Warning: Cannot modify header information - headers already sent by (output started at /home/content/70/7481070/html/appsrc/doyouknow.php:18) in /home/content/70/7481070/html/header.php on line 20

Warning: Cannot modify header information - headers already sent by (output started at /home/content/70/7481070/html/appsrc/doyouknow.php:18) in /home/content/70/7481070/html/header.php on line 21
Do You Know
Questions & Answers on General Knowledge.

What everyday household chemicals (cleaners, paints, detergents, etc.) contain large enough amounts of phosphor to glow under black light?
Fluorescent paints and many laundry detergents contain fluorescent chemicals-chemicals that absorb ultraviolet light and use its energy to produce visible light. Fluorescent paints are designed to do exactly that, so they certainly contain enough "phosphor" for that purpose. Detergents have fluorescent dyes or "brighteners" added because it helps to make fabrics appear whiter. Aging fabric appears yellowish because it absorbs some blue light. To replace the missing blue light, the brighteners absorb invisible ultraviolet and use its energy to emit blue light.
--- >>>
More Questions:
  • What do you feel g-forces when you ride on a roller coaster?
  • My grandmother used to have this watch she wound by shaking it. How is it possible?
  • How do plants make their food?
  • Who was Confucius?
  • What type of gods did Mesoamericans believe in?
  • I have noticed that the more I stir the milk into my coffee, the hotter it gets, even though the milk is cold. How does it work?
  • What do cats use their tongues for?
  • What is smog?
  • How do volcanoes erupt?
  • I understand now why the sky is blue, but why are sunsets red and orange?
  • How is Earth like an onion?
  • What led to the Renaissance?
  • Can we predict earthquakes?
  • What is a hurricane?
  • How is there inertia on earth? I though that inertia was just in space.
  • What is a homeless shelter?
  • What did the sailors bring home with them?
  • Why do people have different color skin?
  • Where does the wax from a burning candle go? Also, why do beeswax candles burn virtually completely, leaving no wax behind at all?
  • Why does a basketball bounce higher than a bowling ball?
  • What is a barometer?
  • Are whales vegetarian?
  • Were ancient Greeks good at art?
  • What do the words algebra, sofa, sash, and sequin have in common?
  • How do Oven Cooking Bags work? I know they are made of heat resistant nylon resin, but can you explain what that means?
  • 101 Ideas to Enjoy Your Life
  • Ajanta Caves
  • Most Popular Xmas Vacation Destinations
  • Benefits of Jackfruits
  • PPC Interview Q & A
  • Do You Know?

  • Benefits of Avocado

    Rejuvenates scalp

    If we speak particularly of the avocado benefits for hair, avocado oil helps rejuvenating and moisturizing the scalp. One can use avocado oil for hair in more than one ways as it s an exceptional treatment for revitalizing dry, damaged, lifeless hair. It deep conditions your locks and scalp and hence leave them looking lustrous and full of life. Moreover, being a rich source of proteins, amino acids and vitamins, avocado oil also helps promoting the growth of healthier tresses.

    Chourishi Systems