What is Tank: Definition and 734 Discussions

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.

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  1. jmex

    Lame question on tank analysis

    Hello all, I am trying to understand the inputs here. Let's suppose I have a water tank at home which is made of plastic. It is filled with water. So I am confused with the inputs. At first when I gave only hydrostatic pressure, the tank was safe. But when I added atmospheric pressure by...
  2. S

    Pressure in a tank with continuous flow

    I feel like this is easy to answer but I'm coming up with answers I don't trust. Basically, I have a tank of air where I want to keep the pressure at a certain value. Let's say 1 psig for the sake of argument. I have a 1/2" ID hose connecting to inlet flow to the tank and an outlet hose of 3/4"...
  3. H

    MHB Changing height in tank depending on time

    Hi, I have a mixing tank with 2 inputs and 1 output The volume in the tank is not constant The cross section area is constant How can I build a mathematical formula for changing high h in the tank depending on the time? I have done this: (V/dt)in − (V/dt)out =A*d(h)/dt
  4. R

    When is the tank empty? [differential equation]

    Homework Statement problem 23: A large tank is filled to capacity with 500 gallons of pure water. Brine containing 2 lbs of salt per gallon is pumped into the tank at a rate of 5 gal/min. The well mixed solution is pumped out at the same rate. Find the number A(t) of lbs of salt in the tank at...
  5. yecko

    ODE problem -- Find the amount salt in the tank as water flows through it

    Homework Statement A tank originally contains 100 gal of fresh water. Then water containing 1/2 lb of salt per gallon is poured into the tank at a rate of 2 gal/min, and the mixture is allowed to leave at the same rate. After 10 min the process is stopped, and fresh water is poured into the...
  6. S

    Pressure trace of a tank fed by a compressor

    G'Day All, This is my first post so please let me know if I have completed this form incorrectly, or missed a point of etiquette etc... 1. Homework Statement The problem is to determine the pressurisation rate of a tank being filled by a pipe connected to a compressor. Assumptions: Pipe...
  7. Conductivity

    Pressure just before the hole in a draining tank

    Homework Statement In the given picture, A cylindrical tank has a viscous fluid with density 800 kg/m^3 and viscosity of 0.8 Pa.s. A small pipe is attached to the tank with a cross sectional area of 1 cm^2. If Q = 3.12 x 10^-6 m^3/s, Find h1, h2 ,x Homework Equations Q = pi delta P a^4/(8 n...
  8. queenmurr

    Calculating λ in a ripple tank lab

    Homework Statement This isn't really an actual homework question but it is regarding a lab so I think it belongs here. In the ripple tank lab I have to trace the nodal lines, plot 3 points in the middle of the 2 lines (one closest to the two sources, one in the middle and one the farthest)...
  9. L

    Finding the density inside a tank as air escapes

    Homework Statement A tank of constant volume V contains air at an initial density pi. Air is discharged isothermally from the tank at a constant volumetric rate of Q (with SI units of m^3/s). Assuming that the discharged air has the same density as that of the air in the tank, find an...
  10. DaTario

    Fringes in a One Slit Experiment with a water tank

    Hello All, I would like to know why it´s so difficult to find information about the generation of fringes in a one slit interference experiment in a water tank. Best Regards, DaTario
  11. P

    Physics of a tank of water (aquarium on a moving vehicle)

    I'm sorry if I am intruding on this forum, but I have a question that requires a knowledge of physics. I am preparing a plan now to convert a school bus into an RV. I have raised tropical fish all of my life and would like to keep doing so. I want to put a 125 aquarium in my RV so that it is...
  12. Low-Q

    Confusion about potential energy in a tank filled with water

    I have a discussion going on with some friends. The discussion goes like this: We have two identical tanks. One is empty. One is full of water. Both placed on the ground. They are connected with a hose at the bottom. There is a ball valve in line with the hose. The full tank has a given...
  13. C

    Variable Space Vacuum Tank - Pump question help

    This process and mechanism is very difficult to explain via the computer and even during presentations many people simply do not grasp the concept so I am trying my best to explain it easily and ask my questions as best as I can so that you guys understand me. I really need help with these few...
  14. N

    Installing Chemical Storage Tank: Pressure of Liquid or Gas?

