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A proton is at the origin and an electron is at the point x= 0.35nm , y= 0.34nm .Find the electric force on the proton.
A point charge with q1 = +1.9 C is located at x = ?3.0 m, y = 0, and a second point charge with q2 = +6.5 C is at x = +1.0 m, y = +2.0 m. (a) What is the force exerted by q1 on q2? magnitude N direction ° counterclockwise from the +x-axis (b) What..
A bullet is fired through a board 10.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board, Find the acceleration of the bullet as it passes through the board
The projection lens in a certain slide projector is a single thin lens. A slide 24.3 mm high is to be projected so that its image fills a screen 1.86 m high. Determine the focal length of the projection lens
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
A rectangular barge, 4.0 m long and 1.5 m wide, floats in fresh water. (a) Find out how much deeper it floats when its load is a 380-kg horse. (b) If the barge can only be pushed 15 cm deeper into the water before water overflows to sink it, how m..
A ball with a vertically downwards initial velocity v(0) = 3 m/s collides with a fixed inclined surface. find the velocity of the ball after it rebounds
One gallon of gasoline contains 3.1 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
Two bars of identical mass are at 29 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/ (kg • C°).
A person with a weight of 280 lb stands on two feet wuth their weight equally distributed between the shoes, What is the pressure on each show independently
Find the magnetic vector potential inside and outside a slab of thinkness 2a, extending infinitely in x and y directions. Use Coulomb's gauge. J= -J e^-abs(z)/a)
when the switch is closed and the capacitor is fully charged, how do you find the voltage across a capacitor
An ambulance moving at 37 m/s sounds its siren whose frequency is 500 Hz. What frequency does a person in the car hear as the ambulance approaches the car
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