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A length of wire has a total resistance of 120 ?. If cut up into N identical pieces, then wired so that those N pieces are in parallel, the resulting monstrosity has total resistance 1.875 ?. How many pieces did the original wire get cut up into?
A 32.0 kg hammer strikes a steel spike 2.70 cm in diameter while moving with speed of 24.0 m/s. The hammer rebounds with speed 11.0 m/s after 0.110 s. What is an average strain in the spike all through the impact.
If you place the box on a dolly of mass 4.7 and with coefficient of rolling friction 2.0×10−2, illustrate what horizontal acceleration would that 154 force provide?
What is the concentration of the Cd in the soil if the city of Des Moines adds 3 tons of compost/ acre-6 inches given the compost contains 50 ppm Cd
Person a is 20 ft to the right of person b. Person a recieves a ball and throws it 18.9 m away, angle of 25 degree celcius to the right horizontal, what is his average velocity(magnitude and direction) if he takes a straight path
What is mechanical energy
Assume you are swimming in a river while a friend watches from the shore. In calm water, you swim at a speed of 1.25 m/s. The river has a current that runs at a speed of 1m/s.
A 0.50-?F and a 1.4-?F capacitor (C1 and C2, respectively) are connected in series to a20-V battery, lculate the potential difference across each capacitor? V1 and V2
A coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 2.00 cm and 1000 turns/meter. The current in the solenoid changes as I = (5.00 A) sin(120t). Find the induced emf in the 15-turn coil as a function of time.
In a control system, an accelerometer consists of a 4.99-g object sliding on a calibrated horizontal rail, Find the force constant of the spring required for the calibration to be correct
A long pair of wires conducts 28.10 A of dc current to, and from, an instrument. If insulated wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field d = 11.2 cm from their midpoint, in their plane.
A 3.00-kg object is fastened to a light spring, with the intervening cord passing over a pulley. The pulley is frictionless, and its inertia may be neglected.
A 1500 kg car moving east at 26 m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
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