SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Put the thermometer in a cup of soup
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Put the thermometer in a cup of ice
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Put the thermometer in a cup of coffee
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Put the thermometer in a person’s mouth
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Detailed explanation-1: -When the thermometer is placed in cold water, the molecules slow down and their attractions bring them a little closer together bringing them down the tube. The red liquid is contained in a very thin tube so that a small difference in the volume of the liquid will be noticeable.
Detailed explanation-2: -It is developed for measuring the human body temperature. It is a long narrow glass tube with a bulb containing mercury at the end. The normal human body temperature is 37˚C, which can fluctuate between the ranges 35˚C to 42˚C. Hence, the clinical thermometers range from 35˚C to 42˚C.
Detailed explanation-3: -The faster-moving atoms and molecules transfer some of their energy to the slower-moving atoms and molecules. The atoms and molecules of the hotter substance slow down, and its temperature decreases.
Detailed explanation-4: -The liquid in the thermometer goes up when the thermometer is heated because heating makes the alcohol molecules of the liquid move faster. The extra speed of the molecules competes with their attraction for one another and causes them to move slightly further apart.