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when a carpenter shuts off his circular saw the 100-inch diameter blade slows from 4812 rpm to zero in 250 secondobtain
two slits separated by 00520 mm and located 180 m from a viewing screen are illuminated by monochromatic light the
three equal blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal
a race vehicle accelerates uniformly as it leaves the pit area going from rest to 330 kmh in a semicircular arc with a
assume 150w of heat flows by conduction from the blood capillaries beneath the skin to the bodys surface area of 15m2
in the model of hydrogen atom created by niels bohr the electron moves around the lone proton in the nucleus at a speed
1 a 0075 kg arrow is fired horizontally the bow string exerts an average force of 65n on the arrow over a distance of
a ball is thrown forward horizontally from the top of a cliff with a velocity of 10 ms the height of the cliff is 45
car c of mass 30 x 103 kilogram is traveling at 50 ms it approaches car d of mass 20 x 103 kilogram going 30 ms in the
a uniform upward-pointing electric field e of magnitude 400times103nc has been set up among two horizontal plates with
determine at what angle should the roadway on a curve with a radius 50 meter be banked to allow cars to negotiate the
a ball is thrown horizontally from the top of a house 35 meter high the ball strikes the ground 100 meter from the base
a spider hangs from a strand of silk whose radius is 190010-6 m the density of the silk is 1300kgm3 when the spider
a solid sphere of mass 10 kilogram and radius 0010 meter starts from rest and rolls without slipping down a 10 meter
a simple pendulum is made from a 076-m-long string and a small ball attached to its free end the ball is pulled to one
a 100-w incandescent light bulb has a cylindrical tungsten filament 250 cm long 0440 mm in diameter and by an
a wheel of moment of inertia of 500 kgbullm2 starts from rest and accelerates under a fix torque of 300 nbullm for 800
a meter stick lies at the bottom of a 100cm long tank by its zero mark against the left edge you look into a tank at 30
a rotating flywheel can be used to store energy if it is required to store 100 x 106 joule of energy when rotating at
a boy wishes to row across a river in the shortest possible time he can row at 2 ms in still water and the river is
unpolarized light of intensity i0 is incident on the following arrangements of polarizing sheets the first polarizer is
at timenbspt 0 a grinding wheel has an angular velocity of 230nbsprads it has a constant angular acceleration of
a narrow slit 0072 mm wide is illuminated with monochromatic light and a diffraction pattern is observed on a screen 40
an electron has a speed of 06 ca discover the speed of a proton that has the same kinetic energy as the electronb