GENERAL KNOWLEDGE

Detailed explanation-1: -Answer and Explanation: Hot sand cools off faster at night than vegetation because the sand’s specific heat capacity is less than the specific heat of vegetation. Specific heat can be defined as the measure of the amount of heat required to raise the temperature by 1-degree celcius per unit of mass.

Detailed explanation-2: -Sand has a low specific heat, as evidenced by its relatively large temperature changes (for small changes in internal energy), i.e. a small thermal inertia.

Detailed explanation-3: -Sand heated up faster than water because sand is darker than water; dark colored materials will absorb more light.

Detailed explanation-4: -Since, specific heat capacity of water is more than that of sand, it takes more time to become hot. For sand, the specific heat capacity is very less, so it heats up quickly during the day.

Detailed explanation-5: -The amount of heat given by the sun to sea water and beach sand is the same on a hot sunny day. However, the sand heats up faster than the water. This demonstrates that the amount of heat required to heat the sand is less. As a result, the specific heat of sand is lower than that of water.