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Q4. a. The resistance, R ohms of copper wire at t°C is given by:

R = R₀ (1 + αt) where R₀ is the resistance of the wire at 0°C and α is the temperature coefficient of resistance of copper.

Calculate the values of R₀ and α, given that R = 21.76 ohms when t = 22℃ and R = 22.40 ohms when t = 30℃ (10)

b. The formula T = 2π√((K² + h²)/gh) gives the period T of a compound pendulum. Transpose the formula to obtain g. (6)