Why we should not hold the thermometer by the bulb?

It is advised not to hold the thermometer by its bulb while reading it because if we hold a thermometer by its bulb, the mercury in the bulb will expand due to our body temperature and effect the actual reading.

What will happen if you touch the bulb of the thermometer?

If you break a mercury thermometer or light bulb, a small amount of liquid mercury may spill out. Liquid mercury can separate into small beads, which can roll some distance away. The mercury may also evaporate into vapour. However, this small amount of mercury is extremely unlikely to cause problems for your health.

Is advised not to hold the thermometer by its bulb while reading it because *?

If we hold the thermometer by its bulb while reading it, mercury will get expanded by our body temperature.

How do you hold a thermometer?

Place the thermometer tip under the tongue. Hold the thermometer in the same spot for about 40 seconds. Readings will continue to increase and the F (or C) symbol will flash during measurement. Usually, the thermometer will make a beeping noise when the final reading is done (usually about 30 seconds).

Why does the mercury not fall or rise in a clinical thermometer?

The mercury does not fall or rise in a clinical thermometer when taken out of the mouth because of the presence of kink. It prevents mercury level from falling on its own.

What is the normal temperature of a healthy person?

98.6°F
Normal body temperature varies by person, age, activity, and time of day. The average normal body temperature is generally accepted as 98.6°F (37°C). Some studies have shown that the “normal” body temperature can have a wide range, from 97°F (36.1°C) to 99°F (37.2°C).

Which thermometer records the highest and lowest temperature during a period of time?

Six’s thermometer is a registering thermometer which can record the maximum and minimum temperatures reached over a period of time, for example 24 hours. It is used to record the extremes of temperature at a location, for instance in meteorology and horticulture.

What is a normal forehead temperature?

The average body temperature is 98.6 F (37 C). But normal body temperature can range between 97 F (36.1 C) and 99 F (37.2 C) or more.

What precautions should you follow while using a laboratory thermometer?

The precautions needed while reading a laboratory thermometer are:

  • It should be kept upright not tilted.
  • Bulb should be surrounded from all sides by the substance of which the temperature is to be measured.
  • The bulb should not touch the surface of the container.

What should be the level of mercury in the clinical thermometer before use?

Precautions in Using a Clinical Thermometer (2) Before using the clinical thermometer, we should ensure that the mercury level in its tube is below 35°C mark.

Is 99.7 a fever?

Fever. In most adults, an oral or axillary temperature above 37.6°C (99.7°F) or a rectal or ear temperature above 38.1°C (100.6°F) is considered a fever. A child has a fever when his or her rectal temperature is higher than 38°C (100.4°F) or armpit (axillary) temperature is higher than 37.5°C (99.5°F).

What happens when you hold the thermometer by the bulb?

The bulb of thermometer is the sensing point of thermometer. When we have to measure temperature, bulb is touched with the surface. Bulb contains mercury or alcohol in it. Holding thermometer by bulb will cause mercury or alcohol to expand or contract, due to body temperature.

Why does the thermometer not touch the ground?

1.) The thermometer should be kept upright not tilted. 2.) The bulb of the thermometer should be surrounded from all sides by the substance of which the temperature is to be measured. 3.) The bulb should no touch the surface of the container. In growing rock candy does the string need to touch the ground all the way?

How does a thermometer measure the temperature of a liquid?

Thermometer. A thermometer suspended away from the stirring bar. Suspend the reservoir (the tip) of the thermometer below the surface of the solution, but do not allow the tip to touch the walls or bottom of the container. If the thermometer bulb touches the container, the temperature of the glass will be measured instead of the temperature…

Can a thermometer be suspended in a hot solution?

Stirring can be done manually or mechanically. Be careful with hot solutions. If mechanical stirring is used, make certain that the stirring bar will not touch the thermometer by suspending the thermometer well out of the way. There are several techniques available to suspend a thermometer in a solution: