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Suppose half the mass of a 20 kilogram bicycle is in its wheels and that the wheels are effectively rings. Determine the total kinetic energy of the bike when it is traveling at 7.28 m/s?
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 470m to be the other plate. How much charge can the cloud hold before the dielectric strength of the air is ex..
An automobile moves on a level horizontal surface in a circle radius 30 m. The coefficient of friction between tires and road is .50. Find the maximum speed with which car can round the curve
If 35.0 MW of power at 43.2 kV (rms) arrives at a town from agenerator via 3.10 Ω transmission lines. Calculate the emf at the generator end of the lines
A rigid conducting loop has the shape of an equilateral triangle with sides a = 42 cm. Each side of the loop has a resistance of R = 3 W. An exterior torque forces the loop to rotate at constant speed at an angular rate of 7 cycles per second about i..
A dog searching for a bone walks 2.20 m south, then 8.20 m at an angle 30.0° north of east, find the dog's resultant displacement vector
A 28 kg child plays on a swing having support ropes that are 1.80 m long. A friend pulls her back until the ropes are 43 from the vertical and releases her from rest.
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
A 0.40 kg ball, attached to the end of a horizontal cord, isrotated in a circle of radius 1.6 m on africtionless horizontal surface. What is the maximum speed the ball can have
Consider a tiny bead of mass 10-6 g on a short wire of length 10-6 m as equivalent to the quantum model of ‘particle in a box
A 1,216-kg car drives through a turn with radius 42 m. The coefficient of static friction is 0.9 and the coefficient of kinetic friction is 0.52. find the maximum speed (constant) at which the car can negotiate the turn
the minimum stopping distance for a car traveling at a speed of 30 ms is 60 m including the distance traveled during
A proton and an Au11+ are moving with equal velocities perpendicular to a uniform magneticfield. The Au11+ has 11times the charge as the proton and has 197times its mass. The ratio of the acceleration of theAu11+ to that of the proton is what?
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