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A simple electric motor consists of 130 turn coils in diameter, mounted between the poles of a magnet that produces a 0.24 field.
a) When an 80 Amp current flows in the coil that is its magnetic dipole moment?
b) Obtain the minimum torque developed by the motor?
a compact disc spins at 2.2 revolutions per second. an ant is walking on the cd and finds that it just begins to slide
a 17.7-kg object hangs in equilibrium at the end of a rope taken as massless while a wind pushes the object with a
Two boxes are connected by a cord running over a pulley as shown in Fig. 4-7. Box I of mass 8.0 kg rest on the top of the table; Calculate the acceleration of the system
The current in a 51 resistor is 0.14 A. This resistor is in series with a 28 resistor, and the series combination is connected across a battery
A hydrogen atom that is initially at rest absorbs a photon with an energy of 21 eV. What is the momentum of the atom
A ballplayer catches a ball 2.75 seconds after throwing it vertically upward. With what speed did he throw it? Calculate the final & resultant velocity and acceleration.
In a collision between an alpha particle and an electron, what general considerations limit the momentum transfer
a jogger runs in a straight line with an average velocity of 5.1ms for 2.1 min and then with an average velocity of 4.9
a solid aluminum ingot weighs 92 n in air.a what is its volume?b the ingot is suspended from a rope and totally
Three forces act on a moving object. One force has a magnitude of 82.8 N and is directed due north. What must be the direction of the third force
what is a catapult ? what is the traditional use of a catapult ? when were catapults in greatest use ? what
A 20.0 kg mass at rests decays into a particle that is moving at 0.30c. What is the mass of this new particle
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