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elena55 [62]
3 years ago
10

Which substance will cool down the slowest during the night, and why?

Physics
1 answer:
Studentka2010 [4]3 years ago
5 0

Cool down the Slowest

B. Seawater, because it heats up slower and gives away heat slower than sand.

Read the question wrong the first time

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(a). The power of the candy bar is,

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The time taken to play on 800 kJ energy of the candy bar is,

t=\frac{E}{P}

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\begin{gathered} t=\frac{800\times10^3}{440} \\ t=1.818\times10^3\text{ s} \\ t=1818\text{ seconds} \end{gathered}

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Thus,

\begin{gathered} t=1818\text{ seconds} \\ t=\frac{1818}{60} \\ t=30.3\text{ min} \end{gathered}

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The time taken to digest the canndy bar or to utilise its energy is large because it takes a lot of time to burn small amount of food and make it digest quickly.

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