蒸汽在喷嘴出口的理想速度为341m/s,喷嘴的速度系数为0.96,求蒸汽在喷嘴出口的实际速度。
参考答案:
实际速度
C1=341×0.96=327.36(m/s)
以石墨棒作电极,电解氯化铜溶液,若电解时转移的电子数是3.01×1023,则此时在阴极上析出铜的质量是( )
A.8g
B.16g
C.32g
D.64g
Not a single word_______when _______about his late mother.
A.he said, asked
B.did he say, asked
C.he said, asking
D.did he say, asking