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if you are looking at a sketch of an electric field withoutany numbers, how do you estimate where the electric field is zero?
A small device based on the confinement of a proton in a 1 dimensional box is found to have a ground (i.e. n = 1) level energy of 16.9 keV. Determine the width of the box
A 47.0-g golf ball is driven from the tee with an initial speed of 50.0 m/s and rises to a height of 25.6 m. Neglect air resistance and determine the kinetic energy of the ball at its highest point
Four vectors A,B,C ,D and are shown (not to scale). Vector A has magnitude 23.0 and acts at an angle of 14.7 degrees with respect to the positive x axis. find the magnitude and direction of the resultant vector R
A NASCAR racecar rounds one end of the Martinsville Speedway. What is the force responsible for the centripetal acceleration in this case
An x-ray photon is scattered from a free electron (mass m) at rest. The wavelength of the scattered photon is ?', and the final speed of the struck electron is v. Through what angle w is the photon scattered
A uniform stick d = 1 m long with a total mass of 251 g is suspended vertically from a frictionless pivot at its top end. A wad of putty of mass 20 g is moving horizontally with speed v. It strikes and sticks to the stick at a distance 0.75 m from..
Calculate the total time for car A to travel the 15.0 m and after the collision, car B moves to the right at a speed of 4.8 m/s. Calculate the velocity of car A after the collision.
A high-voltage power line carries a current of 120A at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 63 degrees below the horizontal. Find the magnitude of the magnetic force exerted on a 290m length..
A bouncy ball is dropped from a heigh h above a floor. If every bounce robs the ball of 6.7% of its kinetic energy just before the bounce, how high will it reach before its eleventh bounce
Find out the critical angle for the glass-synthetic interface (same as for the glass-diamond interface). Sketch a picture of the incoming ray as it interacts will all subsequent interfaces.
A +5.0-microC charge experiences a 0.46-N force in the positive y direction. If this charge is replaced with a charge-2.7-microC, find the magnitude of the force in this case.
a modern house is wired for 115 V, and the current is limited by circuit breakers to a maximum of 135 A. find the maximum electrical power the house can consume
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