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Three forces act on an object at rest ( which means the vector sum of the three forces is zero). The first force is 311 N at an angle of 22.0 degrees. The second force is 188 N at an angle of 318 degrees. Find the third force (magnitude and direction).
two long parallel wires separated by 50 cm both carry currents of 4.0 A in the same vertically up direction. Find the magnetic field midway between the wires
A certain string can withstand a maximum tension of 31 N without breaking. A child ties a 0.33 kg stone to one end and, holding the other end, What is the speed of the stone as the string breaks
A binary system consists of two stars that revolve in a circular orbit about a center of mass midway between them. This means that the masses of two stars are equal. Suppose the orbital speed of each star is 285 km/s and the orbital period of each..
An electric dipole includes a charge of 4 ?C and a second charge. What is the total charge of the dipole
The drawing shows three identical springs hanging from the ceiling
A step-down transformer is used for recharging the batteries of portable devices. calculate rms output voltage of the transformer
A centrifuge in a medical laboratory rotates at an angular speed of 3400 rev/min, Find the constant angular acceleration of the centrifuge
Bicyclists in the Tour de France reach speeds of 34.0 miles per hour (mi/h) on flat sections of the road. What is this speed in meters per second
On the screen of a multiple-slit system, the interference pattern shows bright maxima separated by 0.86° and seven minima between each bright maximum. How many slits are there
Object O1 is 14.7 cm to the left of a converging lens with a 12.0-cm focal length. What is the focal length of the second lens
Two horses are pulling a barge with mass 1.87 103 kg along a canal, Find the initial acceleration of the barge
A point source is 180 cm below the surface of a body of a liquid (n = 1.33 ). Find the diameter (in meters) of the largest circle at the surface through which light can emerge from the liquid into the air
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