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if 200 j of heat is removed from a hot reservoir at 800 k by an engine cycle then according to second law of
a heavy stone of mass is hung from the ceiling by a thin 825-g wire that is 650 cm long when you gently pluck the upper
light of wavelength 650 nm passes through a single slit of width 005 mm what is the angular spread of the central
a steel lift column in a service station is a solid cylinder 40 m long and 020 m in diameter youngs modulus for this
in a thin film experiment a wedge of air is used between two glass plates if the wavelength of the incident light in
a wall-mounted lamp of mass m is suspended from a light curved rod the bottom of the rod is bolted to the wall the rod
a straight wire having a length of 140 m is bent to form a square if the wire carries a current of 200 a what is the
a contact lens is made up of a material with index of refraction 16 one face has to be in contact with the eye so it is
a crane lifts a 964kg car into the air at a steady speed of 624ms find the power being used to lift the
a 48db sound wave strikes an eardrum whose area is 42times105m2a how much energy is absorbed by the eardrum per second
a uniform electric field is oriented so that it makes a 600deg angle with the normal to a 10 m2 surface the electric
a box loaded with books mass254kg is being dragged across a frozen pond by a rope at an angle of 147degrees above the
a large storage tank open to the atmosphere at the top and filled with water develops a small hole in its side at a
a 20 cm thick bar of soap is floating on a water surface so that 13 cm of the bar is underwater bath oil of specific
b 30tk sin 10 times107 x t x is in meters and t is in secondsa what is the wavelength of the waveb what is the
the force on an object is given by fx -2x2ex where f is in newtons and x is in meters what is the change in the
the x y and z components of a vector a are lt-3 2 1gt and the components of a vector b are lt2 -2 4gt what is the angle
the components of velocity of an object moving in two dimensions are 40 ms westward and 28 ms southward what is the
a 78 kg person is standing on the edge of a rotating merry-go-round platform with a 30-m radius 205kg mass and a 145
in a photoelectric effect experiment the cathode made of chromium work function 45 ev is irradiated with ultraviolet
if you triple the distance between two charged objects by what factor is the electric force
two balls of mud collide head-on in a perfect inelastic collision suppose m105kg m2 025kg v1i 4 ms and v2i -3 ms
in a single slit diffraction experiment the width of the slit is 2x10-5 m and the distance from the slit to the screen
if the iron core of a collapsing star initially spins with a rotational frequency of f 63 s-1 and if the cores radius
the magnetic field of an electromagnetic wave in a vacuum is bz 35 mut sin 16times107 x - 2pi f t where x is in m