Tank Definition and 736 Threads

Hey, So I have a system where there is an air tank (0.2Litres @ 3000psi, 293K) and I have a convergent-divergent nozzle attached directly to it. What I want to know is an expression for how the mass flow rate varies with time as the mass in the tank decreases causing the pressure to decrease...

This is probably a simple question but I am really struggling as to where to start. We have a tank of compressed air, Volume of tank (V1) = 0.2litres Pressure of tank (P1) = 206.8 bar Regulator Pressure (P2) = 58.6 bar I would like to find the volume of air that can pass through the regulator...

Homework Statement Use Bernoulli’s equation to calculate how fast the water emerges from the open tap (at position 2) in the figure(a). You may assume that the water at position 1 moves negligibly slowly (b) The tap is rotated to create a fountain as shown in (b) Calculate the maximum height h...

According to NFPA 11, subsurface foam injection can't be used on IFR tanks with fixed/covered roof. However, this has been done for a long time by various companies and there doesn't seem to be any issues with that. Can anyone give their opinion based on knowledge/experience why this should not...

East Coast faces gas shortages, price hikes after pipeline leak (CNN.com) That pipeline passes about 20-30 miles from here. This morning I stopped at my usual gas station, one of the cheapest around here. There were more people there than usual, and a couple of the pumps had gone empty. While...

We discovered a leak in a SF6 gas HV circuit breaker. Since we don't know when the leak occurred due to temperature changes I assume there is only air left in the tank. Here is my question. Suppose I have a tank with a fixed volume filled with air at the same pressure as the atmospheric...

Hello Forum, Humans breath by inhaling and exhaling air at 1 atm of pressure (which is ~15lbs/in^2). Air pushes from the outside on every inch of our body with a force of 15lbs but an equal force is pushing from the inside. The net force is zero. The water pressure increases linearly with...

Homework Statement i am asked to find the value of y in this question . I am not sure should i consider the atmospheric pressure acting on the mercury or not . Homework EquationsThe Attempt at a Solution i choose to consider the atmospheric pressure as 0 in this case . So , my working is...

Homework Statement A rectangular tank contains 6L of freshwater, has a floor area of 0.3m^2 and floats upright in freshwater. If the bottom of the tank is 150mm below the surface of the water, calculate the mass of the tank. Homework Equations F=P*A=pgAh The Attempt at a Solution...

Homework Statement Pressure drops in welders tank of oxygen gas from p1=150atm to p2=120atm . How much of the gas will be used ? Homework Equations The Attempt at a Solution In my mind the simplest way of looking at this problem is to consider the process isothermal. But then the volume of...

I have water draining from a tank A into a tank B through a hole (or short pipe) and then being pumped back from B to A. If I know the rate of the pump (say 19 liters per minute), what should the diameter of the hole be so that the volume of tank A remains the same? The actual volume of A is...

Homework Statement [/B] A pressurized cylindrical tank, 5m in diameter, contains water which emerges from the pipe at point C with a velocity of 25 m/s. Point A is 10m above point B and point C is 3m above point B. The area of the pipe at point B is 0.07 m2 and the pipe narrows to an area of...

Homework Statement Homework Equations The Attempt at a Solution There is solved problem on change in water height with respect to time. I understand it but there is the b part of the question. It asks that what's if the top of the tank is open to the atmosphere? I think nothing would...

What kind and value is the friction coefficient of tank tracks on the move, when force is applied forward in the direction of the tracks movement? Is the friction coefficient in that case, closer to kinetic/sliding coefficient or to a rolling resistance coefficient? What about the sideways...

Homework Statement A container of height H has a orifice at a distance h from the top, the ratio of the cross section area of container and orifice is. 1, find velocity of efflux Homework Equations Using Bernoullis equation we get v=(2gh)^.5 Equation of continuity A1V1=A2V2 The Attempt at a...

Since the resonant frequency of a tank circuit, is completely adjustable, and controlled by the value inductor and capacitor you use, I was wondering if it had any other uses, other than increasing its impedance at its resonant frequency. Can if be used to produce ac signals of its resonant...

