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Why is the entire mercury bulb of the thermometer must be below the level of the side arm in order to obtain an accurate reading of the distillation?
The boiling point of the distillate is normally the temperature of the vapour. If the bulb of the thermometer is placed too high, above the sidearm leading to the condeser, the entire bulb will not be heated up by the vapour of the distillate, and the temperature will be too low. however, if the bulb of the thermometer is placed too low, too near to the surface of the boiling water, the thermometer will show a too-high reading.Thus, the bulb of the thermometer should be placed at the sidearm or just below the sidearm in order to obtain an accurate reading of the distillation. Source: http://books.Google.com.sg/books?id=qHoWToUx1uYC&pg=PA86&lpg=PA86&dq=why+is+the+bulb+of+the+thermometer+placed+at+the+sidearm&source=bl&ots=JBLp_O9h3d&sig=cY86Ubsrci1WpGedNfoU9x8GovE&hl=en&ei=1yRPSoO1JISIsgP02K2XBw&sa=X&oi=book_result&ct=result&resnum=1
Why must the bulb of the thermometer be submerged in the water?
The bulb of the thermometer must be submerged in the water because that is where the temperature of the water is accurately measured. The bulb is the part of the thermometer that contains the temperature-sensitive material, such as mercury or alcohol, which expands or contracts depending on the temperature of the water. This expansion or contraction is then displayed on the thermometer scale, giving an accurate reading of the water temperature.
Why must the sling psychrometer be swung to obtain the wet bulb reading?
It is swung through the air to speed up evaporation of water from the wet bulb thermometer.
In getting the temperature of tap water why must the bulb of the thermometer be submerged in the water?
Because you need to measure the temperature of water, not the air.
Why must the bulb of thermometer be submerged in the water in getting the temperature of tap water?
Because you need to measure the temperature of water, not the air.
Why must sling psychrometer be swung in order to obtain the wet bulb reading?
It is cooling by evaporation
Parts of a liquid-in-glass thermometer?
AnswerThere are a number of different types of thermometers, but all have two basic elements. First, they must have a temperature sensor (mercury, dissimilar metals, etc.) capable of detecting a change of temperature. Second, they must have a means (such as a scale) of measuring the degree of change.AnswerAlso there's a bulb isn't there? So there are: bulb, scale, colored alcohol (or w.e).
What do you need to make a wet bulb theremometer?
A wet bulb thermometer, simply has the sensitive bulb, dampened with water.A small muslin bag with wick attached, is placed over the bulb. The wick is placed in a small container of water, which must be periodically topped up.The water around the bulb evaporates, giving a cooling effect. As the water evaporates, more is drawn via the wick from the reservoir.The amount of evaporation, will depend on the water saturation already in the atmosphere. By comparing the temperature with a normal thermometer and reading the results in a table, the dew point can be found.
Why does the clinical thermometer have a constriction?
Quote: When the temperature falls, the column of mercury breaks at the constriction and cannot return to the bulb, thus remaining stationary in the tube. After reading the value, the thermometer must be reset by repeatedly swinging it sharply to shake the mercury back through the constriction. Unquote.
Why must a light bulb be connected to both ends of a battery to light up?
For current to flow through the lamp, there must be a potential difference (voltage) applied across opposite ends of that lamp.
Why must a laboratory thermometer be left in place to take a reading?
A laboratory thermometer must be left in place to take a reading because the thermometer needs time to adjust and reach thermal equilibrium with the substance being measured. Moving the thermometer too soon can result in an inaccurate reading.
How do you change the back headlight?
To change one's back headlight, one must first uncover the light bulb. Then one must unscrew the bulb. One must have another bulb to change the headlight. Screw in the new bulb.
