Is the mercury in thermometers pure?

Is the mercury in thermometers pure?

The original design contains mercury, but solely as a way to indicate the position of a column of alcohol whose expansion indicates the temperature; it is not a thermometer operated by the expansion of mercury; mercury-free versions are available.

Why is mercury red in a thermometer?

The silvery thread of thermometer mercury fails to perform when the temperature falls below a certain level. They simply substituted a substance that has a lower melting point than silvery, metallic mercury. And they colored this temperature measuring material red.

How long should I keep a mercury thermometer in my mouth?

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).

Do digital thermometers have mercury in them?

Thermometers that check body temperature in the ear, across the forehead, or have a digital display do not contain mercury.

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.

Is it safe to use mercury in a thermometer?

Mercury boils at 357°C, so, it can, therefore, be used to measure higher temperatures. However, it freezes at – 39 Celsius, so Mercury cannot be used below this temperature. Mercury thermometers are reasonably priced, durable and perfect.

Who was the inventor of the Mercury in glass thermometer?

Mercury-in-glass thermometer. The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714). It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb.

Which is state does Mercury exist in at room temperature?

Educators go through a rigorous application process, and every answer they submit is reviewed by our in-house editorial team. Mercury exists as a liquid at room temperature. This is one of the “cool” physical properties of mercury, as it is classified as a metal.