Homework Statement in this question , the author stated that the P1 = P atm , but at point 1 , the gas tank is not open to the atmosphere, it is a closed tank . so , is the author wrong ? again , at point 2 , the tank isn't open to atmosphere, why it is P2= P atm ? Homework EquationsThe...

Homework Statement An open cylindrical tank of acid rests at the edge of a table 2.20\cdot 10^0\ m above the floor of the chemistry lab. If this tank springs a small hole in the side at its base, how far from the foot of the table will the acid hit the floor if the acid in the tank is...

Here is some background to the problem (in a stirred tank): "With yield stress non-Newtonian (viscoplastic) fluids, it is possible to generate an agitated volume around the impeller, defined as a cavern, surrounded by a stagnant region where the shear stress is insufficient to overcome the...

Using Bernoulli's equation to calculate the velocity of fluid draining from a tank seems to give no weightage to the area of the drainage hole. But based on the mass continuity principle, the area of the hole should have an impact. Does the area of a drainage hole have an impact on the fluid...

Homework Statement A cylinder water tank its radius 0.5 m, its height is 2 m and it is full of water. Determine the work done to move the water to a height of 4 meters above the height of the cylinder water tank. Another question related to it is: An uniform iron chain its length is 10 m and...

I have a project to build a water level control system. Basically I will have two sensor probes one connected near the bottom and the other near the top. When the water level goes below the bottom sensor it will trigger a pump to pump water back into the tank until it reaches the top sensor...

Homework Statement Assume that there is a tank on a 200 ft pedestal type support. When full the tank and contents have a weight of 50,000 lbs and it is never drained to a point where the tank and contents have a weight less than 20,000 lbs. Assume the pedestal weight is negligible compared to...

I am currently working on something and I would like to know something. When we connect two tanks and we have water flowing into Tank 1. Is it possible to make a connection between Tank 1 and Tank 2 so the water level in Tank 2 is higher than water level in Tank 1?

This is not homework, but something work-related. However, I will post it here since it's homework-relatable. 1. Homework Statement Known variables: Qin , A (and obviously the diameter D of the pipe as well as g = 9.81 m/s2). The pipe outlet and the top of the tank is at atmospheric...

I'll be using a mass balance calc for a tank design at work. We are designing a tank that has an automatic float switch on it, attached to a valve which will start filling the tank when the water level drops below a certain point. This tank is intended to drain quickly (flow rate not known at...

T1. Homework Statement a wooden ball of mass m is kept inside water by the help of a massless string shown in the figure. One end of the string is fixed at the bottom of the vessel. when the vessel containing the water is accelerated upwards with acceleration a , will the tension increase and...

Homework Statement A cart has a tank of water on it which has a nozzle. Water jets out from the nozzle onto a turn vane oriented at theta = 30° which deflects the flow upward. The cart is held stationary by a rope as shown in the image below. Find the force in the rope if the velocity of the...

Homework Statement In a tank full of water, the pressure on a surface 2 meters below the water level is 1.5 kPa. What is the pressure on a surface 6 meters below the water level? Homework Equations Isn't this impossible? The equation given is P=hdg. (height of water column x density x...

Homework Statement why the vertical rise of the surface is given by the formula as shown in the notes ? shouldn't it = Δs = (g +az ) Δx / ax ? Homework EquationsThe Attempt at a Solution

Hello All, I am trying to figure out the solution to a problem I am trying to do for fun. I've been trying this for a while and has annoyed me so any help is greatly appreciated! I attached a picture of the problem/ control area to help...

How can I calculate the thrust of an underpressure tank of air when the valve is released? If you can, please, explain in detail. Thank you!

Homework Statement In the attached file. Homework Equations P1/rhoe+v1^2/2+gh1=P2/rhoe+v2^2/2+gh2 The Attempt at a Solution I do not know how to begin it; however, I think part(iii) is the same as part (iv)[/B]

Homework Statement For a rigid, impervious, closed tank - The volume of tank is filled with 70% water and the rest is with air- The initial temperature of the tank is 20 °C, and the absolute pressure is 1 bar. - What would be the final pressure if we raise the temperature to 200 °C? Homework...

