A cell has a voltage (E) of 2.1 volts, an internal resistance (r) of 0.9 ohms, and is connected to an electromagnet with a resistance (R) of 0.3 ohm. What current, in amps, will the electromagnet receive? Carry the answer to two decimal places.
Fill in the blank(s) with the appropriate word(s).
1.75
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Which of the following is an advantage of steam turbines over electrical equipment?
A. They have minimal sparking. B. They are useful in areas where volatile substances are produced. C. They require electricity to run. D. They are suitable for dry environments.
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Tools play a small role in agriculture
Indicate whether the statement is true or false.
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In a futures market, the person who accepts the risk in exchange for an expected profit is called the hedger
Indicate whether the statement is true or false
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At least __________ of free blacks lived in southern cities
A) three-quarters B) one-half C) one-third D) one-quarter
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