Daily Phenomenon

 Here are some of daily phenomenon. I wish it can help you for temperature task.

1.      Why does most residents home using a tile roof than the use of zinc?

Zinc is a good heat conductor. During the day, most of the sunlight absorbed by the zinc and converted into heat, so the temperature in the room increases. It makes the room uncomfortable so that the usage of zinc roof seldom use by the public. Because of it’s good characteristic as a conductor, zinc is very good when used as roof at mountain area.

2.      Why does the power cord look very slack when daytime?

Component in the cable is copper wire that can undergo expansion and increased length when the day is hot. Rubber cable also adjusts the length of the wire. It makes a visible cable slack. Cables will return to its original state when the temperature being normal.

3.      Why do you feel hotter at midday when using a black jacket?

Black color has a good characteristic as a heat conductor. When the day is hot, your black jacket will absorb the heat of the sunlight so we get the flow of heat from the black jacket that we use. The black color is the color that is the best heat-absorbing properties.

4.      Why when the sky was overcast, the temperature was hot?

When the sky was overcast, the sun's rays are irradiated before being trapped by clouds. Partly this is going to block out the sunlight reflected back by the earth's surface so that the area becomes very hot under the overcast.

5.      Why if a lump of ice doused with hot water will be melting?

Hot water has a higher heat than ice. The principle of Black said  "Heat of the absorbed is equal to the received". The temperature of the ice will increase until it reaches equilibrium temperature which causes the ice melting.

6.      Why when we blow air with mouth to the glass, there are water spots on glass?

When the mouth wide open, meaning a large volume of air flow, and high pressure in the body will contract with outside air. With the volume of a wide mouth (assumption) then the temperature of air that comes out too large. Besides the water was a result of breathing.

7.      Why is an empty bottle that dried then opened a small explosion will be heard?

When the bottle was dried in the sun, the air inside experiencing expansion. Expansion due to heat radiation from the sun makes the pressure in the bottle also dilated (P ~ Q). Consequently, when the bottle cap is opened, there are striking enough pressure difference between inside and outside the bottle bottles. Air flows from high pressure to low pressure. This pressure difference pushes air out spontaneously through the mouth of the bottle. Air friction with the bottle's mouth contributed to the particular frequency of vibration. This then comes out as the sound of explosion.

8.      Why do substances like water very long time to receive and release the heat?

Whether liquid or not, the time period of receive and release heat is determined by the heat of its kind. Substances that have a large heat type will require a long time in release or receive heat. This is happened to the water.

9.      Why a new copy paper in the copier feels warm?

Because, at the time of copying, the radiation beam generated when it took considerable heat as a consequence of conversion of energy (the radiation beam generated at the time of copying has a shorter wavelength resulting in substantial heat energy).

10.  Why does alcohol wich is poured into the hand  felt cold?

Because, the heat of the hands will move to the alcohol and evaporate so that the hands will lose the normal temperature and cold.

11.  Why when you suffer a fever, bathing with warm water recommended?

Because, we bathe or wipe with warm water then our skin pores will open and the temperature of the heat in the body will come out, causing the fever may go down faster.