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You have a summer job working for a major manufacturer of audio components. The lead designer of loudspeakers asks you to make a calculation for a prototype speaker. The speaker coil consists of 200 turns of wire, 4.0 centimeter in diameter. The current in the speaker will be 2.5 Amp when the force on the speaker coil is 14.8 Newton. Find what strength magnetic field will give this force?
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a point dipole P is imbedded at the center of asphere of linear dielectric material (with radius R and dielectricer ). find the electric potential inside and outside the sphere
A loudspeaker is generating sound in a room. At a certain point, the sound waves coming directly from the speaker (without reflecting from the walls) create an intensity level of 74.1 dB. The waves reflected from the walls create, by themselves, an i..
Ceres, the smallest identified dwarf planet in the Solar System, has a radius R = 480 km and an acceleration due to gravity on its surface of magnitude g = 0.27 m/s2. Use these numbers to calculate the escape speed from the surface of Ceres.
A 246 kg wooden raft floats on a lake. as a 85 kg man stands on the raft, it sinks 5.0 cm deeper into the water. When he steps off, the raft vibrates for a while.
A 20.0 , 12.0 , and 8.00 resistor are connected in parallel to an emf source. A current of 6.00 A is in the 12.0 resistor. Calculate the equivalent resistance of the circuit. What is the potential difference across the source? Answer in units of V
A motor pulls a ski tow rope moving 10 skiers at a time (each 75kg) up a slope of 20 degrees at a constant 2m/sec speed. find the minimum power the motor must have to accomplish this
An electron is suspended at a distance of 1.36 cm above a uniform line of charge. What is the linear charge density of the line of charge
You are piloting a small plane that can maintain an air speed of 136.5 kt (knots, or nautical miles per hour) and you want to fly due north (azimuth = 000°) relative to the ground.
find the transformation matrix r that describes a rotation of 90 degrees about an axis from the origin through the
question 1part 1a knight of round table fires off a vat of burning pitch from his catapult at 15.2 ms at 34 above
A woman flying aerobatics executes a maneuver r = 380m, Determine the value of the centripetal force acting on the woman flying the airplane when at the top of the loop
Two train cars are on a straight, horizontal track. One car starts at rest and is put in motion with a constant acceleration of 1.80 m/s2. Where will the cars collide
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