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15 de may. de 2019 · Considering the investigated parameters and their ranges, optimum conditions for rapid sample preparation with a view to achieving multi-element ICP-OES or FAAS determinations in samples derived from soybeans can be summarized as follows: for nominal sample masses of ∼1.0 g, addition of 8.0 mL 65% HNO 3 (w/w) with a short 5 min heating period using IR radiation are sufficient.
The current in the heating element when connected to 120 V would be approximately 5.42 A. Explanation: The student is asking about the current flowing through a heating element when the voltage supplied is halved. The heating element of a stove designed to dissipate 2,600 W at 240 V would have a resistance (R) calculated using the formula .
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Question: A heating element in a stove is designed to dissipate 2,600 W when connected to 240 V. (a) Assuming the resistance is constant, calculate the current in the heating element if it is connected to 120 V. (b) Calculate the power it dissipates at that voltage. There are 2 steps to solve this one.
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Tel.: +1 (877) 502 5500 - Fax: +1 (619) 210 1590 -E-mail: sales@crydom.com www.crydom.com For reference, the power in watts developed in a single phase resistive heating element is the product of the voltage applied to the element and the resulting current through it: P = V L x I L (3)
