A tank is an armored fighting vehicle intended as a primary offensive weapon in front-line ground combat. Tank designs are a balance of heavy firepower, strong armor, and good battlefield mobility provided by tracks and a powerful engine; usually their main armament is mounted in a turret. They are a mainstay of modern 20th and 21st century ground forces and a key part of combined arms combat.
Modern tanks are versatile mobile land weapons platforms whose main armament is a large-caliber tank gun mounted in a rotating gun turret, supplemented by machine guns or other ranged weapons such as anti-tank guided missiles or rocket launchers. They have heavy vehicle armor which provides protection for the crew, the vehicle's munition storage, fuel tank and propulsion systems. The use of tracks rather than wheels provides improved operational mobility which allows the tank to overcome rugged terrain and adverse conditions such as mud and ice/snow better than wheeled vehicles, and thus be more flexibly positioned at advantageous locations on the battlefield. These features enable the tank to perform well in a variety of intense combat situations, simultaneously both offensively (with direct fire from their powerful main gun) and defensively (as fire support and defilade for friendly troops due to the near invulnerability to common infantry small arms and good resistance against most heavier weapons), all while maintaining the mobility needed to exploit changing tactical situations. Fully integrating tanks into modern military forces spawned a new era of combat: armored warfare.
Until the arrival of the main battle tank, tanks were typically categorized either by weight class (light, medium, heavy or superheavy tanks) or doctrinal purpose (breakthrough-, cavalry-, infantry- or reconnaissance tanks). Some being larger and very heavily armored and with large guns, while others are smaller, lightly armored, and equipped with a smaller caliber and lighter gun. These smaller tanks move over terrain with speed and agility and can perform a reconnaissance role in addition to engaging enemy targets. The smaller, faster tank would not normally engage in battle with a larger, heavily armored tank, except during a surprise flanking manoeuvre.
Dear Engineers,
I hope this message finds you well. I'm reaching out to seek guidance on a new project that I am undertaking: the construction of an Internal Floating Roof (IFR) tank with a dome roof. As I am relatively new to this position, this project presents a significant learning...
I want to measure tank circuit currents using *different* methods. Below is the tank circuit. The coupling transformer has 20 turns and has 10A @ 80khz going through it. This means there should be a maximum of 200A in the tank (20:1 turns ratio). I measure the voltage across the 2.6uF capacitor...
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If I have an old 5000 lt pressure tank and as I see it needs a change of its membrane (Bludder) what is the recommendation that must be followed and also what is the volume ratio between the membrane before using and after testing or working situations
I would think the first solution is correct but the provided solution to this problem suggests the 2nd solution. Let me know what you guys think about this. Thanks,
A typical UK domestic hot water tank holds c. 200 litres of water. Hitherto the common method of heating it to say 60C has been by means of an internal coil of copper pipe through which is pumped hot water from a gas boiler at ~ 70C. Heat transfer on the outside of the coil is by natural...
I can imagine the experiment: the pressure at the surface will drop while the tank is emptying (if no air bubbles enter through the evacuation of course, otherwise it restores the pressure atm at the surface). The flow speed decreases as a function of time until the external pressure maintains a...
If I have a air tank that is 1 cubic feet with the pressure gauge at 0 and I pump in air to 5000 psi how many cubic feet of a 100 psi would be in that tank? Any help would be appreciated
TL;DR Summary: Struggling to structure the problem and derive an analytical solution for gas expanding into other gas in a rigid tank. Preferred formulation is fixed control volumes. This is not a homework problem.
The problem:
Two control volumes (A and B) are in a rigid tank filled with air...
I take the origin to be at the apex of the cone. Using the similarity of the triangle, where ##r## is radius of water and ##y## is height of water from the apex of cone:
$$\frac{r}{y}=\frac{4}{10}$$
$$r=\frac{2}{5}y$$
The mass of water = ##\rho .V## = ##\rho . \pi r^2~\Delta y## = ##\rho . \pi...
Figure:
a) CASE A ##\rightarrow p_a=101300\, \textrm{Pa}##
$$F_{\textrm{res}}?,\,\, y_c-y_{cg}=y_{cp}$$
We find ##h_{cg}\rightarrow h_{cg}=3+h##
$$h=0,75\cdot \sin (30)=0,375\, \textrm{m}\rightarrow h_{cg}=3,375\, \textrm{m}$$
$$p_{cG}=\rho_{H2O}gh_{cg}=33108,75\, \textrm{Pa}$$
We calculate...
The general balance equation is as follow: d[m{u+gz+v2/2)sys=(u+gz+v2/2)dmin-(u+gz+v2/2)dmout +dq+dw.
