Physics

Physics, 27.06.2019 12:20, toricepeda82

Select the best answer for the question.5. which technology is used to adjust the load connected to solar cells and increase their energyoutput? o a. alternating currento b. electromagnetic inductiono c. maximum power point trackingo d. direct current

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Mathematics, 30.09.2019 21:00, nforrestall

Question part points submissions used consider the following configuration of solar photovoltaic arrays consisting of crystalline silicon solar cells. there are two subsystems connected in parallel, each one containing two cells. in order for the system to function, at least one of the two parallel subsystems must work. within each subsystem, the two cells are connected in series, so a subsystem will work only if all cells in the subsystem work. consider a particular lifetime value t0, and suppose we want to determine the probability that the system lifetime exceeds t0. let ai denote the event that the lifetime of cell i exceeds t0 (i = 1, 2, , 4). we assume that the ai's are independent events (whether any particular cell lasts more than t0 hours has no bearing on whether or not any other cell does) and that p(ai) = 0.8 for every i since the cells are identical. using p(ai) = 0.8, the probability that system lifetime exceeds t0 is easily seen to be 0.8704. to what value would 0.8 have to be changed in order to increase the system lifetime reliability from 0.8704 to 0.92? [hint: let p(ai) = p, express system reliability in terms of p, and then let x = p2.] (round your answer to four decimal places.)

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Geography, 30.10.2019 19:31, lukasconway7644

Which of the following statements about solar energy is correct? question 11 options: a) newer technologies for solar energy reduce the rate of use of fossil fuels. b) more effective and efficient technology causes an increase in the price of using solar energy. c) solar heating is not dependent upon a steady supply of sunshine. d) the equipment required for solar heating is inexpensive.

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