교과서 질문
Identify each of the following changes of state as melting, freezing, sublimation, or deposition:
c. Heat is removed from 125 g of liquid water at 0 °C.
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3. Matter and Energy
States of Matter
객관식
Which of the following choices will have the lowest observed viscosity?
A
Water
B
Helium gas
C
Molasses
D
Tar
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Understand the concept of viscosity: Viscosity is a measure of a fluid's resistance to flow. Higher viscosity means the fluid flows more slowly, while lower viscosity means it flows more easily.
Identify the states of matter for each substance: Water is a liquid, molasses is a thick liquid, tar is a very thick liquid, and helium is a gas.
Consider the general viscosity of gases versus liquids: Gases typically have much lower viscosity compared to liquids because the particles in a gas are much further apart and move more freely.
Compare the substances: Water, molasses, and tar are all liquids with varying degrees of thickness, while helium is a gas.
Conclude that helium gas, being a gas, will have the lowest viscosity compared to the liquids listed, as gases generally have lower viscosity than liquids.
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