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Q16: The capacitors are completely discharged in the
Q23: Three point charges,two positive and one negative,each
Q28: By operating a reversible heat engine with
Q29: A bolt of lightning strikes the ground
Q38: A concave mirror has a focal length
Q38: A step-up transformer has an input voltage
Q43: A proton (mass = 1.67 × 10−<sup>27</sup>
Q43: An ideal gas is allowed to undergo
Q50: A positive point charge q is placed
Q56: When gravitational,magnetic and any forces other than