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Q1. In a science fiction story, a microscopic black hole is given an enormous positive charge by firing an un-neutralized ion drive exhaust (consisting of positively charged xenon ions) into it for six months. The idea behind the charging process is to be able to confine and manipulate this dangerous object with powerful electric fields. Assume the charge on the black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V?
Q2. An observer moving toward Earth with a speed of 0.97 notices that it takes 5min for a person to fill her car with gas. Assume, instead, that the observer had been moving away from Earth with a speed of 0.80c. How much time would observer have measured for the car to be filled in this case?
A galvanometer with a full scale sensitivity of 500 muA and a coil resistance of 54 Omh, What is the required shunt resistance
A flight attendant pulls her 72-N flight bag a distance of 265-m along a level airport floor at a constant velocity. The force she exerts is 44-N at an angle of 57° above the horizontal.
An RL series circuit has R = 72.0? and L = 2.20mH . The series combination is connected across a 155V (rms), 58Hz power supply. Find the impedance of the RL combination
The starter motor of a car engine draws a current of 200 A from the battery. The copper wire to the motor is 4.90 mm in diameter and 1.2 m long, How much charge passes through the starter motor
Consider a very high energy cosmic ray photon, with energy 109mp = 1018 eV as measured in Sun's rest frame, scattering off a cosmic microwave background photon with energy 2 x 10-4 eV . Establish the maximum energy of the scattered photon.
One particle has a mass of 4.42 x 10-3 kg and a charge of +7.35 %u03BCC. A second particle has a mass of 8.69 x 10-3 kg and the same charge. Find the initial separation between the particles
A physics professor demonstrates the Doppler effect by tying a 610 Hz sound generator to a 0.9 m long rope, What are the highest and lowest frequencies heard by a student
Standing waves are set up on two strings fixed at each end, as shown in the drawing. find the beat frequency produced by the two standing waves
What is this force in Newtons.
The position vector of a particle of mass 2.10 kg as a function of time is given by rarrowbold = (6.00 ihatbold + 4.00 t jhat bold), Determine the angular momentum of the particle
A student sitting on a frictionless rotating stool has rotational inertia 0.90kg?m2 about a vertical axis through her center of mass when her arms are tight to her chest. Ignoring her arm mass, what's her new rotational velocity
A crate of 30.2- tools rests on a horizontal floor. You exert a regularly increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 319. After that you must reduce your push to 227 to keep it moving at a..
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