How many times is the coefficient of area expansion(∆A/A)/∆T of a rectangular sheet of solid larger as compared to its linear expansivity a l is :
options:
(a)Once
(b)Twice
(c)Thrice
(d)Four times
PLEASE ANY PHYSICS GENIUS SOLVE THIS
THIS PROBLEM IS FROM HEAT AND THERMODYNAMICS
PLEASE EXPLAIN IT
NO SILLY ANSWERS PLS
Answers
Answer:
LEARNING OBJECTIVES
By the end of this section, you will be able to:
Define and describe thermal expansion.
Calculate the linear expansion of an object given its initial length, change in temperature, and coefficient of linear expansion.
Calculate the volume expansion of an object given its initial volume, change in temperature, and coefficient of volume expansion.
Calculate thermal stress on an object given its original volume, temperature change, volume change, and bulk modulus.
Figure (Figure_14_02_01.jpg)
Figure 1. Thermal expansion joints like these in the Auckland Harbour Bridge in New Zealand allow bridges to change length without buckling. (credit: Ingolfson, Wikimedia Commons)
The expansion of alcohol in a thermometer is one of many commonly encountered examples of thermal expansion, the change in size or volume of a given mass with temperature. Hot air rises because its volume increases, which causes the hot air’s density to be smaller than the density of surrounding air, causing a buoyant (upward) force on the hot air. The same happens in all liquids and gases, driving natural heat transfer upwards in homes, oceans, and weather systems. Solids also undergo thermal expansion. Railroad tracks and bridges, for example, have expansion joints to allow them to freely expand and contract with temperature changes.
What are the basic properties
Explanation:
so option b is correct..........
