5.imagine you are at the beach on a very hot day. you walk toward the water. the sand is eextremly hot. when you reach the water, you find that the water is much cooler than sand.
a) using the term heat capacity, explain why the sand is hot and water is cool
b)predict what the air temprature would be relative to the sand and water temp..
explain your thinking using the term heat capacity.
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Heat is stored in masses. How much heat depends on the temperature change, and the heat capacity. Things like water have very high heat capacity, so that if solar energy impinges, the temperature of the water does not change much. On the other hand, sand, and air, do not have high heat capacity, so their temperature fluctuates greatly if energy impinges on them.
i ddn't get for "b"
can you tell me a site
a) Heat capacity is the amount of heat energy required to raise the temperature of a substance by a certain amount. In this case, the sand has a lower heat capacity than water, which is why it heats up more quickly when exposed to the sun. Sand has a lower heat capacity because it is made up of small solid particles that are densely packed, which means there is less space for the heat energy to be dispersed. As a result, the sand absorbs and retains heat more readily, making it hot to the touch.
On the other hand, water has a higher heat capacity due to its molecular structure. Water molecules form hydrogen bonds with each other, creating a network that requires more energy to break. As a result, it takes longer for water to heat up compared to sand. The heat energy from the sun is absorbed by the water and distributed among a larger number of molecules, which leads to less temperature change. Therefore, the water at the beach remains cool in comparison to the hot sand.
b) Based on the concept of heat capacity, we can predict that the air temperature would be cooler relative to the sand temperature, but warmer relative to the water temperature.
Since sand has a lower heat capacity, it heats up quickly under the sun. As a result, the air in contact with the heated sand also becomes hotter. Therefore, the air temperature near the sand would likely be warmer than the water temperature.
In contrast, water has a higher heat capacity, as explained earlier. This means that it requires more energy to change its temperature compared to the sand. As a result, the water at the beach retains its coolness for a longer period of time. The air in contact with the cooler water would absorb less heat from it, resulting in a relatively lower temperature compared to the air near the sand.
In summary, the air temperature would be cooler relative to the sand temperature but warmer relative to the water temperature due to the difference in heat capacities of sand and water.