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Example 139 Calculate percentage error in determinationtime period of a pendulumofwhere, l and g are measured with1% and2% errors.

Answer»

T= 2π √l/gSo Δt/t * 100 = [1/2 Δl/l + 1/2 Δg/g]*100( 2 π is constant so it will be ignored)Hence by solving:0.5% +1% = 1.5%

how can calculate 1/2



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