单项选择题

如图所示，夹角呈60º的分岔管水流射入大气，干管及管的轴线处于同一水平面上。已知v2＝v3＝10m/s，d1＝200mm，d2＝120mm，d3＝100mm，忽略水头损失，试求水流对分岔管的作用力在y轴上的分量Fy等于（）。
A. 0.17kN B. 0.21kN C. 0.35kN D. 0.49kN

相关考题

Mr. Taylor haw been hired by Chris Co., a manufacturer ...

单项选择题Mr. Taylor haw been hired by Chris Co., a manufacturer of precious metal jewelry. Chris Co. has been having significant issues with some of their major stakeholders such as poor quality from their suppliers and complaints from their customers. Mr. Taylor has been hired to help resolve these issues and to help build a plan for resolving the company’s problem with their major stakeholders.

Mr. Taylor finds out how critical each stakeholder is to the organization’s decisions and actions. This is the ____________.
A.
first step
B.
second step C.
third step D.
final step

冲压生产工序可分为分离工序和成形工序两大类。

判断题冲压生产工序可分为分离工序和成形工序两大类。

在进行沥青路面用粗集料压碎值试验中，将试件分三次倒入试筒内，每次表面整平后，用金属棒夯击（）次。 ...

单项选择题在进行沥青路面用粗集料压碎值试验中，将试件分三次倒入试筒内，每次表面整平后，用金属棒夯击（     ）次。
A 20次
B 25次
C 30次
D
35次

（分值：10.00分)