Here's how it works. Imagine a pendulum fixed to a backpack frame and fixed with springs on either side. The pack's weight is attached to the pendulum, so the pendulum swings side to side as you walk. Gears then use that swinging motion to drive a generator, and the generator release...
根据文章第一段结尾Now scientists have figured out how to tap into that movement to produce electricity."(现在科学家们已经找到了利用这种运动来发电的方法,)和第二段内容“Picturea pendulum fixed to a backpack frame and stabilized with springs on either side. The pack's weight is attached to the...
Nguyen, Huong Ngoc; Hardesty, Melissa; Hong, Khuat Thu. 2011. "In full swing? How do pendulum migrant labourers in Vietnam adjust their sexual perspectives to their rural- urban lives?", in Culture, Health & Sexuality, Vol. 13, No. 10, pp. 1193-1206....
A pendulum has potential energy when it swings out to the side and hovers there before changing direction. It has kinetic energy when it speeds through the midpoint of its swing. Unless you help it along, it will slowly make shorter and shorter swings as its energy runs out....
The oscillating weight is the semicircular central weight that makes automaticwatchesautomatic. As you move your arm, the weight moves back and forth like a swing, and winds the mainspring so you don’t have to do it manually. close-up of rotor ...
When you walk with a backpack, do you know how the things inside move from side to side? Now scientists have figure d out how to tap into that movement to produce electricity.Picture a pendulum(摆锤) fixe d to a backpack frame an d stabilize d with springs on either side. The pack'...
When you walk with a backpack, do you know how the belongings inside swing from side to side? Now scientists have figure d out how to make use of that movement to generate electricity.Here's how it works. Imagine a pendulum fixe d to a backpack frame an d fixe d with springs(弹簧)...
These metronomes don't require batteries or electricity. You wind it up and the pendulum will swing to sound a steady click. You can change the tempo by sliding the metal weight up or down the pendulum. There are gradations marked behind the pendulum to help you choose the correct tempo....
Shorter strings will swing faster and longer strings slower. The trouble with a clock like this is that the pendulum will keep stopping. Air resistance and friction will soon use up its energy and bring it to a halt. That's why pendulum clocks have springs in them. Once a day or so, ...
What is the period of a pendulum with a string 2.4 m long? When was the pendulum clock invented? How does a magnetic pendulum clock work? Who invented the pendulum clock? What is the frequency of a pendulum? What is one oscillation of a simple pendulum? How to make a pendulum swing lo...