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Q20: The compressions and rarefactions in a longitudinal
Q31: Food is cooked faster in a pressure
Q45: Electric potential is the ratio of electric
Q58: Magnet A has twice the magnetic field
Q59: It is commonly thought that a can
Q82: As water in a confined pipe speeds
Q90: An ideal Polaroid will transmit 50% of
Q99: A galvanometer calibrated to read current is<br>A)an
Q105: Like kinds of magnetic poles repel while
Q138: When a suction cup sticks to a