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Physics, 21.06.2019 20:00
Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.
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Physics, 22.06.2019 16:00
The amount of potential energy possessed by an elevated object is equal to what?
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Physics, 22.06.2019 20:00
What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
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A cell is connected in series with a resistor and supplies a current of 4.0 A for a time of 500 s. D...
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