Một bóng đèn có ghi 220v-100w
a) Hãy nêu ý nghĩa của các số ghi trên bóng đèn
b) Tính cường...
Physics, 18.10.2021 18:30 cassiuspricerules
Một bóng đèn có ghi 220v-100w
a) Hãy nêu ý nghĩa của các số ghi trên bóng đèn
b) Tính cường độ dòng điện qua bóng đèn và điện trở của nó khi đèn sáng bình thường
Answers: 1
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Which type of circuit is becoming more common in residential electrical design and construction? a. hazardous-area circuit b. three-phase circuit c. 480-volt circuit d. communication circuit
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The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
Answers: 2
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