Alessandro Volta's theory of contact tension considered that the emf, which drives the electric current through a circuit containing a voltaic cell, occurs at the contact between the two metals. Volta did not consider the electrolyte, which was typically brine in his experiments, to be significant.
9) Ponte Colossus, Italy â 500 ft (152 m) You will find this 350 m long bridge awe-inspiring and an inspiring spot for an energetic sport like bungee jumping. It will take you an average of almost 4.5 seconds for the first fall. You need a lot of nerve power to sustain the 100 km/hr vertical velocity of the free fall.
If humans had the jumping power of a flea, a 1.8-m (6-ft) person could make a jump 90 m (295 ft) long and 49 m (160 ft) high. Researchers with the University of Cambridge in England found that fleas take off from their tibiae and tarsi (the insect equivalent of feet) and not their trochantera, or knees.enerally speaking, an adult flea only lives for 2 or 3 months. Without a host for food a flea's life might be as short as a few days. With ample food supply, the adult flea will often live up to 100 days.