The term "pengulin" seems to be a misspelling or a playful combination of "penguin" and "pupil." Penguins are Flightless Birds known for their distinctive black and white coloring, living primarily in the Southern Hemisphere, especially in Antarctica. If "pengulin" refers to something else, please provide more context for a more accurate response.
Penguins are primarily endangered due to habitat loss, climate change, pollution, overfishing of their food sources, and predation by invasive species. These threats impact their ability to find food, breed successfully, and survive in their changing environments. Conservation efforts are crucial to protecting penguin populations from further decline.
In order to work, a pendulum requires a form of energy. In a clock weights are attached to chains. As gravity pulls on the weights, the chains move the clockwork. The pendulum swings through the arc of a cycloid measuring the ratio of length, gravity, and time. When the weight on the end of the chain reaches the bottom, it stops providing energy to the clock, and the clock stops. The weights and chains must be repositioned so they can again provide energy to the pendulum. Like all machines, the clockwork eventually wears out and must be repaired or replaced.