(a) What energy is dissipated by a lightning bolt having a 21,000 A current, voltage of 121 MV, and a time duration of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water with a specific heat of 4184 J/(kg · °C) and a latent heat of vaporization of 2256 x 103 J/kg? kg
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- A teapot with a surface area 9 325 cm2 is to be plated with silver. It is attached to the negative electrode & an electrolytic cell containing Silver nitrate (Ag+ NO3-). The cell is Powered by a 12.0- resistance battery and has a 의 son If the density & silver is 1.05 x 104 kg/m³, Over what time Interval does a 0-133-mm Jayer of Silver build up on the teapot?!! 의When the switch is in position a below, the battery charges the positive parallel plate of the capacitor to Q = 900 µC. The switch then swings to position b, the charge Q flows through the resistor R, and the capacitor’s stored energy U is turned into heat energy. Assume the capacitor has capacitance C = 8.00 µF. Use conservation of energy to find the amount of heat (in Joules) produced during the capacitor’s discharge.(a) What is the cost of heating a hot tub containing 1510 kg of water from 10.0°C to 40.0°C, assuming 75.0% efficiency to take heat loss to surroundings into account? The cost of electricity is 9.00¢/(kW • h) and the specific heat for water is 4184 J/(kg · °C). $ (b) What current was used by the 220 V AC electric heater, if this took 4.95 h? Additional Materials O Reading
- A short circuit in a 120 V appliance cord has a 0.35 Ω resistance. Calculate the temperature rise of the 2.5 g of surrounding material, assuming their specific heat capacity is 0.200 cal/(g·ºC) and that it takes 0.0500 s for a circuit breaker to interrupt the current.What is the heat produced in a conductor in 4.3 minutes if there is a current of 1.8 A and a resistance of 26 Q? Round the final answer to a whole number.(a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ₁ = 2.7 V, 8₂-5.3 V, and r₁ r2 = 3.9 Q. (b) What is the rate at which thermal energy appears in R? www.i R (a) Number (b) Number ww MI -48₂ i N Units Units <