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A 1200 turn coil in a dc motor has an area per turn of 1.1 * 10-2m-2. The design for the motor specifies that the magnitude of the maximum torque is 5.8 N-m when the coil is placed in a .20 T magnetic field. What is the current in the coil?
A particular wire has a resistivity of 3.5 ? 10-8 ·m and a cross-sectional area of 3.9 ? 10-6 m2, What length of wire is required
An ?-particle has a charge of +2e and a mass of 6.64 × 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.75 × 106 V, what are the radius of its circular path
In a RLC circuit, the rms current is 7.00 A, the maximum voltage 230. V and the current lags behind the voltage by 53.0 degrees. Find the average power dissipated in the circuit
A small, 300 {rm g} cart is moving at 1.30 {rm m/s} on an air track when it collides with a larger, 3.00 {rm kg} cart at rest. After the collision, the small cart recoils at 0.890 {rm m/s}.
In beta decay, a neutron decays into a proton, an electron, and a neutrino, What is the maximum energy that the electron can have? The neutrino?
Two plates separated by a distance 18.3 mm are charged to a potential difference of 7.25 volts, Using the concept of work-energy, calculate the change in kinetic energy
An object is placed 6.00cm to the left of a converging lens of focal length 8.00 cm. obtain the position of the final image
An indestructible bullet 1.85 cm long is fired straight through a board that is 11.10 cm thick. The bullet strikes board with a speed of 455m/s and emerges with a speed of 279m/s. (To simplify, suppose that the bullet accelerates only while the fr..
A pair of in-phase stereo speakers is placed side by side, 2m apart. You stand directly in front of one of the speakers, 5m from the speaker. What do you hear.
You are standing on a scale inside an elevator. The scale reads exactly your weight. What could be the velocity of the elevator, What is the acceleration of the elevator
A car of mass 2800 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, compute the velocity of the stuck-together car and truck
An archeological specimen containing 8.7 g of carbon has an activity of 1.8 Bq. How old (in years) is the specimen
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