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a periodic wave is produced in a stretched string by a mechanical oscillator operating at a frequency of 420 hz the
two forces are the only forces acting on a 30 kg object whichmoves with an acceleration of 30 ms2 in the positive y
a cylindrical air duct in an air conditioning system has a lengthof 55 m and a radius of 72 x 10-2 m a fan forces air
two college students having the same mass m roll toward each other on roller blades each moving at the same speed v
a small crack occurs at the base of a 150 m high dam theeffective crack area through which water leaves is 130 x 10-3m2
only a small part of an iceberg protrudes above the water whilethe bulk lies below the surface the density of ice is
a capacitor has a capacitance of 231e-8 f in the charging process electrons are removed from one plate and placed on
a pyramid with horizontal square base 440 m on each side and height of 400 m isplaced in a vertical electric field of
a protonand an electron are held in place on the xaxis the proton is at x ndashd while the electron isat x d they are
gas in a container expands at a constant pres- sure of 88 atm find the work done by the gas if the initial volume is 5
a parallel-plate capacitor is made of two flat metalplates pressed against a thin slab of dielectric material the
while moving in a new homeowner is pushing a box across the floor at a constant velocity the coefficient of kinetic
in an old house the heating system uses radiators which arehollow metal devices through which hot water or steam
a 400 kg ballet dancer stands on her toes during aperformance with four square inches 260 cm2 in contact with thefloor
what is the magnitude of the electric force of attraction betweenan iron nucleus q 26e and its innermost electron if
at green hills golf course the ninth hole par 3 isfrom an elevated tee box with a laser rangefinder a golfermeasures
a positively charged small region in a thundercloud creates anelectric potential of 676 mv at ground level301 m below
an electron is in a vacuum near earths surface and located at y 0 on a vertical y axis at what value of y should a
a spring with spring constant k30 is compressed a distance of02 meters and shoots a 01kg block across a frictionless
the magnetic field produced by the solenoid in a magnetic resonance imaging mri system designed for measurements on
a wire has a length of 418 x 10-2 m and is used tomake a circular coil of one turn there is a current of 834 a in the
an electron has a kinetic energy of 12 x 10-17 j it moves on a circular path that is perpendicular to a uniformmagnetic
the hang time of a punt is measured to be 430 if the ball was kicked at an angle of 680 above the horizontal and was
a particle with a charge of 5 x 10-6 c and a mass of 20g movesuniformly with a speed of 7ms in a circular orbit around
a model rocket fired vertically from the ground ascends with avertical acceleration of 36ms2 for 50 s its fuel isthen