A light bulb, having a tungsten filament, draws 0.5 A at 110 V. The cold resistance of the filament is 200 at 20 °Č. At this temperature the temperature coefficient of resistance (for tungsten) is 0.005 °C. Determine the operating temperature of the bulb.

Q: 9 and 10. Thanks.

A: 9.The equation for dot product

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Q: Not understanding

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Q: Problem #1) Determine the moment of forces about point 0. F3=75 lb X- 15⁰ 6'-0" Y F₂ = 50 lb 90° Y…

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A: Give Thermal conductivity = 100j/s-mC  Delta T = 21- 12 ° C = 9 ° c

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A: T1=2500k. T2=1900k.

Q: 6&7 please

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Q: thanks for the help

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Q: A convex lens has a focal length of 17 cm. A candle with a height of 4 cm is 10 cm

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