Question

Give reasons for the following:
a. Plastic handles are used in frying pans.
b.
C.
d Ventilations are installed at the upper part of the room.
Room heaters are installed near the floor of the room.
Explain the structure of a thermos flask with a figure.
A kink is made near the bulb of a clinical thermometer
A digital thermometer is better than mercury thermometer​

Answer 1

Answer:

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Answer 2

Answer:

A)The handles of frying pans are made of plastic or insulating materials because plastic and insulating materials doesn't allow the heat to flow from pans to handles so that it will be easy to hold the frying pans.

D)Ventilators are provided in the rooms at the top of the roofs because if the air inside the room gets hot, the hot air rises up and flows through these ventilators and thus cool air remains at bottom. It brings cool and fresh air in the room.

E)As you know hot air Rises up and cold air settles down so room heater is placed near to the floor so that the heat can move uniformly from down to up. similarly, the air conditioner is placed near silly so that it can cool both the upside of the room and the cold air can go downside so that there is uniform cooling

F)Structure of thermos flask

The vacuum flask consists of two vessels, one placed within the other and joined at the neck. The gap between the two vessels is partially evacuated of air, creating a partial-vacuum which reduces heat conduction or convection.

G)In a clinical thermometer kink plays an important role. kink prevents the mercury present in the capillary to fall back in the bulb. So it separates the mercury at high temperature and cool mercury and allows the user to note the reading when the thermometer is taken out.

H)Digital thermometers provide fast results as opposed to mercury thermometers whose readings are slower to realize because you have to wait for the mercury to heat and then slowly rise to display the temperature. ... Mercury thermometers are also designed to withstand boiling temperatures.

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