Gravitational force acts on a particle due to fixed uniform solid sphere. Neglect other forces. Then particle : 

(A) experiences a force directed along the radial direction only. 

(B) always moves normal to the radial direction 

(C) always moves in the radial direction only. 

(D) always moves in circular orbit.

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  void foo(int x, int y)
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  x+=y;
  y+=x;
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  }
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  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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• What is the number of steps required to derive the string ((() ()) ())

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