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A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. He reports hearing two successive resonances at 53.0 Hz and 58.5 Hz. How deep is the well?
A player bounces a 0.47 kg soccer ball off her head, changing the velocity of the ball from i = (9.2 m/s) + (-2.7 m/s) to f = (6.1 m/s) + (5.5 m/s). The ball is in contact with the player's head for 6.70ms.
What is the amount of the normal force on the charge on the surface in Newtons, when including both the weight of the object and the electric force on it?
A world class sprinter accelerates to his maximum speed in 3.80 s. He then maintains this speed for the remainder of a 100 m race, finishing with a total time of 10.30 s. What is the runner's average acceleration throughout the first 3.80 s.
The generator at a power plant produces AC at 24000 V. A transformer steps this up to 345,000 V for transmission over power lines. how many turns must there be in the output coil
what is the final equilibrium temperature of the system?
If a 4-engine jet accelerates down the runway at 5m/s2 and 3 of the jet engines fail, how much acceleration will the other one produce.
Find the resistance between points A and B. A car starts from rest on a curve with a radius of 130 m and accelerates at 0.500 m/s^2. How many revolutions will the car have gone through as the magnitude of its total acceleration is 2.50 m/s^2.
A pipe open at one end has a fundamental frequency of 256 Hz. A second pipe,identical to first pipe, is shortened by cutting off a portion of the open end. When both pipes vibrate at their fundamental frequencies, a beat frequency of 12 Hz is heard..
A see-saw board is supported at its center by a fulcrum A 25 kg person sits 80 cm from center. How much force does the fulcrum exert on board
You make a capacitor by cutting the 15.5 cm--diameter bottoms out of two aluminum pie plates, separating them by 3.40 mm, What's the capacitance of your capacitor
a 3.0E6 resistor is connected in series with an initailly uncharged 0.28E-6 F capacitor. What is the maximum current in the circuit and when does it occur
A small drop of oil is suspended motionless in the air by a uniform electric field that is directed upward and has a magnitude of N/C, What is the mass of the drop
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