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The ball thrower, who has a mass of 100 kg, can throw a 500 g ball with a speed of 10 m/s. The distance through which his hand moves as he accelerates the ball forward from the rest until he releases it is 1.0 m. What constant force must the athlete exert on the ball to throw it with this speed?
In a 290-turn automobile alternator, the magnetic flux in each turn is %u03A6B = 2.50 10-4 cos %u03C9t, Determine the maximum emf in the alternator
An athlete executing a long jump leaves the ground at a 35° angle and lands 7.30 m away.
A solar cell generates a potential difference of 0.320 V when a 445.0 ? resistor is connected across it and a potential difference of 0.504 V when a 945.0 ? resistor is substituted. What is the emf of the cell
Caught in an avalanche, a skier is fully submerged in flowing snow of density 113 kg/m3. What percentage of the gravitational force on the skier is offset by the buoyant force from the snow
A silver coin has the mass of 17.75g. If the atomic mass of silver is 107.868u, how many silver atoms are in the coin
The work done by an external force to move a -7.75 µC charge from point a to point b is 25.0 ? 10-4 J. What is the magnitude of the potential difference between a and b
A thin film of oil (n = 1.27) is located on smooth, wet pavement. When viewed perpendicular to the pavement, How thick is the oil film
The center-tap to high peak voltage to each side is 22.0 V. Two silicon diodes are used to make a full-wave rectifier. Calculate the output DC voltage and the ripple voltage
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter, calculate the potential difference between its feet
What are new charge on spheres - Two insulated charge Cu spheres A and B OF IDENTICAL size have charge qa and -3qa
A 42 kg child is riding on a carousel (merry-go-round) at a constant speed of 6 m/s. What is the magnitude of the change in the child's momentum |Δp with arrow| in going all the way around (360°)?
A group of hikers hears an echo 5 s after shouting. If the temperature is 16.0°C, how far away is the mountain that reflected the sound wave.
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