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A mercury thermometer is designed so that most of the volume of mercury in it is contained in a bulb, and only a small fraction of the total available volume is in the stem on which the scale is located. Rising temperatures cause the volume of the mercury to expand, and, since in a properly designed thermometer the bulb is always full, the expansion in volume shows as a rise of the location of the top of the total volume of mercury into more of the volume of the stem. (The unfilled part of the volume of the stem is evacuated to prevent development of an opposing pressure from any gas that might otherwise be present.) Falling temperatures have the opposite effect.
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How is the pH scale different from other scales of measurement like the Fahrenheit temperature scale?
pH is a logarithmic scale, so a change of 1 in pH means a change of 10 in the quantity. It is also negative, so as pH increases the measured quantity actuallly goes down. The temperature scales are simply direct scales; all changes mean the same thing and going up means going up.
What is the opposite of Celsius?
It is an international metric temperature scale on which water freezes at 0° and boils at 100° under normal atmospheric conditions. The term "Celsius" is usually preferred to "centigrade," especially in technical contexts. Until 1948 the scale was known as centigrade when it was renamed in honour of Celsius, though in general usage (for example television weather forecasts) it was still called centigrade until quite recently. Celsius refers to Anders Celsius, the Swedish Astronomer who developed the temperature scale with 100 degrees at the freezing point of pure water (actually its triple point) at normal pressure and 0 degrees at its boiling point. On his death in 1744 Linneaus reversed the scale.
Why do I feel so hot at night and what can I do to cool down?
Feeling hot at night can be due to various reasons such as room temperature, bedding, or hormonal changes. To cool down, try lowering the room temperature, using breathable bedding, staying hydrated, and avoiding heavy meals before bed.
What is the word equation for solid mercury two oxide breads down when heated forming the elements mercury and oxygen?
The word equation for the breakdown of solid mercury(II) oxide when heated is: Mercury(II) oxide --> Mercury + Oxygen.
Why is my body hot at night and what can I do to cool down?
Your body may feel hot at night due to a variety of reasons, such as room temperature, bedding material, or hormonal changes. To cool down, you can try adjusting the room temperature, using lighter bedding, staying hydrated, and practicing relaxation techniques before bed.
Why does the mercury moves up and down the scale as the temperature changes?
Mercury expands and contracts with temperature changes due to its thermal expansion properties. When the temperature rises, the mercury expands, causing it to move up the scale. Conversely, when the temperature drops, the mercury contracts, causing it to move down the scale.
How does a thermometer work to measure temperature accurately?
A thermometer works by using a substance, such as mercury or alcohol, that expands or contracts based on temperature changes. This substance moves up or down a calibrated scale to indicate the temperature. The accuracy of the measurement is determined by the precision of the scale and the sensitivity of the substance to temperature changes.
How does a thermoter work?
A thermometer works by measuring temperature using a temperature-sensitive material like mercury or alcohol. As the temperature changes, the material expands or contracts, causing it to move up or down a calibrated scale. This movement indicates the temperature in degrees Celsius or Fahrenheit.
What is the purpose of using a bulb thermometer?
A bulb thermometer is used to measure temperature by relying on the expansion and contraction of a liquid (typically mercury or colored alcohol) inside a glass tube. When the temperature changes, the liquid expands or contracts, moving up or down the tube and indicating the temperature on a scale.
How do liquid thermometers work to measure temperature accurately?
Liquid thermometers work by using a liquid that expands or contracts with changes in temperature. The liquid is contained in a sealed tube with a scale marked on it. As the temperature changes, the liquid expands or contracts, causing it to move up or down the tube, indicating the temperature on the scale. This allows for accurate measurement of temperature changes.
What is the working principle of the mercury thermometer?
Mercury thermometers work on the principle that mercury expands when heated and contracts when cooled. The scale on the thermometer is calibrated based on this expansion and contraction, allowing it to measure temperature accurately. When the temperature rises, the mercury expands and rises up the tube, and when the temperature falls, the mercury contracts and moves back down the tube.
Ho does a thermometer measure temperature?
A thermometer measures temperature by using a substance that expands or contracts with temperature changes, such as mercury or alcohol. As the substance heats up or cools down, it moves along a scale marked on the thermometer, providing a reading of the temperature.
What is the role of the bulb on a labatory thermometer?
The bulb of a laboratory thermometer contains a liquid (like mercury or alcohol) that expands and contracts with temperature changes. This expansion and contraction moves the liquid up and down the calibrated scale, allowing the thermometer to measure the temperature of a substance or environment accurately.
What is the diffrerence between digital thermometer and mercury thermometer?
A digital thermometer uses electronic sensors to measure temperature and displays the reading digitally, while a mercury thermometer uses a column of mercury to measure temperature and has a calibrated scale to indicate the temperature. Digital thermometers are often faster and more accurate than mercury thermometers, and are also safer since they do not contain mercury.
What are the parts of a thermometer and their functions?
A typical thermometer consists of three main parts: the temperature sensor, the scale, and the casing. The temperature sensor, often a bulb filled with a liquid such as mercury or alcohol, expands or contracts with temperature changes. The scale provides a numerical readout of the temperature sensed by the sensor. The casing protects the internal components and provides a handle for easy handling.
How does a thermomether works?
A mercury thermometer (like the kind a medic might use) is a thin glass tube filled with the metallic element mercury, which is a liquid. The rate at which mercury expands with heat is known and happens at a constant rate, so the movement of the mercury column up and down the tube can be read off at a scale on the side. Because mercury is relatively dense, it isn't affected too much by changes in atmospheric pressure.
Why doesn't mercury fall in thermometers?
Mercury doesn't fall in thermometers because it is sealed within a capillary tube along with a small amount of air. As the temperature changes, the mercury expands or contracts, moving up or down the tube to indicate the temperature. This design keeps the mercury contained and allows it to accurately measure temperature.
