Answer:
Because the specific heat of water is much more than the specific heat of sand. So it will take more energy to raise the same amount of water, with the same temperature.
Explanation:
Step 1: Data given
The temperature = 89 F = 31.6667 °C
Specific heat of water = 4.184 J/g°C
Specific heat of sand = 0.290 J/g°C
The specific heat is the amount of energy needed to raise the temperature of a substance.
Specific heat of water >>> specific heat of sand
With other words, we need a lot more energy to raise the temperature of water than we need for the same amount of sand.
Because of the low specific heat of sand, it will raise in temperature (very) quickly, compared to water.