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two sinusoidal waves identical except for phase travel in the same direction along a string producing a net wave yx t
a flat unbanked curve on a highway has a radius of 260 a car rounds the curve at a speed of 260 what is the minimum
a car is traveling at 530 mih on a horizontal highwaya if the coefficient of static friction between road and tires on
consider a large truck carrying a heavy load such as steel beams a significant hazard for the driver is that the load
the diameters of the main rotor and tail rotor of a single-engine helicopter are 144 m and 214 m respectively the
a shot-putter throws the shot mass 73 with an initial speed of 140 at a 320 angle to the horizontalcalculate the
a woman at an airport is towing her 205 kg suitcase at constant speed by pulling on a strap at an angle of above the
a 300 kg block starts from rest at the top of a 30deg incline and slides a distance of 180 m down the incline in 130 sa
an elevator mass 5000 is to be designed so that the maximum acceleration is 620times102what is the maximum force the
in the bohr model of the hydrogen atom the speed of the electron is approximately 180x106 msa find the force acting on
whenever two apollo astronauts were on the surface of the moon a third astronaut orbited the moon assume the orbit to
in a thundercloud there may be electric charges of 370 c near the top of the cloud and -370 c near the bottom of the
a car is traveling at 480 kmh on a flat highwaya if the coefficient of friction between road and tires on a rainy day
a hockey puck is hit on a frozen lake and starts moving with a speed of 121 ms five seconds later its speed is 550 msa
a 2000 kg car is slowed down uniformly from 240 ms to 500 ms in 540 sa what average total force acted on the car during
a sled is being pulled along a horizontal surface by a horizontal force of magnitude 600 n starting from rest the sled
a metal ball with a mass of 229middot10-6 kg and a charge of 457 mc has a kinetic energy of 451middot108 j it is
two firecrackers explode at the same place in a laboratory and are separated by a time of 3 years as measured on the
romeo is chucking pebbles gently up to juliets window and he wants the pebbles to hit the window with only a horizontal
an asteroid is moving along a straight line a force acts along the displacement of the asteroid and slows it down the
two charged objects experience a mutual repulsive force of 071 n if the charge of one of the objects is reduced by half
four point charges q are fixed to the four corners of a square that is 112 cm on a side an electron is suspended above
two cylindrical glass beads each of mass m 32 mg are set on their flat ends on a horizontal insulating surface
consider two systems each containing an ideal gas with n particles kept at the same temperature but different pressures
a person pushes a 197-kg shopping cart at a constant velocity for a distance of 213 m on a flat horizontal surface she