    Hello Forum, I'm looking to install a new chemical storage tank at my site. The tank itself is not rated for vacuum. We will have proper ventilation and nitrogen pumping into the tank to compensate when we are pumping out of the bottom. However, I do want to include a pressure transmitter on...
  15. M

    Pressure drop across a valve in tank

    Hey I've gotten some good answers here before, so I'm giving it another try: Recently I attended a building-engineering meeting, and trying to learn something new (or refresh old knowledge in some cases..) I had a hydrodynamic question/case. My firm is engineering a concrete tank for a water...
  16. E

    B Liquid Flow Calculation out of a pressurized tank

    I am an engineer who needs to help my chemical transport girl friend with a little basic physics. It has been about 35 years since basic physics for me so I am rusty. She wants to understand how to calculate the following: She drives a large tanker (cylindrical) which carries a variety of...
  17. D

    Water level rise in a tank, continuous flow in, high exit

    Homework Statement : See below paragraphs[/B] Homework Equations : I'm not sure on which equations I need.[/B] The Attempt at a Solution : I'm so sorry, this really isn't my strong point. Using the figures below, the tank surface is 113.184 sq in. The side pipe has a cross section area of 3.14...
  18. S

    Can someone help me find a method to measure water level in a tank

    At the outset I am a novice in physics. i have constructed a rain water storing tank with a capicity of 1,20,000 litres. I propose to seal the tank so that there is no light penetrating inside the tank. My question now is how do I measure how many feet of water is left inside the tank? Can...
  19. F

    I Solving the Mystery: Which Tank Fills First?

    I originally thought tank K because the area in tank J is much larger than the area in the pipe connecting J to I But then I realize Bernoulli's equation does not include volume but only includes height. H_1, H_2 = height of water tank J, height of water in pipe between tanks J and I P, p, V =...
  20. R

    Calculating Water Volume in a Tank Using Pressure Measurements

    Homework Statement on a flat desk is an aquarium with a volume of 640 cm3 ,t's not full of water. The pressure to the bottom of the aquarium is 3 times bigger than to one side of it, how much water is in the tank? Homework Equations is the pressure, is the normal force, is the area of...
  21. Anachronist

    Water flow from pressurized tank - versus temperature

    Bernoulli's equation gives us this as the flow rate from a pressurized tank: $$v = C_v \sqrt{2gh + \frac{p}{\rho}}$$ where ##C_v## is the velocity coefficient, ##g## is the acceleration due to gravity, ##h## is the height of the water above the exit hole, ##p## is the excess pressure above...
  22. G

    Angular velocity tank receiving cereal

    Homework Statement The cylindrical container, when empty, has the moment of inertia of 2.0 Kgm^2 around the axis of rotation. It is rotating freely on its axis 20 revolutions per minute, when it begins to receive cereal, which falls vertically along its axis at the rate of 0.5 kg-1. The radius...
  23. A

    Fluid Dynamics - Water Storage Tank

    Hi All, Looking for some help (any is greatly appreciated). I've been tasked with the below, and am unable to find a worked example to cross check my work against. If anyone with a greater knowledge than me could have a look at the below and advise if I'm right the right track. Thanks 1...
  24. PHstud

    Liquid to gas expansion temperature change in a tank

    Hello ! I have troube doing a calculation. Let's say we have a volume Vi in a tank at a pressure Pi. If I let my tank open, the tank's liquid will start to boil to keep the pressure Pi inside the tank. Now, at the end, I will have a volume Vf in the tank, and still a pressure Pi. But the...
  25. J

    Calculating Filling Time for a Diving Tank with Changing Hydrostatic Pressure

    Hey, Let's imagine I have a tank, filled with air at atmospheric pressure. This tank have a closing/opening valve. I dive this tank at 100m under water and opened ce valve, my filling speed will be sqrt( 2*g*h) with h=100m. Now, if i want to dive the tank (with a volume X) continuously at a...
  26. G

