Do You Know
Questions & Answers on General Knowledge.
A bird lands on an uninsulated 10,000 volt power line. Will it become extra crispy?
No. Birds do this all the time. What protects the bird is the fact that it doesn't complete a circuit. It touches only one wire and nothing else. Although there is a substantial charge on the power line and some of that charge flows onto the bird when it lands, the charge movement is self-limiting. Once the bird has enough charge on it to have the same voltage as the power line, charge stops flowing. And even though the power line's voltage rises and falls 60 times a second (or 50 times a second in some parts of the world), the overall charge movement at 10,000 volts just isn't enough to bother the bird much. At 100,000 volts or more, the charge movement is uncomfortable enough to keep birds away, so you don't see them landing on the extremely high-voltage transmission lines that travel across vast stretches of countryside. The story wouldn't be the same if the bird made the mistake of spanning the gap from one wire to another. In that case, current could flow through the bird from one wire to the other and the bird would run the serious risk of becoming a flashbulb. Squirrels occasionally do this trick when they accidentally bridge a pair of wires. Some of the unexpected power flickers that occur in places where the power lines run overhead are caused by squirrels and occasionally birds vaporizing when they let current flow between power lines.
Does Africa have any big lakes?
How did flipping a coin become a decision-maker?
If there is an upward force on the egg when it hits the table, why doesn't it bounce upward?
Why do some glues dry faster than others?
Why does the wind make noise outside my window?
What were ancient spices used for?
Where does the exact reversal occur in an alternating current circuit (where does the energy diminish completely and then turn the opposite way)?
Why was grace originally a prayer said after a meal?
What is a storm surge?
Why do we say that someone caught in a dishonest or criminal act “got nailed”?
Which city has the most elaborate subway system?
Do howler monkeys howl?
What is a disability?
Which is the longest river?
Does everyone have the same kind of blood?
Are tears good for me?
Why does breaking a wishbone determine good luck?
When did men start shaving every morning?
What are the longest-living trees in the United States?
How many dwarf planets are there in the solar system?
Why do you think you see water on a road ahead of you when it's not really there?
How do shadows form?
Did science play a part in the Renaissance?
Which is the largest freshwater lake in the world?
What are the common characteristics of primates?
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Precaution while using WiFi
Make sure the network is legit and encrypted
Don t assume that a hot spot is real just because the name that pops up in your phone looks correct. If you re at a hotel or cafand, ask a manager to confirm the name of its networkandand that the network is encrypted (i.e., locked and password protected). While online, stay on encrypted channels by using the website prefix https(rather than http).