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the average speed of light slows to 075c when it refracts through a particular piece of plastica find change is there
two loud speakers a and b are separated by a distance of 20m the speakers emit sound waves at a frequency of 680hz that
a 20 kilogram 20 centimeter diameter turntable rotates at 100 rpm on frictionless bearings two 500 gram blocks fall
a small laser emits light at power 500 mw and wavelength 633 nm the laser beam is focused narrowed until its diameter
a mechanic is cleaning a ball bearing when she accidentally drops it the bearing has a mass of 0200 kilogram and it
compute the change in potential energy of a 828-kg man when he takes an elevator from the first floor to 26th floor if
a long cylindrical conductor of radius a 900cm and length l 800 m carries a current i 900 a uniformly over its
a 300 kilogram crate is on a rough surface inclined at 30o a constant force p2400 newton is applied horizontally to the
a student is on board the express train when it passes through the subway station he notices that the trains
two air track carts move forward one another on an air track cart 1 has a mass of 045kg and a speed of 11ms cart 2 has
a ski tow operates on a 15o slope of length 300 meter the rope moves at 120 kmh and provides power for 50 riders at
in being served a tennis ball is accelerated from rest to a speed of 480 ms the average power generated during the
a gun shoots a bullet at an angle of 60o above the horizontal with an initial speed of 300 ms compute the maximum
a uniform spherical shell of mass m 25 kg and radius r 180 cm rotates about a vertical axis on frictionless bearings a
a bullet of mass 55 g is fired horizontally into a 28 kg wooden block at rest on a horizontal surface the coefficient
a 60 kg trunk is pushed 58 m at constant speedup a 30deg incline by a constant horizontal force the coefficient of
a tennis player swings her 1000 gram racket with a speed of 11 ms she hits a 60 gram tennis ball that was approaching
a ball is projected horizontally from the edge of a table that is 111 m high and it strikes the floor at a point 128 m
an automobile with a mass of 1360 kg has 305 m between the front and rear axles its center of gravity is located 178 m
an 80 kilogram cylinder rolls without slipping on a rough surface at an instant when its center of gravity has a speed
the lifetime of the excited component of the n 1 state parallel spins that produces the 21 centimeter line transition
a parallel-plate capacitor consists of two large circular sheets of metal separated by 153 cm the electric field energy
a student sits on a freely rotating stool holding two weights each of mass 310 kilograms when his arms are extended
two vectors are given by a vector -5 i 3 j and b vector 4 i 4 ja find a vector x b vectorkb determine the angle
a 730 kg base runner begins his slide into second base when he is moving at a speed of 41 ms the coefficient of