Do You Know
Questions & Answers on General Knowledge.

Why do many fluorescent lamps blink before they come on?
The lamp first heats the filaments in its electrodes red hot so that they begin to emit electrons and then tries to start a discharge across the lamp. If there are not enough electrons leaving the electrodes to sustain a steady discharge, the lamp will blink briefly but will not stay on. The lamp will try again; first heating its filaments and then trying to start the discharge. The lamp may blink several times before the discharge becomes strong enough to keep the electrodes hot and sustain the discharge.
--- >>>
More Questions:
  • How much current can a power generator produce and how does that current vary as you introduce more load onto the generator?
  • Is it possible to create a magnet with more north poles than south poles?
  • How is an MP3 player related to a computer?
  • How tall can a tree grow?
  • Why is incandescent lighting better in residential construction than metal halide, high-pressure sodium, or mercury vapor lighting systems?
  • Why is the word mayday used as an aviation distress call?
  • In what sense is the Space Shuttle falling toward the earth?
  • Why is misleading evidence called a “red herring”?
  • What is the black holey stuff on the doors of microwave ovens? Is it for looks, protection, or what?
  • How does a transistor amplify an input signal in an audio amplifier?
  • What are watts and amps?
  • Why does a fluorescent bulb sometimes appear blue, especially right before it burns out?
  • How does the process of retreading a tire work?
  • Did other countries benefit from the Industrial Revolution?
  • If voltage shocks you, why does current kill you?
  • I didn't understand how a car (or wagon) starts its motion.
  • How can I build an AM radio?
  • What's energy?
  • What are team sports?
  • What is different about architecture now?
  • How do you keep the nuclear bomb stable until you're ready to use it? (For example, on the way to Hiroshima)
  • Why did native Americans population fall?
  • Why does an artificial sponge absorb more water than a natural sponge?
  • Why do we call a traitor a “turncoat”?
  • What do the astronauts wear in space?
  • Akbar
  • Marrie Curie
  • Good Luck Charms From Around The World
  • Hanuman
  • Class 9 - Work and Energy
  • Class 8 - Synthetic Fibres and Plastics

  • Chourishi Systems