Do You Know
Questions & Answers on General Knowledge.
How does a smoke alarm work?
The most common type of smoke detector uses a tiny amount of a radioactive element called americium to inject electric charges into the air. In the absence of smoke, these electric charges attach themselves to individual air molecules and the resulting ions (electrically charged molecules) move rather easily through the air. However, if there is smoke present in the air, the electric charges attached themselves to the smoke particles and the resulting charged smoke particles don't move easily through the air. The smoke detector measures how easily the charged items it produces move through the air. If these items move easily, then the air is clean. However if they don't move easily, the air contains smoke and the detector signals danger.
What did the people of the Indus Valley do for a living and for recreation?
How does fog form?
If the battery separates charges even while it's off, how come it doesn't light up when it's off?
Which ocean is also known as the Southern Ocean?
Why do we call New York the “The Big Apple”?
Why is there a relationship between speed and pressure? What is that relation? Why are they inverses of each other?
Why does a lizard need to lie in the sunshine to get energy?
How was the Sun created?
Why does ice float on water?
How do photoconductors work?
Would it hurt if a plant-eating dinosaur bit you?
What is the Ring of Fire?
Did the English monarchy encourage sailors to find new territories?
Can I be friends with a turtle?
How do big cats mark their territory?
How does the carbon in an organic material affect the flow of light through it?
How does an X-ray take pictures of bones?
How do we see the wind?
How do blind people get around in the community?
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?
What do I do if witness bullying on the playground?
Why does purple bend more in a prism than, say, red?
What is an interference pattern in lasers?
Why is it that when you stand in front of a flat mirror, your image is reversed horizontally (left-right) but remains the same vertically (up-down)?
Which mammal is the smelliest?
Precaution while using WiFi
Most Beautiful Valleys In The World
Highest Paid Female Gamers
The Most Difficult Languages To Learn In The World
Benefits of Peaches
Risks and Precautions
It is the total diet or overall eating pattern that is most important in disease prevention and achieving good health. It is best to eat a diet with variety than to concentrate on individual foods as the key to good health. Avoid ones with excessively soft, or with cuts and bruises. Ripe fruits yield to gentle pressure and feature sweet aroma.