u = 0.0042 J/m3, What is the winding density n of the solenoid
Mercury is about 13.6 times the density of the human body. Assume that a person (Weight = 150lb {one could only wish}) were totally immersed in the mercury; what would be the buoyant force experienced by that person?
Two children are playing on a balanced seesaw. One child with a mass of 48 kg sits 1.4 m from the center. Where on the other side must the second child sit
A current of 2.0 A is flowing along the z-axis in the positive z direction from the origin to z=-2 m. Find the magnetic field, Which field is the strongest and Why
A 33.1-A current flows in a long straight wire. Find the strength of the resulting magnetic field at a distance of 65.7 cm from the wire
A piece of balsa wood with density 0.50g/cm^3 is released under water. What is the initial acceleration?? Repeat for a piece of maple with density 0.760 g/cm^3? Repeat for a ping-pong ball with the average density of 0.127 g/cm^3.
A small 12.3 g plastic ball is tied to a very light 28.6 cm string that is attached to the vertical wall of a room, Find the magnitude and direction of the electric field in the room
A 19 g bullet is shot into a 5270-g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of 2.4 m/s. compute the velocity of the bullet before striking block.
What is the strength of an electric field at a distance r from the center, inside the sphere. Assume the sling thrower could gradually increase the speed of the stone.
A 75 kg patient swallows a 30 micro Ci beta emitter wtih a half life of 5 days. The beta partiles are emitted with an average energy of .35MeV. What dose equivalent does the patient recieve
A 1200kg car rounds a curve of radius 65 m banked at an angle of 14degrees. if the car is traveling at 30km/hr, will a friction force be required? if so, how much and in what direction.
A fugitive tries to hop on a freight train traveling at a constant speed of 4.8. What is the distance traveled to reach the box car
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