I understand that I would take in consideration the cross sectional area as well as the mass flow rate. However I can't figure out what else to consider as if atm pressure should be considered...
I draw this diagram:
The formula for hydrostatic pressure is: ##P=\rho g h## so I just plug everything
$$P=1000 \times 9.8 \times 0.1=980 Pa$$
Will the acceleration of the cart affect the hydrostatic pressure?
Another thing that came to my mind was there would be extra force coming from...
My wife is wanting to place an empty alcohol bottle filled with Dawn in the toilet tank. Have a 1//16 hole drilled 3 inches from the bottom so the fluid will come out when flushed and the water level gets lower than the hole. The Dawn will stop coming out once the water refills above the hole...
Hey all,
I am working through some practice problems and am stuck at the following one:
"A cylindrical tank 10m high has an internal diameter of 4m. How much work would be required to fill the tank with water if the water were pumped in i.) at the bottom and ii.) over the top edge?"
Part i is...
Wondering if someone can help me with the following.
If I have a sewage pump drawing wastewater from a tank, but there is a small distance between the invert to the impeller and the suction line, how much flow will enter through the opening, versus from the suction line.
Can anyone explain in...
Tank volume is 768l plus the tank and rock to go inside
2000m x 640mm wide x 600mm high
Stand is made of 35mm square x 3mm wall thickness.
Tank width is the same as the steel frame, notice the tank is not over the end legs.
Wooden top is 50mm thick pined and glued planks...
4x top supports...
I'm writing a paper on the movie realism of the A-team movie. The basic situation is that the guys are falling inside a tank with terminal velocity into a lake. I'm stumped on how to calculate the force that is created on impact, though I imagined it being done with some kind of pulse equation...
a tank is filled with water up to its brim a hole was made at the bottom of tank find time taken to empty tank if water flows at rate of 2h kg/s where h is height of liquid column and is equal to 20m radius is equal to h/2
[Moderator's note: moved from a technical forum.]
Hi,
I have been calculating a series of hypothesis for some aquariums/tanks situations, using heat transfer equations (conduction, convection, radiation, evaporation)
Typically we have aquariums that run at higher temperatures than the surroundings in winter and lower temperature than the...
I was watching a YT video getting prepared for class this coming semester, and in the video, this diagram of a manometer was drawn (see image at end of message). The professor stated that the pressure in the tank (Pt) is = to the pressure at point A. Following this, he said that technically...
I am trying to determine the minimum piston weight/force that would be required to push the air from the air tank into the top of the supply tank, filling up the supply tank and purging the discarded water thru the outlet supply pipe. We can assume no friction loss and sufficient air in the air...
Hi, I´m quite lost and would appreciate guidance
I have solved for 2 tubes using Bernoulli´s equation before, but now how does it change?
Is it really going to rise water level inside? Why?
Considering a fish breeder decided to breed small fishes which needs a pH between 6,0 to 7,0 to stay alive. He needs to adjust the water's pH that is 5,0 to a value of 6.5, having available only calcium carbonate. The mass in mg added to 5L of water is about:
A)2,5
B)5,5
C)6,5
D)7,5
E)9,5
Covid is surging again due to the Delta Variant.
I saw in the news of many oxygen tanks with people connected to them even outside in hospital tents.
I'd like to know something. If a person accidentally given more oxygen than required, for example. 4 Liter/Minute instead of 2 Liter/Minute...
Hello all, I am trying to understand how a force at the opposite wall from water entering a pressurized air (atmospheric pressure) tank, and for this discussion it is rigid, with no relief valve to displace the compressed air can be deduced. I have created a simple illustration and believe this...
Hello,
In a piping system connected to the outlet of an crude oil tank, process man has located the expansion joint after the valve which is connected to tank's nozzle. Since this expansion joint is located after the valve, it must be able to withstand the design pressure of the piping system...
Hello everyone. I have to determine the tank volume and power requirement of a tank. The teacher has done it the following way, however, I don't understand the process.
I know that this should be a very simple problem, but I don't understand how to solve it without knowing the height at which the tank is separated from the rocket. I will be very grateful for any hint.
As I stated in the summary I'd like to calculate the required pressure and mass of a tank of hydrogen that would allow me to fill a second tank with 10kg of H2 at 700bar.
I am trying to get an idea of the feasibility of doing this, putting aside, for now, how the primary tank would itself be...
This is the set up to produce stationary wave. The oscillator on the left will produce wave on water surface then this wave will travel to right, reflected at the tank and the incoming and reflected wave will superpose to form stationary wave.
