Can pendulums find things?

Find What You're Looking For... Using a Pendulu. (Now, it doesn't have to be a crystal pendulum...it can be any pendulous object at all in fact). Pendulums & other dowsing objects, like dowsing rods (L rods or Y rods), have been used throughout history to locate objects or resources.

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What is the science behind dowsing?

The scientific explanation for what happens when people dowse is that "ideomotor movements" ? muscle movements caused by subconscious mental activity ? make anything held in the hands move. It looks and feels as if the movements are involuntary. Does divining for water work? There is no evidence that divining, which relies on the spontaneous twitching of sticks held in human hands, can accurately detect anything beneath the ground.

Thereof, how heavy should a pendulum be?

Pendulum bobs in quality clocks are usually made as heavy as the clock's movement can drive. A common weight for the bob of a one second pendulum, widely used in grandfather clocks and many others, is around 2 kilograms. Why mass does not affect pendulum? The reason the simple pendulum has no dependence on mass is because the mass gets to "count" for two different things. (The same thing happens in freefall motion, where all things of all weights fall at the same rate.) For a mass-spring system, the mass still affects the inertia, but it does not cause the force.

And another question, would a pendulum go forever in a vacuum?

If you manage to eliminate all these effects then yes, the pendulum will oscillate forever. Where does the energy go when a pendulum stops? This changes some of the swing's kinetic energy into thermal energy, which is transferred to the environment. With less kinetic energy, the swing slows down. When all of its mechanical energy has been converted to thermal energy, the swing stops. It no longer has potential energy or kinetic energy.