Question

5. Calculate the energy in joules used by a 3,500 W appliance that is operated for...

5. Calculate the energy in joules used by a 3,500 W appliance that is operated for 30 minutes

9. Calculate the voltage (in volts) needed to supply 2 amps through a resistance of 6 ohms.

please include the formula and work so I check my work - thanks

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Answer #1

5.

The power of an appliance specifies how much energy will it use in a unit time. For example, a 100 Watts appliance consumes 100 Joules of energy every second. If an appliance of power P is operated for time t, the amount of energy it uses is

For

6.

The voltage V needed to supply current through resistance R is given by Ohm's law

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