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Q1. Two 75.0 W (120 rm V) light bulbs are wired in series, then the combination is connected to a 230 V supply. How much power is dissipated by each bulb?

Q2. A 1.78 m long air column is open at both ends. The frequency of a certain harmonic is 828 Hz, and the frequency of the next-higher harmonic is 920 Hz. find out the speed of sound in the air column.

Q3. A cylindrical specimen of this alloy 565 mm long is pulled in tension. What is the radius of the specimen if an elongation of 1.13 mm occurs while a load of 28.2 kN is applied?

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