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an circuit consists of a 50omega resistor in series with a 600 hz source a voltmeteracross the resistor reads 340 v
the motor of a ski boat generates an average power of 770 104 w when the boat is moving at aconstant speed of 15 ms
a horizontal cylinder thermally insulated and closed in both ends has in its interior a diathermic piston that can move
in an electric motor a coil with 100 turns of radius 20 cm can rotate between the poles of a magnet the magnetic field
a daring ranch hand sitting on a tree limb wishes to dropvertically onto a horse galloping under the tree the
speedy sue driving at 300 ms enters a one-lane tunnel she then observes a slow-moving van 155 m ahead traveling at 500
the position of a particle moving along the x axis isgiven by x 60t2 -10t3 where x is in meters andt in seconds what
a hockey puck is sliding across the ice at 100 ms a playerrsquos stick momentarily comes in contact with the puck and
a diver 48 m deep in 18degc fresh water exhales a 06 cm diameter bubble what is the bubbles diameter just as it reaches
an advanced space probe in the twenty-first century travelsfrom the earth with a speed of 500 x 106 ms relativeto the
a bird sits on a telephone wire midway between two poles 20m apartnbsp the wire assumed weightless sags by 50cmnbsp if
a 043 kg air cart is attached to aspring and allowed to oscillate the displacement of the air cartfrom equilibrium is x
a car with a 149 m long radio antenna travels at 945 kmh in aplace where the earthrsquos magnetic field is 693
a rocket is used to place a synchronous satellite in orbit about the earth what is the orbital speed of the satellite
a homemade electroscope has 2 pieces of straw hanging from 2strings dangling from a hook the length of the string
a sound wave of frequency 850 hz propagating through air has apressure amplitude of 65 pa what are thea wavelengthb
a precious-stone dealer wishes to find the specific heat capacityof a 0040-kg gemstone the specimenis heated to 950degc
an iron anchor of density 7870 kg m3 appears 200 n lighterin water than in aira what is the volume of the anchorb how
a skater of mass 820 kg initially movesin a straight line at a speed of 540 msthe skater approaches a child of mass
an electromagnetic wave strikes a 147-cm2 section of wall perpendicularly the rms value of the waves magnetic field is
a certain core material has an actual permeability of 440x10-2hm what is the relative permeability of the
a trap door of length and width 165 m is held open at an angleof 650 degrees with respect to the floor a rope
a 205-kg log is pulled up a ramp by meansof a rope that is parallel to the surface of the ramp the ramp isinclined at
a constant horizontal force moves a 50 kg trunk 70 m up a 26deg incline at constant speed the coefficient ofkinetic
an ideal gas has a density of 178kgm3 is contained in avolume of 44810-3 m3 the temperature of the gas is 273k the