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by Gary Brown
$30.00
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Our greeting cards are 5" x 7" in size and are produced on digital offset printers using 100 lb. paper stock. Each card is coated with a UV protectant on the outside surface which produces a semi-gloss finish. The inside of each card has a matte white finish and can be customized with your own message up to 500 characters in length. Each card comes with a white envelope for mailing or gift giving.
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James Prescott Joule (1818-1889), British physicist. In 1840 he described the Joule effect, stating that the heat generated in a wire by an... more
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James Prescott Joule (1818-1889), British physicist. In 1840 he described the Joule effect, stating that the heat generated in a wire by an electrical current was proportional to the resistance and the square of the current. He made a series of measurements to show that a given quantity of work, from whatever source, always produced a particular quantity of heat. From this he deduced that energy was never destroyed, but was always conserved in a different form. He also showed that the temperature of a gas falls as it expands, even when it does no external work. The International System (SI) unit of energy is named in his honour.
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$30.00
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