Afirecracker is placed in the middle of a cluster of stationary billiard balls. the firecracker-billiard ball system sits on a frictionless surface. as the firecracker explodes, the balls scatter. assuming no air resistance, what is the momentum of the system after the explosion of the firecracker? a) greater than the momentum of the system before the explosionb) equal to the combined speed of the ballsc) equal to the mass of the ballsd) zero
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Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction
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Acorporation gives out its profits as dividends paid to whom?
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Afirecracker is placed in the middle of a cluster of stationary billiard balls. the firecracker-bill...
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