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. C

    MHB Solving for A:"Solving for A: Finding Salt Concentration in Tank After 10 mins

    Hello, I need some help with part a. The problem state: "Suppose a brine containing .2 kg of salt per liter run into a tank initially filled with 500L of water and 5 kg of salt. The brine enters the tank at a rate 5 L/min. The mixture, kept uniform by stirring, is flowing out at the rate of...
  2. sanderr2

    Simplistic fluid heat loss - water in a concrete tank

    Hi all, I'm sorry if this is an inappropriate question. I have built a basement swimming pool for my wife. Unfortunately I neglected to insulate outside the concrete and insulating inside the concrete has caused some construction issues so I am trying to work out the heat loss if I go ahead...
  3. Sirsh

    Thermodynamics: Heat Removed from Rigid Tank.

    Homework Statement In a rigid sealed tank, 0.32kg of saturated H2O vapour is cooled from 16 bar to 2.70 bar. Determine the heat removed in Kj. Homework Equations Q(12)-W(12)=U2-U1 The Attempt at a Solution Assuming that we're only looking at the saturated vapour internal energies, and there...
  4. Q

    Problem of a tank with trapezoidal section.

    Homework Statement A deposit of 20 feet long and 10 feet high, has a width of 8 feet at the bottom and 18 feet at the top. In the bottom is an orifice an area of 24 in2 and discharge coefficient of 0.60. If the tank is full calculate the time required for the lower level 6 feet. Consider full...
  5. Q

    Problem of a tank with a trapezoidal section

    Homework Statement In the figure are the dimensions, and the question is the time in which the take will empty Area of orifice 1 cm2 Discharge coefficient: 0.447 Gravity 10 m/s2 Homework Equations [/B] Area of surface = 8x = 8 (2 H) = 16H The Attempt at a Solution . The red lines are the...
  6. M

    How long will it take for a gas tank to empty?

    Hello all, I have an oxygen tank that is 10 L in volume, pressurized at 500 barr (pressure can be adjusted down to 1 barr out of the tube), and I want to 'bubble' the oxygen into a beaker of water. I will simply use a tube (diameter is around 0.5 cm) connected from the tank and with the other...
  7. A

    Adiabatic filling of a tank - Minimum work required

    Hi guys, need an help about that problem That's an adiabatic filling of a reservoir (tank) from a line. Line is at 350 K and 8 MPa. The tank is, in the final state, at 365 K and 6 MPa. Tank is insulated (no heat exchanged during the process), and only one stream enter in the tank. How can i...
  8. A

    Reflection/Refraction water tank question

    Homework Statement [/B] The 80-cm-tall, 65-cm-wide tank shown in the figure is completely filled with water. The tank has marks every 10 cm along one wall, and the 0 cm mark is barely submerged. As you stand beside the opposite wall, your eye is level with the top of the water. Part A asked...
  9. V

    Ripple tank - strobe frequency

    Homework Statement Say we are observing plane wave patterns on table. The depth of water is the same everywhere in ripple tank. The frequency of waves is 12 Hz and wave length is L (lamda). We see the wave pattern as stationer while looking at wave pattern through the slots of stroboscope which...
  10. JN Morris

    Calculate the pressure on an Onion Tank

    I am concerned about adding the Vapor pressure of 430 psi to the equation. Should it be done?? 1. Homework Statement Calculate the pressure produced by a 22-ft onion tank filled with a hydrocarbon fluid (0.72 sg). Vapor pressure is 430. Add 55 psi N2 to the total. What is the final pressure...
  11. S

    How to Solve a Variation of the Concentrating Salt Tank Problem?

    I have a variation on the concentrating tank problem that I'm having a bit of trouble solving. I have a tank of 10 kg of pure water at time 0. I add a time dependent concentration of salt and remove the same volume of pure water so that the tank volume never changes. Once the tank has 1 kg of...
  12. L

    Leaky Tank Differential Eqn Problem

    Homework Statement http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-003-signals-and-systems-fall-2011/assignments/MIT6_003F11_sol01.pdf http://i.imgur.com/8qj5cWE.png #6 Part B Homework Equations None[/B]The Attempt at a Solution Don't understand why we care about...
  13. J

    Purpose of CSTRs in series (Continually Stirred Tank Reactor)

    Hi, I am somewhat new to reactor design and processes, and I am wondering what exactly is the purpose of CSTRs in series. I read somewhere that "when high conversions of reactants are needed, several CSTRs in series can be used", but couldn't one also simply use a large volume CSTR if he/she...
  14. M

    Continuously draining tank (constant input\dependant output)

