图示为复式比压计，各点的高度如图所示，已知油的密度为ρ油=800kg/m 3 ，水银的密度为水的密度13.6倍，求A，B两点的压强差。 https://assets.asklib.com/images/image2/2018080109303468425.jpg

A . 2MPa B . 3Mpa C . 5MPa D . 7MPa

A .https://assets.asklib.com/psource/2015110109075253608.jpg B .https://assets.asklib.com/psource/2015110109080629492.jpg C .https://assets.asklib.com/psource/2015110109082340737.jpg D .https://assets.asklib.com/psource/2015110109084511437.jpg

A . 3 B . 4 C . 5 D . 6

A . A、228.2t B . B、229.1t C . C、234.2t D . D、234.5t

<img src='https://img2.soutiyun.com/ask/uploadfile/5328001-5331000/715bb6a66500145f74649ac0e3b4350a.jpg' /> A.<img src='https://img2.soutiyun.com/ask/uploadfile/5328001-5331000/78a4d4b37044baa1239184a11967ebcb.jpg' /> B.<img src='https://img2.soutiyun.com/ask/uploadfile/5328001-5331000/a6ce0261cbabf4ad00dc91664bf91e3a.jpg' /> C.<img src='https://img2.soutiyun.com/ask/uploadfile/5328001-5331000/351e8fe9d8e33ced6bbe49ccb52a076d.jpg' /> D.<img src='https://img2.soutiyun.com/ask/uploadfile/5328001-5331000/49f0cfd652d7213a13e46c13b1750830.jpg' />

<img src='https://img2.soutiyun.com/ask/uploadfile/5088001-5091000/0a17aa9b2811a784c73e007ea80e7b60.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/5088001-5091000/5089780/onerrorimg.jpg' />

图示矩形截面梁，截面高度为h，材料线膨胀系数为α．温度变化如图所示，B点的水平位移为______αtl(→)。 <img src='https://img2.soutiyun.com/ask/2019-11-17/942869597858498.png' />

用水银比压计量测管中水流，过流断面中点流速u。如图，测得A点的比压计读数<img src='https://img2.soutiyun.com/ask/2020-07-31/965038909522279.png' />h=60mm汞柱。(1)求该点的流速u，(2)若管中流体密度为0.8g/cm³的油,<img src='https://img2.soutiyun.com/ask/2020-07-31/965038909522279.png' />h不变,该点流速为若干，不计损失。 <img src='https://img2.soutiyun.com/ask/2020-07-31/965038934752722.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/3714001-3717000/3716602/ct_jggysbnjsj_jggysbnjschoose_0042(106).jpg' /> A．0.1m3/s B．0.2m3/s C．1m3/s D．2m3/5

γ_水=133.28kN/m³.h₁=0.2m.问水银柱高度差h₂是多少？ <img src='https://img2.soutiyun.com/ask/2020-09-22/969642502065895.png' />

如图8.12(a)所示，厚度为b的“无限大”均匀带电平板，其电荷体密度为ρ，求板内外任一点的电场强度。 <img src='https://img2.soutiyun.com/ask/2020-04-21/956329224429095.png' />

A．107.6kN/和-6.6kN/ B．107.6kN/和6.6kN/ C．120.6kN/和-6.6kN/ D．120.6kN/和6.6kN/

<img src='https://img2.soutiyun.com/ask/2020-09-23/969706337375393.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18348001-18351000/18349833/2015062416160476879.jpg' /> A．2MPa B． 3Mpa C． 5MPa D． 7MPa

A．1.6 B．4 C．16 D．21

设有一容器盛有两种液体(油和水)，如图所示。已知h1=0.6m，h2=1.0m，a= 60°，油的密度ρ0=800kg/m^3，试绘出容器壁侧影AB上的静压强分布图，并求出作用在侧壁AB单位宽度(b= 1m)上静止液体的总压力。 <img src='https://img2.soutiyun.com/ask/2020-07-15/963658794634082.png' />