What is the power usage of the player
Question: A portable CD player operates with a current of 27mA at a potential difference of 4.2 V. What is the power usage of the player?
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A current of 0.83 A flows through a copper wire 0.50 mm in diameter when it is connected to a potential difference of 15 V. What is the length of the wire?
Alameda Service Center just purchased an automobile hoist for $14,160. The hoist has a 6-year life and an estimated salvage value of $1,125. Installation costs were $3,010, and freight charges were $800. Alameda uses straight-line depreciation.
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A portable CD player operates with a current of 27mA at a potential difference of 4.2 V. What is the power usage of the player?
Pablo Management has six part-time employees, each of whom earns $220 per day. They are normally paid on Fridays for work completed Monday through Friday of the same week.
An 82 ohms resistor has a current of 0.73 A and is connected in series with a 140 ohms resistor. What is the emf of the battery to which the resistors are connected?
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The rate constant for this reaction is 2.3 x 10-3 M-1 days-1 at a given temperature. Suppose you started with 2 M of HCN(aq), what would be the molar concentration of HCN(aq) at 20 days?
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