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Q: The function of the pendulum clock of a very old model was completely ……….
  • A. Mechanical
  • B. Mechanical and Electrical
  • C. electrically
  • D. battery operated
Correct Answer: Option A - The function of the pendulum clock of a very old model was completely mechanical. It was invented by Christian Hygens in 1656 AD.
A. The function of the pendulum clock of a very old model was completely mechanical. It was invented by Christian Hygens in 1656 AD.

Explanations:

The function of the pendulum clock of a very old model was completely mechanical. It was invented by Christian Hygens in 1656 AD.