My teacher said when the water wave hits the tank...
Hi there, I'm doing a past exam paper Q and i'd like some help.
Assumptions are: The velocity in the tank is negligible and the hydrostatic head is 4m.
Pressure in the vessel:
Gauge pressure
1 bar g = 10^5 Pa
0.2 bar g = 20,000 Pa
Hydrostatic Pressure: (4)(9.81)(978) = 38,376.72 Pa
Absolute...
I found this interesting thermodynamics problem on another site. I thought PF members might find it challenging to attack. I'm not asking for help since I've already solved it. So pease feel free to present your entire solution if you desire.
Chet
Hello all I come to again seeking guidance... There is another thread but he seems to have pulled formulas from somewhere other than our learning materials to reach the conclusions.
Looking at this question and I can't figure out where to start really, the examples in out learning materials...
PROBLEM: A 120 gallon tank (26" diameter, 60" height) containing 40 Gallons of water is heated up until the tank ruptures from overpressure at 125 PSI (maximum tank rating). How to calculate the initial escaped steam velocity at the ruptured tank, assuming the gash is 2 feet long in the...
I'm stuck on part 1 at the moment. What I had so far was
Using the ideal gas model, we have
Solving these equations is reliant on the molar mass μ of the substance or the pressure p in the tank, which I don't know how to find with the given information. I sent an email to my professor and...
So I am working on a project where I have a tank, which has a volume of electrolyte liquid inside it. This is coupled to a battery which charges it, and gives it energy. I will have a copperband arround it, so i can measure a potential voltage from the electrical field.
So what I need to...
Hello everyone, I'm looking to estimate the variation of degassing on a horizontal tank of VC (vinyl chloride) due to solar radiation.
The feed flow is continuous but the outlet is batch flow. So there is a lot of variation of liquid level in the tank (constant pressure).
To avoid a lot of...
There is a lot of rusts in my water supply. I am suspecting the inside of my stainless steel pressure water tank is rusting.
But can the stainless steel pressure tank rust inside?
When i put magnet it doesn't stick to it.
I plan to replace it with very expensive Aquaflow pressure tank because...
Summary:: Consider the rectangular water tank, at the base the length is the same for 200 cm. There are 100 holes for water to come out which each hole have the same flow rate. Find the amount of water that come out in each hole by using differential when we know that there is an error in the...
Consider the rectangular water tank, at the base the length is the same for 200 cm. There are 100 holes for water to come out which each hole have the same flow rate. Find the amount of water that come out in each hole by using differential when we know that there is an error in the measurement...
Hi
I have read that the propane gas tank gauges that rely on pressure are useless because as you use the tank part of the liquid propane turns to gas raising the pressure again inside the tank.
What id like to know is then how do these gauges work?
And also I would like more detail on how...
there's a website to size an aquarium heater or chiller.
This is just for learning purposes (not for fish) but I have modified these parameters from default to perform a load calculation on a 100 gallon glass tank... For the tank temperature range I set to be between 150-160 degree F. and a...
I am going to be working on some calculations for an air surge tank to minimize fluctuations downstream of the tank in an engin'e intake syste, Any suggestions/sources where I could study for this?
Thank you!
tank with water is pushed from construction into freefall,
A is at 0.1m depth
B is at 10m depth (so manometer will show aprox 1bar of hydrostartic pressure when tank is at rest on construction)
from 0-5sec tank is accelrating,after 5sec tank is falling with constant speed..1)is hydrostatic...
Hi,
I'm hoping this will be a fairly easy question for someone on here to answer. If I wanted to make a (small?) vacuum tank (basically a hollow cylinder capped with two similarly hollow hemispheres - like so: (===)), how thick would the walls of the tank need to be for it to withstand the...
Hi PF!
Suppose I have a square tank of water. If I drive the tank of water such that it's height as a function of time is ##h(t) = \cos(t)##, ignoring gravity, is this the same thing as saying the tank is holding still but the pressure field is changing as ##p(t)=\cos(t)##?
Hello everyone.
I'm working on 3D animation about da Vinci tank and why it doesn't work.
Please help me find out how to compute:
1: how many men need to move this machine
2: what power on wheel can produce different number of man, like 1, 2, 4, 8..
vehicle mass = 8t
men strength = 60kg
lever...
Hi Folks,
I am exploring using Ultrasonic for LGP tank level measurement. I went through lots of readings, in particular use of SRF02 sensor. But, It's not conclusive.
Anyone has been exposed to solving such problem? If yes, kindly share return on your experience.
Appreciate!