Thermal Expansion
Physics ⇒ Heat and Thermodynamics
Thermal Expansion starts at 7 and continues till grade 12.
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A glass beaker is filled to the brim with water at 20°C. If both the beaker and water are heated to 80°C, will the water overflow? Explain.
A metal ball fits exactly through a ring at 20°C. If both are heated to 100°C, will the ball still fit through the ring? Explain.
Define the coefficient of linear expansion.
Describe a practical application of thermal expansion in everyday life.
Describe the difference between linear, area, and volume expansion.
A brass rod and an iron rod of equal lengths are heated by the same amount. If the coefficient of linear expansion of brass is greater than that of iron, which rod will expand more?
A glass beaker is filled to the brim with water at 20°C. If both the beaker and water are heated to 80°C, will the water overflow? Explain.
A metal ball fits exactly through a ring at 20°C. If both are heated to 100°C, will the ball still fit through the ring? Explain.
Which of the following is NOT a consequence of thermal expansion?
(1) Cracking of concrete roads
(2) Bursting of water pipes in winter
(3) Loosening of metal lids on jars when heated
(4) Expansion joints in bridges
Which of the following is NOT affected by thermal expansion?
(1) Length
(2) Mass
(3) Area
(4) Volume
Which of the following is the best explanation for the use of expansion joints in concrete pavements?
(1) To allow for contraction in winter
(2) To allow for expansion in summer
(3) To prevent water seepage
(4) To increase friction
Which of the following is the correct relationship for isotropic solids?
(1) β = 2α
(2) γ = 2α
(3) β = 3α
(4) γ = 3α
Fill in the blank: The anomalous expansion of water is important for the survival of ______ in cold climates.
Fill in the blank: The coefficient of volume expansion (γ) is approximately ______ times the coefficient of linear expansion (α) for isotropic solids.
Fill in the blank: The expansion of a liquid is usually measured using a ______.
Fill in the blank: The SI unit of the coefficient of linear expansion is ______.
True or False: The coefficient of linear expansion for a material is constant over all temperature ranges.
True or False: The coefficient of linear expansion is the same for all materials.
True or False: The expansion of a material depends only on its initial length and temperature change, not on its material properties.
True or False: Water contracts when heated from 0°C to 4°C.
