Why do we use mercury in thermometer?

Why do we use mercury 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.

What is the normal body temperature in mercury thermometer?

about 98.6 degrees Fahrenheit
What is a normal body temperature? Normal body temperature is about 98.6 degrees Fahrenheit (°F) or 37 degrees Celsius (°C). Normal temperature often varies from 1° to 2°F (½° to 1°C). A normal temperature is usually lower in the morning and increases during the day.

What is the difference between a mercury thermometer and a digital thermometer?

Mercury thermometers readings are slower to realize because we have to wait for the mercury to heat and then slowly rise to display the temperature whereas digital thermometers are designed using advanced technology that enables them to provide instant results on the spot, which means no more waiting for crawling hot …

How long should you keep a mercury thermometer in your mouth?

After shaking the mercury down, place the thermometer under the child’s tongue, with the bulb toward the back of the mouth. Tell your child to keep the lips firmly closed, but not to bite the thermometer. 3. Leave the thermometer in place for 3 minutes.

Are mercury thermometers more accurate?

But mercury thermometers also have real advantages over the alternatives. They’re often cheaper and more accurate, especially at higher temperatures. And unlike one common alternative, electronic thermometers, they’re self-contained (no wires sticking out) and require no power.

How does a mercury thermometer measure body temperature?

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.

How do you get Mercury out of a thermometer?

Once clean we are ready to measure the temperature. Start by taking the thermometer from the opposite side of the bulb and shake it vigorously. This will help lower any residual mercury that may remain in the thermometer, thus ensuring that the indicated temperature is reliable.

Is the mercury thermometer still used in homes?

The mercury thermometer is a classic design for temperature measurement still used by many families. Although currently there are digital thermometers this form of temperature measurement is still very much in demand, in addition to being very simple to use.

How long does it take for mercury thermometer to rise?

Once you have decided on which area you will use the thermometer place it there and wait three minutes, time necessary for the mercury to rise and indicate the temperature. We recommend keeping time to avoid removing the thermometer before it is due.

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