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Strange but true experiments in physics Sebestyén Zoltán and Sebestyén Zsolt Hungary - Pécs, 2005 Szeptember

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Miraculous air-pressure The normal air pressure is 10 5 Pa = 10 5 N/m 2 = =1000 N/dm 2. So the force of the air pressure is 10 4 N (1000 kg) on an approx. 10 dm 2 surface.

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Magnet that repels graphite Here the magnetic force has an effect in the direction of the smaller magnetic field. So the diamagnetic graphite repels the magnet.

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Magnet that repels graphite - Levitation -

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Shoe-lace physics I

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Shoe-lace physics II This shoe-lace will not undone (loosen) by itself. This shoe-lace will undone (loosen) by itself.

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Which will flow out faster? The same amount of water is in both of the plastic bottles. The hydrostatic pressure will be bigger at the deepest point of the right sided bottle. Sebestyén Zoltán and Sebestyén Zsolt Hungary - Pécs, 2005 Szeptember

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Determining the pressure in an air-balloon I Here the height of the water-level is approx. 20 - 30 cm. So according to this the pressure in the air-balloon is approx. 2 - 3 kPa.

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Determining the pressure in an air-balloon II So according to this experiment, the pressure in an air-balloon is approx. 2 - 3 kPa too. Here the dynamometer, which contact- surface is 3 cm 2, shows approx. 1 N force.

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Measuring our lung-pressure Here the average height that the people can achieve is 150 cm. It means that we can produce an approx. 15 kPa maximum pressure in our lung. Sporters can make much higher lung- pressure.

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Human being power as an electric cell The aluminium fork is the negative output and the steel knife is the positive output. With 5-6 people, the led will burn. The Human being is the electrolyte.

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Thank You for Your attention! Sebestyén Zoltán and Sebestyén Zsolt Hungary - Pécs, 2005 Szeptember sezo@tvt-pecs.sulinet.hu

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