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.
What is the difference between bravery and courage?
Why are batteries different sizes (e.g., AAA, AA, C, and D) if they all have 1.5 volts?
Why do sunspots affect radio and TV reception?
What was the first animal with a spine?
Which is the worst earthquake in history?
What is net force?
Why do wolves howl?
Why is an erratic person called a “screwball”?
Can penguins walk?
What was special about the colony in Australia?
Are all metals magnetically charged?
What is organic farming?
Is air a fluid or a gas or both?
What was the Little Ice Age?
How do window tints (for your car windows) work? Are they just polarized materials?
When will Halley's Comet be seen again?
Do foxes live in groups like wolves?
What is special about the Egyptian plover?
What do A.M. and P.M. stand for?
Why after boasting do we knock on wood?
Why is it that when people jump, they don't bounce up?
What can parents do to help kids with their library assignments?
Why do Saturn's rings shine?
What do potato chips have to do with the heart?
How can you know that the pound used to weigh your apples is the same whether you are in New York City or Los Angeles?
Healthy foods that can make you Fat
Precautions while using Computer and Laptops
Essential Tips For Job Success
Favourite Christmas Movies
Makeup for Valentine's Day
101 Awful Food Facts
Sunniest Places in the World
RHODES ISLAND GREECE
The largest of the Dodecanese Islands Rhodes Island is one of Europe?s sunniest Islands with about 300 days and 3000 hours of sunshine per year.