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1. A 1-kΩ load needs 10 mA to operate correctly. Design a practical power source to provide the needed current. The smallest source resistance you can practically design for is 50 Ω, but you can add any other series resistance if you need to.
2. A practical source delivers 25 mA to a 300-Ω load. The source delivers 5 V to a 100-Ω load. Find the maximum power available from the source.
from the top of a 75m building, a 1.00 kg ball is thrown downwards with initial velocity of 8.00 m/s. what is the mechanical energy lost due to air resistance
A 60 kg block is pushed 5m up a fricitonless incline to a height 1m above the ground. How much work is done by the person on the block pushing it up the incline
An RLC circuit consisting of a 350 ohm resistor, a 2.4 µF capacitor and a 41.2 mH inductor is driven by a variable-frequency AC source with 120 Vrms. Compute the resonance frequency
a stationary billiard ball mass 0.17 kg is struck by an identical ball moving at 3.0 ms. after the collision the second
A diverging lens has a focal length of 40.7 cm. If an object is 31 cm from the lens, what is the image distance? Answer in units of cm. Also, What is the magnitude of the magnification for this lens?
A uniform solid disk with a mass of 23.8 kg and a radius of 0.712 m is free to rotate about a frictionless axle. Forces of 92.0 and 124 N are applied to the disk. Taking the clockwise direction to be the negative direction, what is (a) net torque pro..
A 5.43 kg block free to move on a horizontal, frictionless surface is attached to one end of a light horizontal spring. find the speed of the block at the equilibrium position of the spring
The sound level 22 m from a loudspeaker is 66 dB. What is the rate at which sound energy is produced by the loudspeaker, assuming it to be an isotropic source
Larry tosses a volleyball to his wife, Lise, who catches it at the same height from which it was tossed. what was the initial horizontal velocity
Three deer, A, B, and C, are grazing in a field. Deer B is located 63.9 m from deer A at an angle of 51.4 ° north of west. What is the distance between deer A and C
Two cylindrical bars, each with diameter of 2.00 cm, are welded together end to end. One of the original bars is copper and is 0.380 m long. The other bar is iron and is 0.190 m long. What is the resistance between the ends of the welded bar at 20°C?
A 1500kg car skids to a halt on a wet road where coefficient of friction = 0.46. How fast was car traveling if it leaves 68m long skid marks.
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