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Why can gamma rays pass through or penetrate solids? gamma rays have large mass. gamma rays have low velocity. gamma rays have high velocity.
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What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?
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Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)
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