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  1. ...between O and P, the soft sound at Q is the second order destructive interference. Thus, 0.25 = (2 - (1/2)) 入 where 入 is the wavelength...

  2. ... "at rest" or in "constant motion at uniform speed". In order words, an observer cannot tell, just by performing physical...

  3. 5. (a) Force on wall = -[0.5 x (-4 - 5)/0.4] N = 11.25 N (b) Force on ground = -[0.5 x (0 - 5)/0.4] N = 6.25 N 6. (a) Use conservation of momentum 500 x 30 = 400 x 50 + 100v where v is the ejected velocity of the engine hence, v = -50 m/s (b...

  4. The trajectory of the motion of an object depends on the direction of the applied force and the initial condition of the object. Without such information, you cannot tell the exact path of the object.

  5. ...3/3! + ..... When γt << 1, the higher order terms can be neglected, hence, e^(-γt) = 1 - γt

  6. ... = 811 N (c) The medial deltoid muscle needs to contract in order to give the necessary torque. 2.(e) Assume the pitch is completed...

  7. ...graph than train C. ∴ average velocity over t = 0-30s in ascending order : C < B < A c. From...

  8. ...electricity: (a) In contrast to current electricity that deals with high current ( in order of Amperes) and low voltage (in order of several volts to hundred ...

  9. ...1/2)] (1 - v^2/c^2)^(-1/2) = 1 + (1/2)(v/c)^2 - (3/8)(v/c)^4 + higher order terms in (v/c) When v << c, the...

  10. ... per metre = 1/(3.533x10^-6) = 283,000 (iii) Let m be the order larger than 2 for the longer wavelength (636 nm) that overlapping...