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a disk of radius r ad thickness w has a mass density that increases from the center outward given by 0rr where r is the
a 450 kg girl is standing on a 162 kg plank the plank originally at rest is free to slide on a frozen lake which is a
a particle executes simple harmonic motion with an amplitude of 71 cm at what displacement in cm from the midpoint of
suppose a star with radius 830 108 m has a peak wavelength of 684 nm in the spectrum of its emitted radiationa find the
a rotating cylinder about 16 km in length and 70 km in diameter is designed to be used as a space colony with what
white light is shone on a very thin layer ofalcohol n136 and above the alcohol layer interference maxima for two
in a compton scattering experiment an x-ray photon scatters through an angle of 210deg from a free electron that is
a magnetic field increases from 0 to 030t in 15 seconds how many turns of wire are needed in a circular coil 15cm in
which of the following is not true of all electromagnetic waves only one answer is correcta the electric and magnetic
at a carnival you can try to ring a bell by striking a target with a 968-kg hammer in response a 0358-kg metal piece is
a square 0141 m on a side is mounted so that it can rotate about an axis that passes through the center of the square
four identical masses of 31 kg each are located at the corners of a square with 15 m sides what is the net force on any
house painter stands 3 m above the ground on a 52-m-long ladder that leans against the wall at a point 47 m above the
two charges 40x 10-8c and -20 x 10-8c are separated by 12 cm a third charge is between them with a charge of 30 x 10-8
alpha particles are accelerated through a potential difference of 1500 volts and then enter a magnetic field 04t
a particle with mass of 500 x 10-8 kg and 4c of charge with an initial horizontal velocity of vox400ms enters to a
a car is traveling with a speed of 170 ms along a straight horizontal road the wheels have a radius of 0290 m if the
white light is shone on a very thin layer of alcohol n 136 and above the alcohol layer interference maxima for two
a certain superconducting magnet in the form of a solenoid of length 0350 m can generate a magnetic field of 850 t in
a robbers getaway vehicle which can travel at 08c is pursued by a cop whose vehicle can travel at 04c realizing that he
a spaceship of length l moves with a speed 7c12 with respect to the ground a ball is thrown from the back of the ship
you have 33 tuning forks that oscillate at close but different frequencies what are the a maximum and b minimum number
hot chocolate effect tap a metal spoon inside a mug of water and note the frequency fi you hear then add a spoonful of
a space explorer a sets off at a steady 095c to a distant star after exploring the star for a short time he returns at
in a fast-pitch softball game the pitcher is impressive to watch as she delivers a pitch by rapidly whirling her arm