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With what initial speed should a positive charge, +q, be given such that if starting infinitely far away from a fixed positively charged nuclues, +Q, of radius R, the positive charge is just able to get to the surface of the positive charge, done with the system as both charges
124/55 Cs has a half-life of 30.8s. If we have 5.3µg initially, how many Cs nuclei are present and What is the activity at this time
A person with a near-point distance of 32 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
A particle of mass "m" moves in a straight line with retardation proportional to its displacement. Find the expression for loss of KE for any displacement "x"
Each has a charge of +e. The length of one side of the square is L. What is the net electric potential caused by the two positive ions at both of the empty corners of the square
A golf ball strikes a hard, smooth floor at an angle of 30 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.047 kg, its speed is 45 m/s just before and after striking the floor. What is the magnitude of the impuls..
A potential di?erence of 10 V is found to produce a current of 0.44 A in a wire of length 3.1 m with a uniform radius of 0.44 cm What is the resistivity of the wire
We have pumped 20 bbls of fluid from the cement unit. But we think that we should have already achieved 425 psi at the unit. We are rigged up to do F.I.T and have already pressure tested all surface lines and there are no leaks.
A 200 keV electron strikes a copper target and is brought to rest producing a single X-ray photon. What is the Compton scattering angle relative to the direction of the incident X-ray
While pacing in the hallway at a constant velocity, you drop a tennis ball so that it falls towards the floor. calculate the height above the floor from which the tennis ball is released
You do 220 J of work pulling your sister back on a swing, whose chain is 5.00 m long, until the swing makes an angle of 30.0 degrees with the vertical, What is your sisters mass
Suppose you throw a 0.048-kg ball with a speed of 10.7 m/s and at an angle of 32.1° above the horizontal from a building 11.5 m high. What will be its kinetic energy when it hits the ground
What is the difference between voltage current characteristics for intrinsic and extrinsic semiconductor in both forward in addition to reverse direction.
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