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in a hydro-electric power station water falls through a 75 mpipe at the rate of 1500 kg s-1 kilograms per second how
a coin is placed 32 cmfrom the center of a horizontal turntable initially at rest the turntable then begins to rotate
a photovoltaic cell can produce an average of 40 wm-2 watts permeter squared of electrical energy if it is directly
a hollow sphere of radius 050 m withrotational inertia i 0038 kgm2 about a line through its center of mass
abox has a weight of 150n and if being pulled across ahorizontal floor by a force that has a magnitude of 110n the
two resistors r1100 ohms and r2200 ohmsare connected in parallel across a battery the current throughr1 is 0150 amperes
a compact disk player has just been turned off a disk deceleratesuniformly from an initial angular velocity of 720 revs
the average intensity of light emerging from a polarizing sheet is0692 wm2 and the averageintensity of the horizontally
a 29-kg block slides with a speed of 16ms on anbsp frictionless horizontal surface until it encounters a springaif the
lets say you have a helicopter with 3 blades and eachblade is 520 m long and has a mass of 220 kgthe rotor is rotating
two converging lenses each of focal length 131 cm are placed 611 cm apart and an object is placed 285 cm in front of
a dentist uses a mirror to examine a tooth the tooth is 116cm in front of the mirror and the image is formed 121 cm
a 30 kg particle withvelocity v 50 ms ihat -60 ms jhat isat x 30 m y 80 m it is pulled by a 70 n force in thenegative
a gas is contained in a closed cylinder with a mobile piston at oneof its ends for the following conditions indicate 1
a weather vane initially at rest has a moment of inertia of0124 kg middot m2 about itsaxis of rotation a 250 g piece of
a 30 kg particle with velocity v 50 ms ihat - 60 msjhat is at x 30 m y 80 m it is pulled by a 70 n force inthe
the 11 kg balls are attached to the ends of a thin rod of length 420 cm and negligible mass the rod is free to rotate
a neodymium-glass laser emits short pulses of high-intensity electro magnetic waves the electric field of such a wave
the magnitude of the electric field of an electromagnetic waveincreases from 315 to 935 nc a determine thewave
a laptop computer communicates with a router wirelessly bymeans of radio signals the router is connected by cable
a typical power transmission line carries a current of 1000 a about 300 meters above the ground the magnetic field
a pulley with a rotational inertia of 32times10-3kg m2 about its axleand a radius of 80 cm is acted on by a force
1 when a baseball player hits a home run the baseball receives agreater impulse from the bat than the bat does from
a block of mass 250 kg is pushed 220 m along a frictionless horizontal table by a constant 160-n force directed 250deg
on planet tehar the acceleration of gravity is the same as that onearth but there is also a strong downward electric