Do You Know
Questions & Answers on General Knowledge.
How does one prove that the earth is round?
There are many possibilities, so I'll suggest an intriguing method that is familiar to surveyors. While the overly simple technique I suggest isn't particularly practical, it is closely related to surveying techniques that are practical. Take a very long string, say about 20 miles long, and attach one end of the string to a post. Now draw the string taut and walk all the way around the post while holding on to the other end of the string. If you measure the distance you walked while completing one full trip around the post, you would expect it to be related to the length of the string by a factor of 2 times pi because you learn in grade school that the circumference of a circle is 2 times pi times the radius of that circle. However, that relationship is only true if you're working on a flat surface. Since the earth is curved, the circumference of the circle around which you walk will be somewhat less than 2 times pi times the radius of the circle. That result is enough to prove that you're on a curved surface. You can see this effect by performing the experiment I just suggested on the surface of a basketball. Take a short length of string and use it, together with a pin and a pencil, to draw a circle on the surface of the ball. If you measure the circumference of that circle and compare it to 2 times pi times the length of the string, the circle's circumference will be a bit shorter than expected. As with the earth, the basketball is a curved surface. The larger the circle you try to draw in this manner, the greater the discrepancy between 2 times pi times the radius and the actual circumference of the circle.
How do elevators work?
Do microwaves have no effect on gas?
When will Halley's Comet be seen again?
Where do comets come from?
On a three-way lamp, what are the switch settings for? Does it pump in more energy?
How do I graph (line or pie) the time it takes different amounts of water to freeze?
How are mountains different from plateaus?
Can the light from a fluorescent lamp be collimated into a beam of parallel rays?
How does a standard water pump work?
Is the rattlesnake poisonous?
How far does a seabird migrate?
How did the first reptiles evolve on Earth?
How did the Mughals keep the Empire together?
How do boats float?
What does the word dinosaur mean?
Why does a groom carry his bride over the threshold?
What is the "sound barrier"?
How long does a turtle live?
What is an electric field and how does it affect us?
What do the distress letters SOS stand for?
How does electric current create magnetic poles in metal? When the current goes through the metal, what makes it positive and negative?
Were the Mesopotamians really the first people to develop writing?
Is that a crocodile or an alligator?
How are glacial valleys formed?
How do insects grow?
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Anjuna Beach Party Goa
The gorgeous Indian state of Goa perhaps best celebrates New Years Eve on the beautiful Anjuna Beach. With a cocktail in hand, get ready to see the sun go down and indulge in some revelry with the best of them as India gets ready to say goodbye to 2014 and welcome in a prosperous and pleasant 2015 for one and all. With plenty of hotels and resorts near the seafront, you can be assured of a fabulous party on the beach.