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Correct number of significant digits

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1. A 1000 MW nuclear power plant will produce 3.15 ×1016 J of energy in a year. What mass must be converted to energy? Show work including the formula, substitution, and answer, rounded to the correct number of significant digits and with the appropriate unit.

2. Find the energy released or absorbed when one mole of helium-4 is produced in this reaction. Show your work including any formulas use, substitutions, and record your answer to the correct number of significant digits including the appropriate unit. Also include whether the reaction released or absorbed energy.

32He + 31H → 42He + 11H + 10n

3. A natural gas based power plant is rated at 150 MW. If the input energy to this power plant is 420 MW the efficiency of the plant is ___%.
record the answer to the nearest percent.

4. A 1000 MW thermal power plant is 38.0% efficient. A team of engineers is tasked with raising the efficiency of this plant to 40.0%. By how much must they reduce the input power?

Answer rounded to the correct number of significant digits and with the correct unit.

Reference no: EM132542431

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