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What is the value of tangential acceleration in U.C.M.? iii. The surface tension of water at 0℃ is 75.5 dyne/cm. Find surface tension of water at 25℃. [ for water = 0.0021/℃] |
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Answer» In uniform circular motion (U.C.M), It's angular VALOCITY is constant. a = dw/dt. but, w = constant. ∴ a = 0. Thus, the value of TANGENTIAL acceleration in uniform circular motion is zero. t 1 = 0⁰C t 2 = 25⁰C α = 0.0027/⁰C T = T0 (1 – α∆t) = T0 [1 – α (t2 – T1 )] T = T0 [1 – α (t2 – t1 )] T = 70 [1 – 0.0027 (25 – 0)] = 70 [1 – 0.0027 × 25] = 70 × 0.9325 ∴ T = 65.275 dyne/cm please mark me brain mark list |
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