Find the length of red arc AB
[2605] Find the length of red arc AB - Find the length of red arc AB (r1=1, r2=2). Express result to the accuracy of 3 decimal. - #brainteasers #math - Correct Answers: 43 - The first user who solved this task is Roxana zavari
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Find the length of red arc AB

Find the length of red arc AB (r1=1, r2=2). Express result to the accuracy of 3 decimal.
Correct answers: 43
The first user who solved this task is Roxana zavari.
#brainteasers #math
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Three Doors

An airline captain was breaking in a new stewardess. The route they were flying had a layover in another city. Upon their arrival, the captain showed the stewardess the best place for airline personnel to eat, shop and stay overnight.
The next morning, as the pilot was preparing the crew for the day's route, he noticed the new stewardess was missing. He knew which room she was in at the hotel and called her up wondering what happened. She answered the phone, crying, and said she couldn't get out of her room. "
You can't get out of your room?" the captain asked, "Why not?"
The stewardess replied: "There are only three doors in here," she sobbed, "one is the bathroom, one is the closet, and one has a sign on it that says 'Do Not Disturb'!"    

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Otto von Guericke

Born 20 Nov 1602; died 11 May 1686 at age 83.German physicist who investigated the properties of a vacuum invented (1654) the first piston air pump to produce a vacuum. While mayor of Madgeburg, in 1663, he demonstrated that two 51 cm diameter copper hemispheres with air pumped out of their interior would be so strongly held together by the force of air pressure that teams of horses harnessed to each hemisphere were not able to pull the hemispheres apart. He studied the role of air in combustion and respiration. With his invention of the first electrostatic machine - a rotating ball of sulphur electrified by friction against his hand - he produced sizeable sparks and showed that like charges repel each other.«
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