ch1解答

ch1解答...

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ex 18. (a) 15.69 ; (b) 25.9 20. (a) 6.2 × 10 3 ; (b) 2.73 × 10 1 ; (c) 6.00000 ×   10 2 22. 243 ± 4.5 cm 2 36. [ A ] = LT x 2 , [ B ] = LT x 4 37. (a) (2.68 m , 2.25 m) , (b) ( –1.15m , –1.38m), (c) ( –1.80 m , 1.26m), (d) (1.99m , –1.67m) 38. (a) 5.00 m , 53.1° ; (b) 3.61 m , 124° ; (c) 2.92 m, 329° ; (d) 2.24 m , 206° 39. [ ω ] = T x 1 , [
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Unformatted text preview: k ] = M T x 2 45. (a) 4.96 × 10 2 ; (b) 2.6 × 10 4 PRO 2.a α v 2 / r 3.T = k x m y = M x T x 2x M y . The unit of k is N / m, so [ k ] = MT x 2 Equating the exponents : 1 = –2x ; 0 = x + y. Thus x = –1/2 and y = +1/2 and so T = C (m / k) 1/2 4.x α at 2...
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