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Ch 30: Inductance
Young & Freedman Calc - University Physics 15th Edition
Young & Freedman Calc15th EditionUniversity PhysicsISBN: 9780135159552Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoYoung & Freedman Calc 15th EditionCh 30: InductanceProblema 18a
Capitolo 30, Problema 18a

It has been proposed to use large inductors as energy storage devices. How much electrical energy is converted to light and thermal energy by a 150 W light bulb in one day?

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First, understand that power (P) is the rate at which energy is used or converted. The power of the light bulb is given as 150 watts (W), which means it uses 150 joules of energy per second.
To find the total energy used in one day, we need to calculate the total time in seconds. There are 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Therefore, the total time in seconds is 24 * 60 * 60.
The energy used by the light bulb in one day can be calculated using the formula: \( E = P \times t \), where \( E \) is the energy in joules, \( P \) is the power in watts, and \( t \) is the time in seconds.
Substitute the given values into the formula: \( E = 150 \text{ W} \times (24 \times 60 \times 60) \text{ s} \).
This calculation will give you the total electrical energy converted to light and thermal energy by the light bulb in one day.

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Electrical Power

Electrical power is the rate at which electrical energy is transferred by an electric circuit. It is measured in watts (W), where one watt is equal to one joule per second. Understanding power is crucial for calculating the energy consumption of devices, such as a light bulb, over time.
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Power

Energy Conversion

Energy conversion refers to the process of changing energy from one form to another. In the context of a light bulb, electrical energy is converted into light and thermal energy. This concept is essential for determining how much energy is used and transformed by the bulb over a given period.
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Unit Conversions

Time Calculation

Time calculation involves determining the duration over which a process occurs, which is necessary for calculating total energy consumption. For a 150-W light bulb operating continuously, the energy used in one day can be calculated by multiplying the power by the time in seconds (24 hours).
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Calculating Displacement from Velocity-Time Graphs
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