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Typically, an electrical appliance uses electrical energy at a certain rate (a certain power, a certain amount of energy per second). The longer you keep it on, the more energy it will use in total. The relation is simply:

energy = power x time

Units might be joule, watt, and seconds; or kWh, kW, and seconds.

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Why does a longer fetch result in bigger waves?

A longer fetch allows the wind to travel over a greater distance, picking up more energy and transferring it to the water. This energy is then transformed into wave energy, resulting in larger waves. The longer the fetch, the more time and distance the wind has to generate waves.


A way to determine the amount of power being used is to?

use a power meter or energy monitor that can track the electricity consumption of individual appliances or the entire household. This device can provide real-time data on power usage, helping you identify energy-hungry appliances and make adjustments to reduce consumption.


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Assuming a constant power:(energy consumption) = power x time In SI units: joules = watt x seconds Of course, if the power is not constant, you need to replace the formula by an integral.


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If the energy supplied is extended five minutes longer, the line graph would likely show a further increase in the energy supplied over time, indicating a positive trend or upward slope. This extension would result in more energy being delivered or consumed during that additional time period.


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Yes, a cannonball will generally travel farther if shot from a longer cannon. A longer cannon gives the cannonball more time to accelerate and build momentum before exiting the barrel, resulting in a higher initial velocity and longer travel distance.

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