Tài liệu COMPARISON & EXERCISES

... “most” before the adjective clever cleverer/ more clever cleverest/ most cleverPAGE 8 COMPARISON A - Comparison with -er/-estclean - cleaner - (the) cleanestWe use -er/-est with the following ... thought. • This is even worse than that one. 1. Comparison of Equality (So sánh ngang bằng)When things being compared have equal characteristics, the comparison of equality is used.Examples: • ... boy is as tall as the girl.- To form the comparisons of equality using adjectives or adverbs, use the following formula:as adjectives/adverbs asPAGE 10 COMPARISON nhưnggreen - greener/greenest3....

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Tài liệu Physics exercises_solution: Chapter 01 ppt

... the angle between the directionvectors.b) Although the law of cosines could be used again, it's far more convenient to use the law of sines (Appendix B), and the angle is given by,1295.51180,5.51ly138ly76.225.6sin ... similar calculation shows that xyzyxzzxyxzyyzxzyxCBACBACBACBACBACBA  CBAand a comparison of the expressions shows that they are the same.b) Although the above expression could...

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Tài liệu Physics exercises_solution:Chapter 02 doc

... 2.26: a) x0 < 0, v0x < 0, ax< 0b) x0 > 0, v0x < 0, ax > 0c) x0 > 0, v0x > 0, ax < 02.51: a) From Eqs. (2.17) and (2.18), ... rest is s3.1332sm360.0sm80.4t2.95: For convenience, let the student's (constant) speed be v0 and the bus's initial position be x0. Note that these quantities are for separate ... m250s)0.10)(sm0.5(2221221 tayyat the moment the engine is shut off. To find the helicopter's maximum height use)(20202yyavvyyyTaking m2500y, where the engine shut...

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Tài liệu Physics exercises_solution: Chapter 03 doc

... b) Of the many ways to approach this problem, a convenient way is to use the same sort of "trick", involving double angles, as was used to derive the expression for the range along...

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Tài liệu Physics exercises_solution: Chapter 04 pdf

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Tài liệu Physics exercises_solution: Chapter 05 ppt

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Tài liệu Physics exercises_solution: Chapter 06 docx

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Tài liệu Physics exercises_solution: Chapter 13 ppt

... cos2)2(tωωtωmbAedtdxvtmbxand at down.slopes0near versusofgraph the;2,0  ttxmAbvt c) ,sin 2'cos4222)2(tωmbωtωmbAedtdvatmbxxand ... rod of length L gives a slight improvement to d=1.6 cm (neglecting the radii of the spheres in comparison to the length of the rod; see Problem 13.94).13.48: a) Solving Eq. (13.39) for I, ... for,)23(2xMkRIMkxaxwhere 2cm)21( MRII  has been used for the combination of cylinders. Comparison with Eq. (13.8) gives .2322kMπTωπ13.19:rad)42.2s)radcos((4.16cm)40.7()(a)...

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Tài liệu Physics exercises_solution: Chapter 14 pdf

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Tài liệu Physics exercises_solution: Chapter 15 pdf

... yv> 0. The portion of the curve to the left of the point is steeper, so ya > 0. (3) The point is moving down, and will increase its speed as the wave moves; yv < 0, ya< ... .21)(12221pxyFxxxFuxye)),sin( ωtkxkAxyand so)(sin21222pωtkxAFku and f) comparison with the result of part (c)with ,2222Fμωvωk  shows that for a sinusoidal wave ... horizontal, and yv = 0. As the wave moves, the point will move away from the x-axis, and ya>0. (5) The point is moving downward, and will increase its speed as the wave moves; 0.0, yyav(6)...

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