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An object with a charge of -3.8 µC and a mass of 0.046 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight.
(a) Find the direction and magnitude of the electric field.
(b) If the electric charge on the object is halved while its mass remains the same, find the direction and magnitude of its acceleration.
A "biconvex" lens is one in which both surfaces of the lens bulge outwards. What is the focal length f of this lens in air
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An airplane is flying with a velocity of 81.0 m/s at an angle of 23.0 degrees above the horizontal. How far from the dog will the suitcase land in m
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