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two charges of equal magnitude exert an attractive force of 20times10-4 n on each other if the magnitude of each charge
a cruise ship sails due north at 400 ms while a coast guard patrol boat heads 420deg north of west at 500 ms what are
a when placed in a water of density 997 kgm3 a hollow sphere of inner radius 10cm and outer radius 11cm floats with
explain the experimental evidence and reasoning that led 19th century physicists to conclude that light has wavelike
a double- slit experiment is performed by a coherent single frequencywavelength beam of laser light1 assume that the
with a gauge find the width of one of your fingers also gauge the distance from the tip of your nose to your finger
an upright image is formed with a spherical mirror of focal length of 15 cm the distance between an object and its
dentistsrsquo chairs are examples of hydraulic- lift systems if a chair weighs 1600 n and rests on a piston by a
a 750-kg car moving at 23 ms brakes to a stop the brakes contain about 15 kg of iron which absorbs the energy what is
a 175-g lump of molten lead at its melting point 327degc is dropped into 55 g of water at 200degc1 what is the
a 175-g object is attached to a spring that has a force constant of 765 nm the object is pulled 975 cm to the right of
consider a simple model of the hydrogen atom where one electron is in a stable orbit around one proton at a distance of
two masses ma 4 kg mb 10 kg are connected via a light string around a solid disk frictionless pulley mp 1 kg rp 20
a car on a straight road is stopped at a traffic light when the light turns to green the car accelerates with a
a race car rounds a curve at 54 ms the radius of the curve is 406 m and the cars mass is 685 kg suppose the cars speed
a u-shaped tube open to the air on both ends contains mercury water is poured into the left arm until the water column
a passenger car traveling down a rough road bounces up and down at 11hz with a maximum vertical acceleration of 017ms2
an air-track glider attached to a spring oscillates among the 140cm mark and the 590cm mark on the track the glider
a particle had a velocity of 15 ms in the positive x direction and 26 s later its velocity was 31 ms in the opposite
agent arlene devised the following method of measuring the muzzle velocity of a rifle she fires a bullet into a 4400-kg
a speedboat moving at 350 ms approaches a no-wake buoy marker 100 m ahead the pilot slows the boat with a constant
a particle leaves the origin with a speed of 33 times 106 ms at 38 degrees to the positive x axis it moves in a uniform
a string with both ends held fixed is vibrating in its third harmonic the waves have a speed of 193ms and a frequency
ultrasound is the name given to frequencies above the human range of hearing which is about 20000 hz waves above this