Questions asked by John C.

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• When a scuba diver falls forward off a boat, why does he just land in the boat? help pls
  
• Do you think photography has changed the world or impacted the world?
  
• Who is the largest contributor on Socratic?
  
• Give an equation to describe the locus of points P(x,y) where the distance of P from point A(4,1) is twice the distance of P from the line y=2?
  
• Why is there a negative sign in emf= `-(Delta Phi)/ (Delta t)`?
  
• A bar magnet falling inside a vertical metal tube reaches a terminal velocity even if the tube is evacuated so that there is no air resistance. Explain?
  
• If `dy/dx=2`, why is `dx/dy=1/2`?
  
• An enclosed transformer has four wire leads coming from it. How could you determine which wires are paired with which?
  
• What is the voltage-time graph for an inductor when the switch closes?
  
• Show that the centre of any circle which passes through (-1, 1) and (1. 5) lies on the line x+2y-6=0 ?
  
• Sketch the ellipse `(x+1)^2 +4(y-3)^2-1=0`. Indicate the coordinates of the centre and the endpoints of the minor and major axes?
  
• `3x-yi=6+5i` Find the value of x and y, where x,y `in RR`?
  
• If 2-3i is a root of `z^3-7z^2+25z-39=0`, find the other two roots?
  
• Write down the period of `2cos(3x-pi/2)`?
  
• Difference between roots and factors of an equation?
  
• 2 sound waves of similar frequencies interfere and beats are heard. What are the values of the frequencies heard?
  
• Observation of sodium sulfite solid added to a little alkaline potassium permanganate?
  
• Is there a way to filter our answers according to most views/most likes?