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VIew from a grave, the grave is being closed, and the camera lens eventually gets totally covered.
VIew from a grave, the grave is being closed, and the camera lens eventually gets totally covered.

A circuit with lamp, power source and beaker with water. Salt is added to the water, the water becomes conductive, and the lamp lights up.
A circuit with lamp, power source and beaker with water. Salt is added to the water, the water becomes conductive, and the lamp lights up.

Precipitation reaction where two solutions are mixed din a glass. A potassium iodide solution is added to a lead nitrate solution, a chemical reaction takes place. A yellow precipitate appears.
Precipitation reaction where two solutions are mixed din a glass. A potassium iodide solution is added to a lead nitrate solution, a chemical reaction takes place. A yellow precipitate appears.

Demonstration of capillary effect; red ink climbs up in the small gap between two microscope slide glasses.
Demonstration of capillary effect; red ink climbs up in the small gap between two microscope slide glasses.

Demonstration of a hoist featuring one method of a double pulley block. The person only has to lift 1/4 of the weight, but must haul a longer distance.
Demonstration of a hoist featuring one method of a double pulley block. The person only has to lift 1/4 of the weight, but must haul a longer distance.

Dissolving common salt in water requires energy (endothermic reaction), thus the temperature sinks a little as the salt dissolves. This video features temperatures in degrees Fahrenheit.
Dissolving common salt in water requires energy (endothermic reaction), thus the temperature sinks a little as the salt dissolves. This video features temperatures in degrees Fahrenheit.

Electromagnet lifts iron screws when the red key is pressed. The current causes the coils to make a magnetic field, but only as long as the current flows.
Electromagnet lifts iron screws when the red key is pressed. The current causes the coils to make a magnetic field, but only as long as the current flows.

Conductivity test of allotropes oc carbon. Only Graphite shows some conductivity, while diamond and charcoal are not conductive.
Conductivity test of allotropes oc carbon. Only Graphite shows some conductivity, while diamond and charcoal are not conductive.

Closeup on a crucible with partly molten suphur
Closeup on a crucible with partly molten suphur

White whippet dog fetches an orange ball in a field in urban surroundings.
White whippet dog fetches an orange ball in a field in urban surroundings.

White whippet dog fetches an orange ball in a field in urban surroundings.
White whippet dog fetches an orange ball in a field in urban surroundings.

Closeup on human hands picking a champignon and cutting it into two halves, allowing a look inside.
Closeup on human hands picking a champignon and cutting it into two halves, allowing a look inside.