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A busy street has 100 cars/minute passing a given point during a weekday producing a SIL of 70 dB; if the number is reduced to 25 cars/minute during the weekend, what is the resulting SIL?
a spherical void of radius r has cut inside the sphere, find the electric field inside the void if its center is displaced by vector R
A circular armature coil is used in a motor with a uniform magnetic field of 1.80 T. The coil has a diameter 95 cm, how much current is flowing throught the motor
For two concentric conducting rings the inner of the large ring in 12 cm and the outer radius of the smaller ring is 4 cm, Calculate the electric potential half way between the two rings 8 cm away from the center of the rings
Calculate the deBroglie wavelength of electrons that have been accelerated by 50,000 Volts (Remember the relation between energy and momentum). The answer is 5.486*10^-12 meters, but I'm not sure how to get it.
Determine the total impedance, phase angle, and rms current in an LRC circuit connected to a 9.0 kHz, 800 V (rms) source if L = 32.0 mH, R = 9.70 k, and C = 5000 pF? Impedance= 9.71 kilo ohms phase angle= ? degrees rms current = 82.3893 mA Can someon..
A galvanometer has a full-scale current of 0.092 mA and a coil resistance of 59 Ω. This instrument is used with a shunt resistor to form an ammeter that will register full scale for a current of 63 mA. Decide the resistance of the shunt resistor.
A solid concrete wall 4.0 m X 2.4 m X 30 cm thick has a thermal conductivity of 1.3 W/(mK) and separates a basement at 18C from the ground outside at 6C. How much heat flows during the walls in one hour?
A racecar accelerates uniformly while starting from rest, find the total linear acceleration of a point on the outside of the tire when the car has traveled a distance of 200 m
A playground merry-go-round of radius R = 1.80 meter has a moment of inertia I = 240 kg•m2 and is rotating at 8.0 rpm about a frictionless vertical axle. Find the new angular speed of the merry-go-round
zorch, an arch enemy of superman, decides to slow earth's rotation to once per 27.0 h by exerting an opposing force at, How long must zorch push with this force to achieve his goal
An electron, starting from rest, accelerate through a potential difference of 510 Volt. Obtain the final de Broglie wavelength of the electron
A point charge of +5.6 µC is placed 0.39 meter from a second point charge of -6.0 µC. Obtain the absolute magnitude of the force on each charge
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