[问答题]
If a fluid is contained in a long, narrow vessel so it can expl t;5q95rx y (nn gkz;lhvv.)u;4ren kwj lt487k9u6wqjej3wand in essentially onj;ew 4jl38wuqtkk 6nw974 j ree direction only, show that the effective coefficient of linear expansion is approximately equal to the coefficient of volume expansion $\beta$.
