The question regards which animal provides us with skin, commonly referenced in leather products. Among the listed options, cow skin, or cowhide, is the most commonly used in the leather industry. Other animals such as goats, camels, and elephants also provide skin but are less predominant in everyday leather items. ;
A device with a current of 15.0 A delivers about 450 C of charge over 30 seconds. This corresponds to approximately 2.81 x 10 21 electrons flowing through it. The calculations involve using the current-time relationship and the charge of a single electron.
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