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You are standing at the rear end of a raft that is 6.0 m long. The raft has a uniform mass of 120 kg and is at rest on a lake. The front end of the raft is 0.50 m from a pier. Assume your mass is 60.0 kg and the lake is a frictionless surface. You now walk to the front of the raft and stop. At the moment you stop walking, how far are you from the end of the pier?
An oversimpliefied model of the hydrogen atom has the electron orbiting the nucleus's proton at a distance of approximately 5.29x10^-11 m. how much force is needed to keep the electron in a circular orbit
A ball rolls down a roof that makes an angle of 30 degrees to the horizontal. The ball has an initial speed of 5 m/s and the roof is 7 meters tall. how far from the base of the house does it land
An ant, crazed by the sun on a hot Texas afternoon, darts over an xy plane scratched in the dirt. What are the magnitude and angle (relative to the positive x axis) of the overall displacement
By how much does the potential energy of a 15.0-kg child increase. Find v0.
A tank circuit in a radio transmitter is a series RCL circuit connected to an antenna. determine the maximum inductance of the tank circuit
A 4.90?F capacitor that is initially uncharged is connected in series with a 8.00k? resistor, A long time after the circuit is completed (after many time constants) what is the voltage drop across the capacitor
A 0.180 kg baseball, travelling 32.0 m/s, strikes catcher's mitt that recoils 13.0 cm in bringing the ball to rest. What was an average force (in newtons) applied by the ball to the mitt.
A hydrogen atom is in its first excited state n=2. Using the Bohr theor yof the atom, calculate linear momentum of the electrons
A boat moves relative to water with a velocity which is n =2 times less than the river flow velocity. At what angle to the stream direction should the boat move to minimize drifting.
A photoelectric experiment using a cesium metal surface produces stopping potentials of 0.95V and 0.38V using light with wavelengths of 435.8nm and 546.1nm, respectively. find the threshold frequency
A hard-boiled egg of mass 53.0g moves on the end of a spring with force constant 25.6 N/m. Calculate the magnitude of damping constant
Use the following values for mass and charge: an electron has mass me = 9.11×10-31 kg and charge -e, What is the kinetic energy of the electron in units of eV
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