[问答题]
If a fluid is contained tq 4fvehu3nndu2:t 5)coki5( in a long, narrow vessel 3wv8 g fzi f2j+w9iyfanw ,g,au0+d9dso it can expand in essentially one direction only, show that the ai,2a 90,fnw+vw y3i+jzug8d9 fwdfg effective coefficient of linear expansion is approximately equal to the coefficient of volume expansion $\beta$.
