Explain the phenomenon of capillarity. Obtain an expression for capillary rise of a liquid. (a) Distinguish between ideal fluids and real fluids. Explain the importance of compressibility in fluid flow. (b) Define the terms : density, sp...
〖capillaryphenomenon;capillarity〗与固体接触的液体表面升高或降低的作用,它决定于液体分子相互间和液体分子对固体分子的相对吸引力,这种作用在插入液体的毛细管中尤其容易观察到,它决定了管内外液面的高度差 毛线 máoxiàn 〖knittingwool〗原指羊毛纺成的线,后亦称用羊毛与人造毛混纺或单由人造毛纺成的线 ...