If the bar magnet is flipped over and the south pole is brought near the hanging ball, the ball be 1) i'am not sure 2) unaffected by the magnet.3) attracted to the magnet 4) replaced by the magnet.

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A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor