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a 30 kg crate is pulled across a level floor with 80 n of force the coefficient of kinetic friction between the crate
a block mass m1 lying on a frictionless inclined plane is connected to a mass m2 by a massless cord passing over a
a student of weight 660 n rides a steadily rotating ferris wheel the student sits upright at the highest point the
a charged capacitor is connected to a resistor and a switch as in the figure below the circuit has a time constant of
a ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center the disk has mass md 34 kg
in proton-beam therapy a high-energy beam of protons is fired at a tumor the protons come to rest in the tumor
an alpha particle the nucleus of a helium atom with charge 2e and a mass four times that of a proton and an antiproton
a small immersion heater is rated at 950 w estimate how long it will take to heat a cup of soup assume this is 250 ml
a car with a mass of 930 and a speed of 190 approaches an intersection as shown in the figure a 1270 minivan
a tire with an inner volume of 00250 m is filled with air at a gauge pressure of 360 psi ie lbin2 if the tire valve is
the desperate contestants on a tv survival show are very hungry the only food they can see is some fruit hanging on a
a small blob of putty of mass m 900 g falls from the ceiling and lands on the outer rim of a turntable of radius r
the light shining on a diffraction grating has a wavelength of 480 nm in vacuum the grating produces a second-order
the magnetic field of a cylindrical magnet that has a pole-face diameter of 33 cm can be varied sinusoidally between
the magnetic field produced by the solenoid in a magnetic resonance imaging mri system designed for measurements on
the tub of a washer goes into its spin cycle starting from rest and gaining angular speed steadily for 800 s at which
a fighter jet is launched from the aircraft carrier with the aid of its own engines and a steam powered catapult the
what will be the equilibrium temperature when a 239 g block of copper at 274 degrees c is placed in a 140 g aluminum
a high intensity desk lamp is rated at 45w but requires only 12v it contains a transformer that converts 120v household
the official record for the lowest temperature ever recorded on earth was set at vostok antarctica on july 21 1983 the
a proton is projected perpendicularly into a magnetic field that has a magnitude of 025 t the field is then adjusted so
which one of the following statements concerning spherical mirrors is correcta only a convex mirror can produce an
light of wavelength 380 nm is incident on the face of a silica prism at an angle of 1 642 with respect to the normal
a 22 g ice cube at its melting point is dropped into an insulated container of liquid nitrogen how much nitrogen