Why does the mercury not fall a rise in the clinical thermometer when taken out of the mouth?
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 happens to mercury when heated in thermometer?
The way a thermometer works is an example of heating and cooling a liquid. When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little further apart. This results in movement up the thermometer.
Can mercury in thermometer kill you?
Mercury is a neurotoxin, meaning it attacks the nervous system and brain. In extreme cases, mercury poisoning can lead to coma and death. However, the symptoms of mercury poisoning can be reversed in adults. It takes about six months to a year for the body to naturally remove mercury once the exposure stops.
Do they still put mercury in thermometers?
Is There Mercury in My Thermometer? If there is no liquid in your thermometer, for example, if it uses a metallic strip or coil to measure temperature (like most meat thermometers do), it is not a mercury thermometer.
Why mercury is used in thermometer?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
When a block with a hole in it is heated?
Because the block with a hole and the cutout together must have the same volume as the solid block, the cutout must fit into hole. Because the cutout expanded, so must the hole. That is why a hole expands when it is heated.
What happens when a thermometer is directly exposed to the sun?
When thermometer is placed in direct sunlight initially it will read the temperature of its surroundings or temperature of air surrounding the glass bulb or the sensor which could be metal also. A normal thermometer can not be used to measure temperature of sun as both are very far away from each other.
What is the direct sunlight temperature?
Direct sunlight can heat surfaces well above air temperature. On one late winter afternoon when the air was 54°F (12°C), shaded areas ranged from 40–46°F (4.0–8.0°C), while sunny spots were from 56–66°F (13–19°C).
How do I get an accurate outdoor temperature?
Answer: For the most accurate reading, use a liquid-in-glass or a digital thermometer. Place it so that it is not in direct sunlight at any time. The shade of a tree and a north-facing porch are two good places. Place the thermometer four to six feet above the ground in an area where there is sufficient airflow.
How do I check my body temperature?
Your body temperature can be measured in many places on your body. The most common ones are the mouth, the ear, the armpit, and the rectum. Temperature can also be measured on your forehead. Thermometers show body temperature in either degrees Fahrenheit (°F) or degrees Celsius (°C).