Find the velocity of the third piece
42 g firecracker at rest at the origin when it explodes into three pieces the first with mass 12 g moves along the x axis at 35m/s the second mass is 21g moves along the y axis at 29m/s find the velocity of the third piece.
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A hollow conducting spherical shell of radius 1.20 cm carries a charge of -5.20 nC. What is the electric field at a distance of 1.50 cm from the center of the shell?
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Where is the image of the robin and how long is the image? (hint: remember that the focal length is half the radius, and focal length is negative for a convex mirror)
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