Assume that when you ride on your 7.60-kg bike the weight, Ask an Expert

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Q1. Assume that when you ride on your 7.60-kg bike the weight of you and the bike is supported equally by the two tires. If the gauge pressure in the tires is 78.5 lb/in2 and the area of contact between each tire and the road is 7.13 cm2, what is your weight?

Q2. A coil of Nichrome wire is 22.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C.

(a) If it carries a current of 0.520 A, what is magnitude of the electric field in the wire?

(b) If it carries a current of 0.520 A, what is power delivered to it?

(c) If the temperature is increased to 320°C and potential difference across the wire remains constant, what is the power delivered?

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Category:- Physics
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