Question
Who invented the pendulum
clock?Solution
Galileo Galilei discovered the isochronism of the pendulum in 1583. This was the turning point from the age of mechanical clocks not controlled by periodic motion to the age of mechanical clocks moved by continuous oscillation in a fixed cycle. Galileo conceived of an isochronous pendulum clock in 1637, but never went on to complete it. In 1656, fourteen years after Galileo’s death, Christiaan Huygens used a pendulum for a weight-driven clock with a crown wheel escapement, thereby inventing the first pendulum clock.
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He thinks that he can get away ...
From the options given below, select the option which states the correct combination of correct sentences.
I. Each of the participants were req...
It was he who came running in the house with the news about the earthquake.
In the following questions, a sentence is divided into four parts. Choose the part of the sentence which may contain a grammatical error in it. If all ...
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