[填空题]
(a) Estimate the rms speed of an am69x b4,24 -fng tp .aefylgwaqino acid whose molecular0i8ip m6mru5s p)z 3yk mass is 89 u in a living cell at 37 sp)6i3 m riku0 85zpym$^{\circ} $ C. m/s
(b) What would be the rms speed of a protein of molecular mass 50,000 u at 37 $^{\circ} $ C? m/s