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Q3: The electric field between oppositely-charged parallel plates
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Q56: A sack of potatoes weighing 200 N
Q68: Water at 4°C will sink to the
Q68: When a gas in a container is
Q69: The average speed of electrons flowing though
Q111: Compared with a mercury barometer,the column height
Q116: Which emits radiation of the highest frequency?<br>A)a
Q123: The acceleration of a rocket increases as