Because the specific heat capacity of beach sand is smaller than that of sea water, after absorbing the same heat, the temperature of sand with the same quality rises higher and faster than that of sea water, so when people play on the beach under the scorching sun, they will feel that the beach sand is very hot, but the sea water is cold.
Extended data:
Some knowledge of specific heat capacity:
1, different substances have different specific heat capacities, which is a characteristic of substances. Therefore, different substances can be (roughly) identified by their different specific heats (note that the specific heats of some substances are quite close).
2. The specific heat of the same substance generally does not change with the change of mass and shape. For example, the specific heat of a glass of water and a bucket of water is the same, that is, the specific heat capacity is extensive.
3. For the same substance, the specific calorific value is related to the state of the substance. The specific heat of the same substance in the same state is certain (ignoring the influence of temperature on specific heat), but the specific heat is different in different States. For example, the specific heat of water is different from that of ice.
4. When the temperature changes, the specific heat capacity also changes slightly, but it can generally be ignored. The specific heat value given in the specific heat capacity table is the average value of these substances at room temperature.
5. The specific heat capacity of gas is closely related to the thermal expansion of gas, which is different under the condition of constant volume and pressure, so there are two concepts of specific heat capacity at constant volume and specific heat capacity at constant pressure. But for solids and liquids, the difference between them is very small, so they are generally no longer distinguished.