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A 70 turn coil of radius 4.6 cm rotates in a uniform magnetic field having a magnitude of 0.45 T. If the coil carries a current of 30 mA, find the magnitude of the maximum torque exerted on the coil.
N · m
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle.
A railroad car of mass m moving at v collides completely inelastically with a stationary railroad car of mass 2 m and couples to it
A generator has a square coil consisting of 288 turns. The coil rotates at 117 rad/s in a 0.218-T magnetic field. What is the length of one side of the coil
A ball is thrown vertically upward with a speed of 1.63m/s from a point 4.21m above the ground. What is the time at which it will reach the ground.
If the coefficient of friction between the ladder and ground is 0.42, illustrate what is the mass of the heaviest person who can safely ascend to the top of the ladder?
A car starts from rest and travels for 5.0 s with a uniform acceleration of +1.8 m/s2. How fast is the car going at the end of the braking period
Two small metal spheres with masses 2.0 {rm g} and 4.0 {rm g} are tied together by a 5.3-{rm cm}-long massless string and are at rest on a frictionless surface. Each is charged to +2.3 mu C. What is the energy.
Hydrogenic atoms in an ultraviolet light fall from energy quantum state n = 9 to state n = 2 while releasing ultraviolet photons. How many photons are being released per second
A wire is 1.4 m long and 1.3 mm2 in cross-sectional area. It carries a current of 5.8 A, Calculate the conductivity of the material of which this wire is made
Suppose two kids get on a 4 meter long teeter-totter. The one on the right creates a CW torque of 350 Newton-meters (Nm). Quite by coincidence, when the other kid sits at 1 meter from his end they balance perfectly. How much does second kid weigh.
A 100kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30 below the horizontal. The coefficient of kinetic friction is 0.20. What must be the magnitude of P, so that the net work completed by it and the kinetic..
"As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. What is the baseball's acceleration in m/s2 and in g's
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