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  1. D

    The circumference of a regulation basket ball is 75 cm and the regulation gauge pressure is 59 kPa.?

    The ball is inflated to regulation in the morning when the temperature is 0 *C. Later when the temperature is 20 *C the pressure in the ball is too high. What mass of air must be let out so that the pressure is again regulation. The molar mass of air is 29 g/mol.
  2. D

    A lightning flash may transfer up to 30 C of charge through a potential difference

    of 10^8 V.? (a) how much energy does this involve? State your answer in eV. (b) for how long could this much energy light a 60 W bulb?
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