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Select the correct answer.

The table shows the specific heat of four substances. If all four substances were exposed to sunlight for the same amount of time, which substance would heat up the slowest?

[tex]\[
\begin{tabular}{|l|c|}
\hline
Substance & Specific Heat $\left(\frac{J}{g \cdot ^{\circ}C}\right)$ \\
\hline
brick & 0.9 \\
\hline
dry soil & 1.26 \\
\hline
paper & 1.336 \\
\hline
water & 4.18 \\
\hline
\end{tabular}
\][/tex]

A. water
B. dry soil
C. paper
D. brick



Answer :

GinnyAnswer
To determine which substance would heat up the slowest when exposed to sunlight for the same amount of time, we need to compare their specific heats. The specific heat of a substance is a measure of how much energy is required to raise the temperature of a unit mass of the substance by one degree Celsius. A higher specific heat means that the substance can absorb more energy without a significant change in temperature.

Let's examine the specific heats provided for each substance:

- Brick: [tex]\( 0.9 \, \frac{J}{g \, ^\circ C} \)[/tex]
- Dry Soil: [tex]\( 1.26 \, \frac{J}{g \, ^\circ C} \)[/tex]
- Paper: [tex]\( 1.336 \, \frac{J}{g \, ^\circ C} \)[/tex]
- Water: [tex]\( 4.18 \, \frac{J}{g \, ^\circ C} \)[/tex]

By comparing these values, we identify the substance with the highest specific heat, since it will absorb more energy before increasing in temperature, thus heating up the slowest.

- Brick: [tex]\( 0.9 \)[/tex]
- Dry Soil: [tex]\( 1.26 \)[/tex]
- Paper: [tex]\( 1.336 \)[/tex]
- Water: [tex]\( 4.18 \)[/tex]

Clearly, water has the highest specific heat value of [tex]\( 4.18 \, \frac{J}{g \, ^\circ C} \)[/tex]. Hence, water will heat up the slowest when all four substances are exposed to the same conditions.

Therefore, the correct answer is:

A. Water

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