    Calculating Flow from Tank to Vessel w/ Power

    I am trying to calculate the flow in a system from an underground tank up through a pump into a vessel. But cannot find or derive a formula that yields a good result, I don't think I can use the same head calculations as Velocity will have changed. 1. Homework Statement ρ = 1000 kg m–3 μ =...
  27. Miguel Velasquez

    Forces due to atmospheric pressure won't cancel in an open tank

    Homework Statement [/B] I am trying to understand why books always point as a fact that hydrostatic force on the bottom of a open liquid filled tank doesn't depend on the force due atmospheric pressure because they these forces cancels each other. Homework Equations [/B] P=[P][/o]+ρgh F=P*A...
  28. T

    Calculating Gasoline Tank Depth and Volume

    Homework Statement (a) A rectangular gasoline tank can hold 39.0 kg of gasoline when full. What is the depth of the tank if it is 0.450 m wide by 0.900 m long? m (b) What is the volume of the tank? (It is suitable for a passenger car.) gal Homework Equations Density of gas=719.7=mass/volume...
  29. HethensEnd25

    Well insulated tank with valve entropy problem

    Homework Statement A well-insulated tank of volume 6 m3 is divided into two equal volumes. The left part is initially filled with air at 100 C and 2 bar, and right side cell is initially empty. A valve connecting two cells will be opened so that gas will slowly pass from cell 1 to cell 2. The...
  30. R

    Calculating Pressure and Volume for an Air Cannon Tank

    Morning all, I am working on a Air Cannon Project and have hit a stumbling block. I am trying to work out what tank pressure and volume I would need to project a 1.4kg mass to 83m/s when it leaves the barrel. The barrel the mass will travel down is 4 meters long and 6inch in diameter, would...
  31. Dileep Ramisetty

    Tank outlet velocity exit pipe cross-section area dependence

    Sir, actually in a tank by the toricelli's law and also from bernoulli equation, we have outlet velocity as V= (2*g*H)^(1/2). In the case 2, I have closed the pipe exit partially with hand and observed a higher velocity than case 1, in practical. but when I applied the bernoulli...
  32. Lacplesis

    I Why Does Fire Not Travel Backwards in a Gas Hose During Ignition?

    Hi , a simple question arose in my head , why is that every time I have seen a hose attached to a gas tank being set on fire the fire always burns out of the end of he hose but the fire never travels backwards inside the hose back to the tank to explode it. the same I suppose happens to a...
  33. Togmeny

    Help with calculating tank weight wooden stand can handle

    Hi everyone, I am new here... please forgive me if my posting is imperfect :p I am planning to purchase a glass aquarium with tank dimensions: 48" (Length) * 24" (Depth) * 22" (Height) I wonder if a wooden stand with only edge support will be able to withstand the weight of the filled...
  34. karush

    MHB -9.3.15 A tank contains 200 gal of fresh water

    $\tiny{9.3.15}$ 4000 A tank contains 200 gal of fresh water. A solution containing 2 lb/gal of soluble lawn fertilizer runs into the tank at the rate of 1 gal/min, and the mixture is pumped out of the tank at the rate of 5 gal/min. Find the maximum amount of fertilizer in the tank and the time...
  35. H

    Method Of Loading Carbon Molecular Sieve To Psa Tank

    Dear all I want to loading about 14 ton of CMS (Carbon Molecular Sieve) into a PSA Nitrogen Producer tank. The tank is 5 meter tall with 2 m in diameter. What is the best, simplest and fastest method to load the pellet of CMS into that big tank? I consider this mortar screw pump and connect it...
  36. B

    Air volume in the tank, volume vs pressure

    New to forum Most air tanks are categorized on volume of air they hold . The question I have is this that a 5 gal air tank that holds 160 psi , is it equivalent to a tank that holds 2.5 gal of air at 320 PSI ? if not then is there a formula to figure this ratio . Thanks
  37. B

