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Q. A pendulum has a period of 0.80s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?

Q. Two large parallel metal plates are 2.2 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces. Take the potential of the negative plate to be zero. If the potential halfway between the plates is then +5.5 V, what is the electric field (in V/m) in the region between the plates?

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