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A guitar string is supposed to vibrate at 247 Hz but is measured toactually vibrate at 255 Hz. By what percentage should the tensionon the string be changed to get the frequency to the correctvalue?
A diffraction grating with 610 lines per mm is illuminated with light of wavelength 520 nm. A very wide viewing screen is 2.1 m behind the grating. How many bright fringes can be seen on the screen
Find out direction and magnitude of force
A high-voltage power line carries a current of 120A at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 63 degrees below the horizontal. Find the magnitude of the magnetic force exerted on a 290m length..
A solid cylinder of radius .35m is released from rest from aheight of 1.8m and rolls down an incline without slipping, What is the angular speed of the cylinder when it reachesthe horizontal surface
A circular window with 0.5m radius on a submarine can withstand a maximum pressure of 8900 N/m^2. How deep can the sub safely dive
A three-step cycle is undergone by n moles of an ideal diatomic gas: (1) the temperature of the gas is increased from T_1 to T_2 at constant volume, compute the efficiency of the cycle in terms of T_1 and T_2
Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped around pulley. The bucket starts from rest at th..
A 58-kg skater sliding due northeast at an initial speed of 1.5 m/s runs into a snow bank and comes to rest in a time interval of 0.38 s, What is change in the kinetic energy of the skater
A positive point charge of magnitude 2.5 μC is at thecenter of an uncharged spherical conducting shell of inner radius60 cm and outer radius 90 cm. Find the electric field everywhere
A car (m = 1510 kg) is parked on a road that rises 18° above the horizontal. find the static frictional force that the ground exerts on the tire
Two trains, each having a speed of 27 km/h, are headed at each other on the same straight track. What is the total distance (in km) the bird travels
Just an instant before reaching the very bottom of a semicircular section of a roller coaster ride, determine the normal force of the track on the car
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