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a light ray of wavelength 589 nm is incident at an angletheta on the top surface of a block of polystyrene surrounded
two conductors are made of the same material and have the samelength conductor a is a solid wire of diameter 14
two wire loops are side by side 1 then 2 the current i1in loop 1 is supplied by an external source and is clockwise
a slab of copper of thickness b is thrust into aparallel-plate capacitor of plate area a and plate separation d the
while in europe a tourist hears on the radio that the temperature that day will reach a high of 19c what is this
the primary coil of a step-up transformer is connected across the terminals of a standard wall socket and resistor 1
a cube of iron 4cm on a side is floated in a bath of mercury the density of iron is 787 gcm3 what percent of the cubes
the masses of the earth and moon are 598x 1024 and 735 x 1022 kg respectively identical amounts of charge are placed on
an olympic diver performs a dive from the 10m platform and achieves a speed of 14 ms just before entering the water
an object to the left of a lens is imaged by the lens on a screen290 cm to the right of the lens when thelens is
the focal length of a simple magnifier is 700 cm assume the magnifier to be a thin lens placedvery close to the eyea
a power plant burns coal and generates an average of 6600 megawatts mw of electrical power while discharging99000 mw as
a spaceship negotiates a circular turn of radius 2680 km at a speed of 30540 kmha what is the magnitude of theangular
a satellite has a mass of 7930 kg and is in a circular orbit 988 x106 m above the surface of a planet the period ofthe
an object 40 cm high is placed 20 cm to the left of aconverging lens with a focal length of 80 cm adiverging lens with
in a large centrifuge used for training pilots and astronauts asmall chamber is fixed at the end of a rigid arm that
a dragster starts from rest and accelerates down a track each tire has a radius of 0320 m and rolls without slipping at
a diatomic gas has a volume of 2m3 pressure of 200 kpa and atemperature of 50 degrees celsius the gas expands is
in the figure a crate of mass m 124 kg is pushed at a constant speed up a frictionless ramptheta 28deg by a
a crate of mass 115 kg is pulled up arough incline with an initial speed of 150 ms the pulling forceis 100 n parallel
two air track carts are sliding to the right at 2 ms the springbetween them has a constant of 150 nm and is compressed
a piece of metal weighs 545 n in air 375 n in water and 413 nin unknown liquid what is the density of the unknown
a circular surface with a radius of 0057 m is exposed to a uniformexternal electric field of magnitude 144 times 104nc
a long current-carrying wire is parallel to the y axis with the current i 43 a along the y direction a magnetic field
in which one of the following circumstances could mechanical energy not possibly be conserved even if friction and air