    Lateral pressure on tank walls

    Hello, We are an importer of SCUBA diving equipment and are building a pool. I see multiple formulas and opinions, I'm hoping for a KISS answer. Although I don't think Width or length has anything to do with my question, we are building a deep shaft pool that will be 25'Wx35'Lx88'D. What is the...
  38. Gunter1977

    Calculating a Submerged Tank: Questions & Answers

    Dear People I am busy with a tank that is submerged in water. The tank is mounted against concrete wall isolating the water. The tank is pressed against the wall due to the water pressure. When the tank is installed the water can be pumped away. The material used for the tank is stainless...
  39. R

    A Conductivity change of a tank (glass coating on steel)

    Suppose I have a tank which is made of steel coated with a thin layer of glass on the inside to protect the steel from corrosion (the material stored inside the tank is corrossive; say for arguments sake Water with 10% Hydochloric Acid). In theory, till the glass is intact there is an...
  40. JCB123

    I Air flow from atmosphere into a tank

    Hi, I have a tank of air which has been depressurized to 0.2bar (absolute) via a vacuum pump, where air can be let in from atmosphere through pipework controlled by a valve. What would be the equation I can use to determine the flow rate into the tank with time? As the flow rate is determined by...
  41. F

    Optimizing Water Tank Volume and Pressure for a Wet Fire System on Upper Floors

    Hi, a water tank will be put in the third level floor or slab. What must be the volume if gravity tank will be used so the pressure would be strong at 2nd floor and ground? It will be primarily a wet fire system. The tank won't be used for any other water applications since the building already...
  42. L

    Heat transfer between water tank and pipe system

    Hello All, I have a question for heat exchange calculation and hope someone can help. I would like to recover the "cooling energy" from a ice melting pool for air-conditioning for a small office. I plan to install three fan coil units with 800CFM for the office with closed loop water pipe to...
  43. W

    Programs Weapons Engineering: best minors for tank designing

    I plan on going into the weapons engineering field and I want to design tanks. Either the armor or the gun. Both fascinate me and I was just wondering, what is the best minor to mechanical engineering for both career options? Materials for the armor and electronic for the gun?
  44. J

    MHB Cone shaped tank, derivative

    Desperate times call for desperate measures. I hope someone can show me how to do this. I don't want to offend anyone, but the truth is i have no work to show. I have exam on monday and i know a task like this will be given, exactly the same just different numbers. I have no vision on studying...
  45. M

    How can the amount of salt in a tank be maintained while adding more solution?

    1. The problem statement, all variables and given/known d Let's say there's a tank filled with a solution to its maximum volume V. Initially, the solution in V is water mixed with some amount of salt S. The objective is to add more of a solution also consisting of water and salt such that the...
  46. H

    Sealed tank pressure evolution

    Hi all, I have some troubles with some basics thermodynamic rules. I have a sealed tank filled with fuel at Patm and at a temperature T. In this tank after filling, is composed of 3/4 liquid and 1/4 gas. I was wondering how the pressure inside the tank will change if we change the boundaries...
  47. A

    L-shaped tank problem; forces due to water pressure

    Homework Statement HELP! L-shaped tank problem! figure: http://www.webassign.net/hrw/hrw7_14-33.gif The L-shaped tank shown below is filled with water and is open at the top. (a) If d = 7.0 m, what is the force on face A due to the water? (b) What is the force on face B due to the water...
  48. samg1

    Ordinary Differential Equation - tank with inflow and outflo

    Homework Statement A tank contains 60 kg of salt and 2000 L of water. A solution of a concentration 0.015 kg of salt per liter enters a tank at the rate 6 L/min. The solution is mixed and drains from the tank at the same rate. Find the amount of salt in kg at t = 3 hours Find the...
  49. A

    Air Tank Discharging Through A Nozzle - Unsteady Flow

    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...
  50. G

    Compressible air flow from a tank through a regulator

    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...
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