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Barometer A device for measuring pressure. Battery Electrochemical cells that transform chemical energy into electricity. Base In chemistry, bases are substances that, in aqueous solution, release hydroxide (OH −) ions, are slippery to the touch, can taste bitter if an alkali, [50] change the color of indicators (e.g., turn red litmus paper blue), react with acids to form salts, promote ...
The stability provided by the coating solved problems inherent to early power supply designs, as they used vacuum tubes. Because the funnel is used as a capacitor, the glass used in the funnel must be an excellent electrical insulator . The inner coating has a positive voltage (the anode voltage that can be several kV) while the outer coating ...
Gaines said he intended to supply Fort Scott from New Orleans via the Apalachicola River. As this would mean passing through Spanish territory and past the Negro Fort, it would allow the U.S. Army to keep an eye on the Seminole and the Negro Fort. If the fort fired on the supply boats, the Americans would have an excuse to destroy it. [73]
However, a side-effect of the push by some industrial nations to "go green" and utilize biofuels was a decrease in the supply of food and a subsequent increase in the price of the same. It partially caused the 2007 food price crisis , which seriously affected the world's poorer nations with an even more severe shortage of food.