What role does specific heat play in keeping a watermelon cool for a long time after removing it from a fridge on a hot day?

Take out of cooled bottle of water from refrigerator and keep it on a table.After some time you notice a puddle of water around it.Why?

At a prayer meeting, the disciples sing JAI-RAM JAI-RAM. The sound amplified by a loudspeaker comes back after reflection from a building at a distance of 80 m from the meeting. What maximum time interval can be kept between one JAI-RAM and the next JAI-RAM so that the echo does not disturb a listener sitting in the meeting. Speed of sound in air is 320 m s^-1 .

Indian style of cooling drinking water is to keep it in a pitcher having porous walls. Water comes to the outer surface very slowly and evaporates .Most of the energy needed for evaporation is taken from the water itself and the water is cooled down. Assume that a pitcher contains 10kg water and 0.2g of water comes out per second. Assuming no backward heat transfer from the atmosphere to the water, calculate the time in which the temperature decreases by 5^(@)C . Specific heat capacity of water = 4200J kg^(-1).^@C^(-1) and latent heat of vaporization of water = 2.27 xx 10^(6)J kg^(-1)

A hot body placed in a surrounding of temperature theta_(0) obeys Newton's law of cooling (d theta)/(dt)=-k(theta-theta_(0)) . Its temperature at t=0 is theta_(1) the specific heat capacity of the body is s and its mass is m . Find (a) the maximum heat that the body can lose and (b) the time starting from t=0 in which it will lose 90% of this maximum heat.

An aeroplane is flying parallel to the Earth's surface at a speed of 175 m/sec and at a height of 600m. The anlge elevation of the aeroplane from a point on the Earth's surface is 37^(@) at a given point. After what period of time does the angle of elevation increase to 53^(@) ? (tan 53^(@)=1.3270, tan 37^(@)=0.7536) .

Sita is a owner of confectionary. She got an order from one of her customers to prepare 150 loaves of bread for a birthday party. On her making process of bread, though there is a time constrain, she prepared the dough and kept it aside undisturbed for few hours. Later she made the required number of breads and delivered to customer on time. A day after the party, customer appreciated Sita for the soft and good quality of bread that she supplied to party. (a) Why Sita kept aside the dough undisturbed? (b) Name the living organism involved in the process. (c) What are the products of the process? (d) How this process enhances the quality of food?

At 10.00 A.M. a woman took a cup of hot instant coffe from her microwave oven and placed it on a nearby Kitchen counter to cool. At this instant the temperature of the coffee was 180^(@)F , and 10 minutes later it was 160^(@)F . Assume that constant temperature of the kitchen was 70^(@)F . The woman likes to drink coffe when its temperature is between 130^(@)F and 140^(@)F . between what time should she have drunk the coffee?