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Q1 has 50 electric field lines radiating outward and Q2 has 150 field lines converging inward.What is the ratio Q1/Q2?
Q4: In the afternoon,the decibel level of a
Q5: A swimming pool heater has to be
Q7: According to the first law of thermodynamics,for
Q22: The volume of an ideal gas changes
Q24: An electric car is designed to run
Q29: A waterfall is 70 m high.What is
Q47: The heating coil of a hot water
Q47: The resistance of a platinum wire is
Q53: You measure a 20.0-V potential difference across
Q71: If C<sub>1</sub> = 30 µF,C<sub>2</sub> = 25