Lightning on the table. Drawing, description

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Lightning on the table. Children's Science Lab

Children's Science Lab

Directory / Children's Science Lab

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For experience you need:

metal baking sheet;
plasticine;
plastic bag;
metal fork.

Lightning on the table

1. Press a large piece of plasticine against the baking sheet so that you get a handle. Now don't touch the pan itself - just the handle.

2. Holding the baking sheet by the plasticine handle, three of it in a circular motion on the package. In this case, a static electric charge accumulates on the baking sheet. The baking sheet should not extend beyond the edges of the package.

3. Raise the baking sheet slightly above the bag (still holding the plasticine handle) and bring the prongs of a fork to one corner. A spark will jump from the pan to the fork. This is how lightning jumps from a cloud to a lightning rod.

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Wheel instead of gateway 12.12.2002

Two navigable channels passing through Scotland are separated by a difference in water level of 33 meters. In order to allow ships to move from one channel to another, it was decided instead of locks, which take up a lot of space and require a long locking process, to build a kind of rotating elevator.

For four years, two huge wheels with a diameter of 35 meters were erected between the canals, on each of which two "baths" for ships were fixed. Each "bath" holds 300 cubic meters of water and a ship with a carrying capacity of up to 600 tons. Turning the wheel takes less than 5 minutes - and the two channels exchanged ships. Loading and unloading "cradles" lasts approximately 15 minutes.

Previously, a system of 11 locks operated here. Now the journey from Glasgow to Edinburgh has been shortened by a few hours.

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