Having difficulty remembering how to model a simple heat transfer equation for a liquid tank/piping system and wondering if anyone can provide some quick help. I have a 1000L tank of water that is heated by a 1kW heater (target temp of 43°C). The piping system (outside of the tank), holds 100L...

Hello guys, Consider a partially filled tank with water where the acoustic field can be described by the Helmholtz equation. The boundary condition at the water surface would be \frac{∂p}{∂\vec{n}} = -j\rho_0\omega\frac{p}{Z} where Z is the impedance of the water surface. What would be...

Homework Statement Three pumps are attached to a three-dimensional tank. They pump water into the tank at a constant rate. Pump A when turned on alone fills up the tank in 15min. Pump B when turned on alone fills up the tank in 30min. Pump C when turned on alone fills up the tank in 60min...

I have a tank which is 1320Litres. The constant outflow from the tank is 800Litres/Hr. I want to maintain the level of the water in the tank at a stagnant level and I need to find water rate of inflow at which I can achieve this equilibrium. Any help

I am wondering why LC tank only oscillates at resonant frequency not other frequencies? Is there a physics explanation for that?

Hi.. I am working on a project where I need pressurized air from one tank to fill another chamber at lower pressure. I have values for input pressure, required final pressure and diameter of the short flow pipe. I understand that the density and flow rate of air will keep on changing as the...

Hi, I've completed an experiment in which I measured the height of the water in the tank with time. I plotted my results on graph paper as a graph of height against time, resulting in a curve of decreasing gradient, slightly resembling that of the e^(-kx) graph. 1) I am asked to symbolically...

How does the physics in a vape tank work? Specifically, if I closed the airflow off and sucked from the top wouldn't it increase the pressure inside of the tank and allow the liquid to soak the cotton? http://imgur.com/7bZcdRI That may help confusion. I do not know physics terms.

Experts, I need to calculate how long does it take to drain a tank through port in bottom of the tank, but not any other parts of this system is exposed to atmosphere. So as the tank drains, it creates negative pressure at top of the fluid inside the tank? any formula to calculate the time...

1. The problem statement, all variables and given/know In rural communities where landowners have their own water wells, large tanks are used to store water, which is pressurized by a sealed “air cushion”. Water is pumped intermittently from the well to restore the tank supply when the level is...

G'day Forum Members, I'm new to the forum I hope to get some great advice here for my projects! I have a slow progress DIY tank rack project going on: short story I bought a cheap steel shelving system which won't cut it for the project, so I'm going to build a timber setup which will be a...

Homework Statement A 0.2 m^3 steel container that has a mass of 30 kg is filled with liquid water. Initially both the steel tank and the water are at 50°C. Now heat is transferred, and the entire system (i.e., steel and water) cools to the surrounding air temperature of 25°C. Determine the...

I am kind of wondering how much for example CO2 you would put out or other greenhouse gases would be emitted everytime i use a full tank of gas. It would help me if you could explain it in volume, like how much it would take to contain the emissions on its own, and how much it would take to...

Homework Statement Q3.1 (a) A pump forces 1m^3 /min of water horizontally from an open well to a closed tank where the pressure is 0.9 Mpa.compute the work the pump must do upon the water in an hour just to force the water into the tank against the pressure.sketch the system upon which the work...

This is a conceptual question based on a project I and a few other engineers finished at work. We are replacing the roof of a concrete tank that is part of a larger pump station for a river. Unfortunately, the roof is very integral in this structure, which means that once it's removed, the walls...

Homework Statement What is the headspace pressure (air)? Closed tank part filled with fluid under pressure, there are tubes that indicate the fluid level and pressure. The tube on the left is open to atmosphere. fluid s.g. 1.2 x = 5m y= 1.7m Homework Equations See below The Attempt at a...