2 votes

How thick must a concrete or block wall be to withstand hydrostatic pressures up to three meters' height?

A retaining wall to support wet soil (saturated, maybe) has to withstand this loading plus any additional earthquake loads which are usually a factor of 1.15 to 1.25 in our city of Los Angeles. $P=\...
kamran's user avatar
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2 votes
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Are there hydraulic torque converters that are specifically built to work like reduction gearboxes?

Torque converters as used in passenger cars commonly operate over ranges of between 2:1 and 4:1 for output RPM. The maximum torque multiplication (and rpm "division") occurs essentially at ...
niels nielsen's user avatar
2 votes
Accepted

Could a hybrid system of mechanical levers and hydrostatic/hydraulic cylinders be able to lift 200+ kg with the force of an arm?

Levers and hydraulic cylinders are not typically used for the distribution of force, but are more frequently used to transmit and otherwise modify applied force. Per your reference to class one levers,...
fred_dot_u's user avatar
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2 votes

How do I calculate magnitude of shear force per unit of length when all I'm given is the diameter?

Velocity profile does not require the length. And for the other items, they are asking "per unit length," which means you can set $L=1$. More precisely, if you get some answer for pressure ...
RC_23's user avatar
  • 781
2 votes

Is my basement flooding because the city floods a neighboring field to make an ice rink?

Make a small diameter bore hole outside the house and put in a float indicator? Maybe a polystyrene float with a lightweight coloured rod running against a depth "ruler". Alternatively, a ...
Transistor's user avatar
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1 vote

Could someone help me with this physics problem about water pressure

Real Pillow Tank Typical soft-sided uncontained pillow tanks have a $\lesssim 1$ psi pressure relief valve (PRV) at the centre of the top, which is the highest point when the tank is filled. (See, for ...
David Bailey's user avatar
1 vote
Accepted

How to make a constant flow rate of water from a tank with a faucet at the bottom side?

I didn't know the answer to your question so I searched for "constant flow water valve" and found plenty of results. Here's one: Figure 1. When the pressure increases, the control rubber is ...
Transistor's user avatar
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1 vote
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Would connecting a small hydraulic pump to a larger hydraulic motor result in force multiplication?

The pump and motor shown are variable which means the flow and delivery pressure can be set or chosen or feedback controlled. However, a pump should be matched so that the max capability of the motor ...
Solar Mike's user avatar
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1 vote

Would connecting a small hydraulic pump to a larger hydraulic motor result in force multiplication?

A hydraulic pump in series could be theoretically be used to increase outlet pressure (assuming the inlet works at high pressure), but due to the positive displacement nature of hydraulic pups, could ...
Tiger Guy's user avatar
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1 vote

How to Calculate Pressure at a Elevated Tank's Tap

An easy way to think of this is to remember that every 10 m of water "head" raises the pressure by about 1 bar (= 1 atmoshpere). The other point to remember is that pressure difference is ...
Transistor's user avatar
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1 vote

What is the pressure of air trapped in glass of water turned upside down?

First we need to assume that there is not a perfect seal at the bottom of the container so that fluid can seep in and out. The pressure in the h section will drop until the difference between it and ...
Transistor's user avatar
  • 10.7k
1 vote

Hydrostatic forces

There are two approaches to solve this question. Approach 1- Vertical force acting on panel AB is equal to weight of fluid column above the panel and since there is no fluid above the panel here so ...
Max's user avatar
  • 88
1 vote
Accepted

Computation of the moment of restoring forces for a floating vessel

The gravitational force and the buoyancy force create what is known as a moment couple (or sometimes just couple). Essentially they are two equal (because buoyancy and gravity should be equal in a ...
NMech's user avatar
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1 vote

How is high static water pressure avoided in municipal water systems?

Note, the pressure in the pipe is rarely, if in any chance, equal to the natural head differential between the water source and the local. The water is conveyed down, through pipes or tunnels, to the ...
r13's user avatar
  • 8,174
1 vote

How is high static water pressure avoided in municipal water systems?

Where I live, the pressure is created due to reservoirs / lakes being up on mountains close to glaciers... One thing that is done is the use of pressure relief valves that control the pressure and ...
Solar Mike's user avatar
  • 15.7k
1 vote

Hydrostatic Pressure in Soil

Terzaghi's $ \sigma=\sigma' + u $ assumes 8 conditions. One of the assumptions is that the voids are interconnected and there is no air pockets. Hence the hydrostatic pore pressure and the implied ...
kamran's user avatar
  • 22.4k
1 vote

Determine the length of the tube

If the flow rate is 5ml/min, and you want to know how long a tube it will take 1 min to pass through, you’re effectively asking how long a tube contains 5ml. Volume of a cylinder is $\pi*r^2*h$. 5ml ...
Jonathan R Swift's user avatar
1 vote
Accepted

Archimedes Principle Question

A Buoy by definition has to float to be visible to the ships to alert the to the submerged obstacles or the depth datum. Assuming the weight of the sphere and the tie, W the sphere sinks such that ...
kamran's user avatar
  • 22.4k
1 vote

Hydrostatics pressure forces

$ F_1= 4*F_2 $ because the thrust is related to h squared. The forces acting on the gate are -8*F1 at the height of D1/3 and (+8/4)*F1 = 2*F1 acting at 1/6*D1. So they create a resultant acting ...
kamran's user avatar
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