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a piano emits sound waves with frequencies that range from a low of about 28 hz to a high of about 4200 hz the speed of
a regarding the earth and a cloud layer 700 m above the earth as the plates of a capacitor calculate the capacitance of
an air-filled parallel-plate capacitor has plates of area 270 cm2 separated by 200 mm the capacitor is connected to a
a when a battery is connected to the plates of a 900-microf capacitor it stores a charge of 2160 microc what is the
helicopter blades withstand tremendous stresses in addition to supporting the weight of the helicopter they are spun at
how many electrons should be removed from an initially uncharged spherical conductor of radius 0100 m to produce a
a 311 kg object initially moving in the positive x-direction with a velocity of 530 ms collides with and sticks to a
you are on the tilt-a-whirl ride and it begins to spin model the ride as all the mass at a radius of 160 m the mass of
deimos a moon of mars is about 12 km in diameter with a mass of 20times1015 kg suppose you are stranded alone on deimos
a hockey puck with mass 0160 kg is at rest on the horizontal frictionless surface of a rink a player applies a force of
a pendulum is made with a 400 kg mass suspended at the end of a thin rod the period of the small motion simple harmonic
a copper rod has a length of 10 m and a cross-sectional area of 41 x10-4 m2 one end of the rod is in contact with
a man wants to swim across a river that flows n to s at 5 mshe can swim at a speed of 7ms the river is 14 km wide if he
you are standing in the very center of a deep flat-bottomed valley and shout hello if the speed of sound is 343 ms and
a construction hoist exerts an upward force of 500 n on an object with a mass of 50 kg if the hoist started from rest
an earth satellite moves in a circular orbit with an orbital speed of 6200 msa find the time of one revolution of the
the plane of a 600 cm by 800 cm rectangular loop of wire is parallel to a 0220 t magnetic field and the loop carries a
a pendulum is made with a 400 kg mass suspended at the end of a 750 cm thin rod the pendulum is started at an angle of
a pulse travels on a string 80 m long and 12 g mass if the tension in the string is 32 n how long does it take the
a man wants to swim across a river that is flowing north to south at 5 ms he can swim at a speed of 7 msthe river is 14
a scuba diver and her gear displace a volume of610l and have a total mass of680kga what is the buoyant force on the
the internal energy of a system increases by 500 j while 610 j of work are performed on it what was the heat flow into
a carnot engine uses reservoirs at temperatures of 270degc and 327degc in one cycle it uses 600 j of heat from the high
a 48-m-diameter merry-go-round is initially turning with a 43 s period it slows down and stops in 16 s before slowing
in order to stop a 1500kg car that is originally moving at 25ms and if the car stops over a distance of 50m what