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A battery is connected in series with a2.7 Ω resistor and a 15 mH inductor. The maximum current in the circuit is160 mA. Find the following.
a) the time constant of this circuitb) the emf of the battery
Tony pulls his cousin Ann in a sled on an icy surface (no friction) with a force of 60N at an angle of 60 degrees upward from the horizontal
You have a cylindrical cup of water that springs a leak 5 cm below the surface of the water. What is the velocity of the water coming out of the hole
A 200g ball on a 70-cm-long string is swung in a vertical circle about a point 200 cm above the floor. What was the tension in the string an instant before it broke
A red laser from the physics lab is marked as producing 632.8-nm light. When light from this laser falls on two closely spaced slits, What is the wavelength of light produced by the pointer
An electric ceiling fan with blades of diameter 0.760m is rotating about a fixed axis with an initial angular velocity of 0.200 rev/s. Through how many revolutions has the blade turned in this time interval
A garden has a circular path of radius 50{\rm m} . John starts at the easternmost point on this path, What is the magnitude of John's displacement
A thin, horizontal copper rod is 1.10 m long and has a mass of 203 g. What is the minimum current in the rod
a 1000kg car experiences a total power of 150hp (horsepower) if it starts from rest what is the magnitude of the velocity of the car in miles per hour 10s later
Three successive resonant frequencies in an organ pipe are 865, 1211, and 1557 Hz. What is the fundamental frequency
A rocket is launched at an angle of 58.0° above thehorizontal with an initial speed of 97m/s. The rocket moves for 3.00 s along its initial line of motionwith an acceleration of 32.0m/s2. At this time, its engines fail and the rocketproceeds to mo..
Using a ball that has unknown mass m. You plot your data in the form of f2 versus M/L, with f in rev/s,M in kg, and L in m. calculate the mass m of the ball
Air streams horizontally past a small airplane's wings such that the speed is 63.0m/s over the top surface and 53.0m/s past the bottom surface. What is the direction of the net vertical force (including the effects of gravity) on the airplane
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