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wind resistance cannot be ignored in considering a simple pendulum. The wind resistance will be proportional to a higher power of the velocity of the pendulum. A small arc of the pendulum will lessen this effect.
You could demonstrate this effect for yourself. A piece of paper attached to the pendulum will add to the wind resistance, and you can measure the period both with and without the paper.
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The lenth of second's pendulum of the earth is about 1 m What should be the length of second's pendulum on the moon?
If the length of the second pendulum of the earth is about 1 meter, the length of the second pendulum should be between 0.3 and 0.5 meters.
Can an ideal simple pendulum realize?
no we cannot realize an ideal simple pendulum because for this the string should be weightless and inextendible.
Should demodulated output ideally depend on carrier amplitude?
In an AM system, definitely. In any other system, amplitude variations are intentionally ironed out, by hard limiting, before demodulation.
Should you spell out degree in a sentence or use the degree symbol?
You should spell out the word.
What is the motion of a pendulum in water?
The motion of a pendulum in water will be similar to what it is in air, except it will move more slowly and loose energy much more rapidly (unless something with some "power" is keeping it going). The speed of the pendulum should graph like a sine wave with the peaks and troughs denoting the endpoints of the travel of the pendulum in its arc. The slope of the curve at any point will represent the instantaneous acceleration. If the pendulum is released and no energy is put in from outside, the graph of the speed will diminish very quickly and dramatically.
