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(a) $\mathrm{A} 0.140$ -kg baseball, pitched at $40.0 \mathrm{m} / \mathrm{s}$ horizontally and perpendicular to the Earth's horizontal $5.00 \times 10^{-5} \mathrm{T}$ field, has a 100 -nC charge on it. What distance is it deflected from its path by the magnetic force, after traveling $30.0 \mathrm{m}$ horizontally? (b) Would you suggest this as a secret technique for a pitcher to throw curve balls?
(a) $\mathrm{A} 0.140$ -kg baseball, pitched at $40.0 \mathrm{m} / \mathrm{s}$ horizontally and perpendicular to the Earth's horizontal $5.00 \times 10^{-5} \mathrm{T}$ field, has a 100 -nC charge on it. What distance is it deflected from its path by the magnetic force, after traveling $30.0 \mathrm{m}$ horizontally? (b) Would you suggest this as a secret technique for a pitcher to throw curve balls?
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A 150-g ball containing 4.00 $\times$ 10$^8$ excess electrons is dropped into a 125-m vertical shaft. At the bottom of the shaft, the ball suddenly enters a uniform horizontal magnetic field that has magnitude 0.250 T and direction from east to west. If air resistance is negligibly small, find the magnitude and direction of the force that this magnetic field exerts on the ball just as it enters the field.
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