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a uniform 25 kg door that is 24 m high by 110 m wide is hung from two hinges that are 20 cm from the top and 20 cm from
the current through a 50- resistor is i 080 sin240 t how much power on average is dissipated in the
a box with a total surface area of 101 m2 and a wall thickness of 481 cm is made of an insulating material a 13 w
a string has a linear density of 560 10-3 kgm and is under a tension of 245 n the string is 19 m long is fixed at both
a 10- reistor is connected to a 120-v ac power supply what is the peak current through the
a bullet of mass 0025kg moves at 100ms initially it hits a 2kg block of soft pine and emerges from the block at 30ms
a 150-w lamp is placed into a 120-v ac outlet what is the resistance of the
a ship on the surface of the ocean receives a sonar echo back from an underwater object the echo path from the object
a simple rl circuit contains a 60- resistor and an 18-h inductor what is this circuits time
a capacitor is fully charged by a 3v battery and has 002 j of energy stored in it what is the charge on its side of the
a crate is dragged 3m across a rough floor at a constant speed by a worker applying 500n at an angle of 30 deg above
the plates of a cathode ray tube are parallel and are 5 mm apart the potential difference between them is 12 kv find
a real heat engine working between heat reservoirs at 987 k and 659 k produces 540 j of work per cycle for a heat input
consider two masses treat as point masses of mass m15 kg and m25 kg held together by a massless rod of length 2a20 m
a sinusoidal wave on a string is described by the wave function y 010 sin 085x 35t where x and y are in meters and t
a boat whose speed in still water is 8 ms is directed across a river with a current of 60ms what is the speed of the
what is the final velocity of the first ball after the collision the first ball with a mass of 01kg traveling to the
two stars orbit about their common center of mass one of the stars has mass m1 and moves in a circular orbit at a
a 300 x 10-3 kg lead bullet travels at a speed of 24 x102 ms and hits a wooden post if half the heat energy generated
in a physics lab light with a wavelength of 560nm travels in air from a laser to a photocell in a time of 173ns when a
assume that electron-hole pairs are injected into n-type gaas eg 142 ev mc oo7m0 mv 05m0 at a rate r 1o23 per cm3
an electromagnetic wave with a frequency of 720times1014hz propagates with a speed of 230times108ms in a certain piece
a very long solenoid of circular cross section with radius r 420cm has n 900 turnscm of wire an electron is sitting
in the game of billiards all the balls have approximately the same mass about 017 kg the cue ball hits a stationary
a 150g glider on a horizontal frictionless air track is attached to a fixed ideal spring with force constant 135nm at a