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Test # 256 [14-Mar-2018]


1.
Oddly enough ...... the prestige of USA in countries like Britain, France and Italy is considered important here, Congress has been ...... about supplying funds to the US Information Agency in these countries.

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  • Science Experiments Ideas

    Hot air balloon

    Roll a paper napkin into a tube and twist up the top. Stand it upright and light the tip. While the lower part is still burning, the ash formed rises into the air. Take care! The air enclosed by the paper is heated by the flame and expands. The light balloon like ash residue experiences surprising buoyancy because the hot air can escape, and the air remaining in the balloon becomes correspondingly lighter. Very fine napkins are not suitable for the experiment because the ash formed is not firm enough.


    Chourishi Systems