Find the right combination
[7793] Find the right combination - The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot. - #brainteasers #mastermind - Correct Answers: 3
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Find the right combination

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Correct answers: 3
#brainteasers #mastermind
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A police officer responded to...

A police officer responded to a report of a barroom disturbance.
The "disturbance" turned out to be well over six feet tall and weighed almost 300 pounds. What's more, he boasted that he could whip the officer and the "Heavy Weight Boxing Champion of the World."
Said the policeman, "I'll bet that you're also an escape artist too, probably better than Houdini."
The giant nodded.
"If I had some chains," the officer continued, "you could show us how strong you really are. But all I've got is a set of handcuffs. Why don't you see just how quickly you can break out of them?"
Once in the cuffs, the man puffed, pulled and jerked for four minutes.
"I can't get out of these," the giant growled.
"Are you sure?" the officer asked.
The fellow tried again. "Nope," he replied. "I can't do it."
"In that case," said the officer, "you're under arrest."
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Crystal rectifier

In 1874, a paper by Ferdinand Braun (1850-1918) was published in the Annalen der Physik und Chemie describing his discovery of the electrical rectifier effect. He observed that certain crystals of metal sulphides have a larger or smaller resistance to an electric current, depending on its direction of flow. He used a galena crystal, a semiconductor material composed of lead sulfide. He found the rectifying effect especially true if at least one of the electrodes was a pointed wire. Thus, he had discovered the point-contact rectifier effect, the first semiconductor device. This effect wasn't used until over 30 years later in the form of the “cat's whisker”crystal radio detector which ultimately led to the point-contact transistor first produced in 1948.
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