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Two simple harmonic motions, yı = A sinwt and y2 = A coswt are superimposed on a particle of mass m. The total mechanical energy of the particle is :

A(1/2)mw 2 A 2

Bmw 2 A 2

C(1/4)mw 2 A 2

DZero

Answer:

B. mw 2 A 2


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സൂര്യഗ്രഹണത്തിനു കാരണമാവുന്ന ശരിയായ ക്രമീകരണം കണ്ടെത്തുക.

  1. ഭൂമിക്കും സൂര്യനുമിടയിൽ ചന്ദ്രൻ വരുന്നു
  2. ചന്ദ്രനും സൂര്യനുമിടയിൽ ഭൂമി വരുന്നു
  3. സൂര്യനും ഭൂമിക്കുമിടയിൽ ബുധൻ വരുന്നു
  4. ചന്ദ്രനും ഭൂമിക്കുമിടയിൽ സൂര്യൻ വരുന്നു.

    Which of the following statements are correct?

    1. (a). For a lens the first principal focus is the position of the object whose image is at infinity
    2. (b) For a lens the first principal focus is the position of the object whose image is formed at twice the focal length.
    3. (c) For a lens the second principal focus is the position of the real image whose object is at infinity
    4. (d) For a lens the second principal focus is the position of the object whose image is formed at twice the focal length