    Homework Statement I've been asked to solve a problem where a bathtub is being filled at a constant rate, meanwhile water is draining out continuously. The bathtub fills with a constant flow rate of \frac{dI}{dt} and drains with a flow rate \frac{dO}{dt} which is directly proportional to √h...
  15. V

    Solving Water Storage Tank Problem with Bernoulli's Equation

    Homework Statement A water storage tank is open to air on the top and has a height of 1 m. If the tank is completely full and a hole is made at the center of the wall of the tank, how fast will water exit the tank? Homework Equations Pressure is the same as atmospheric pressure because the...
  16. K

    Fuel evaporation in a tank - Pressure calculation

    Hello everybody, I have the following problem: I have a fuel tank, with a liquid phase (the fuel) and gas phase at To and P0, where T is temperature and P pressure. I assume that the gas phase at the instant t=t0 is air. (Is this assumption correct?) The temperature of the liquid phase...
  17. MexChemE

    Unsteady state mass balance -- Draining of a tank

    Homework Statement A cylindrical tank, with a diameter Db, open to the atmosphere, is drained through an orifice in the bottom of the tank with a diameter Do. The speed of the fluid flowing through the orifice is given by v = \sqrt{2gh}, where h is the height of the liquid measured from the...
  18. F

    Cylindrical tank vs conical tank

    Hey everyone, I'm new to this site and I figured this would be the best place to ask this question. We've been using maple to solve two specific problems on the time it would take two tanks to drain. One being cylindrical, and the other conical. They have the same height, the same volume...
  19. Y

    Tank of pressurized air to loosen bolts

    Car mechanics use compressed air tools to open bolts. Instead of using an air compressor one can also use a tank of pressurized air. There is an air tank with a volume of 50 L to work with. The pressure of the tank is 50 bars when it is stored indoors at 20 °C. The bolt wrench needs at least 10...
  20. A

    How Can We Calculate Accurate Temperature Drops in an Unstirred Tank?

    Hello all, I'm stuck with following problem: At our plant we have a tank filled with a liquid maintained on 80°C with a steam coil. During the night the steam is switched off and the liquid temperature start to drop. Tank mass not taken into account atm. mass liquid: 20000 kg cp liquid...
  21. Mark44

    Air rifle max velocity vs. tank pressure

    I wasn't sure if this was an engineering question or a physics question, but decided to pose it here in the general engineering section. A friend of mine, Blake, has a high-end air rifle that exhibits some puzzling behavior. The highest velocity for the pellet doesn't occur when the internal...
  22. Fernando Franco

    How to know the level of a tank by displacing the liquid

    Hi friends, I have the following problem, I know there is a system named bubbler level gauge, it works by measuring the required pressure to displace the liquid inside a tank. My known data is: the height of the tank The Diamater The Density of the liquid The Volume of the tank Let's say I...
  23. Pull and Twist

    MHB Work required to empty water out of a vertical ellipsoid tank.

    This is another problem I am having difficulty with... I set it up like I've been working the book problems, especially the sphere problems, but can't seem to get the right answer. I feel that I am calculating the radius incorrectly. I know I am supposed to us {x}^{2}+{y}^{2}={r}^{2} and r=1...
  24. J

    Double jacket tank sizing

    Hello, I am trying to design a double jacketed tank for brewing beer. Heating rate rewuired 0.5-1 C/min. Inside capacity of 300-400 liter liquid at ~1.05 d + grain, tank capacity of 600 liter. I can not find a proper calculation for a minimum jacket surface area required for this aplication. I...
  25. M

    Tank Volume: Find Volume at 3,000 psi, 80 F

    Homework Statement A tank for scuba diving is designed to contain 50 standard cubic feet of air when filled to a pressure of 3,000 pounds per square inch (gage) at an ambient temperature of 80 F. Calculate the interior volume of the tank. A standard cubic foot occupies one cubic foot at T=15...
  26. UsamaHameed

    Thermal Stress Analysis in a barrel of a T-80 tank

    Homework Statement I need to find thermal stresses that will be produced in a tank barrel as a result of firing. First of all, I want to know if theses stresses can be small enough to be neglected? And if not, then how can they be calculated? I basically know the solution but I want to be sure...
  27. M

    Find the quantity of salt in the tank?

    Homework Statement A 200 gallon tank initially contains 100 gallons of water with 20 pounds of salt. A salt solution with 1/4 pound of salt per gallon is added to the tank at 4 gal/min, and the resulting mixture is drained out at 2 gal/min. Find the quantity of salt in the tank as it's about to...
  28. M

    Find the quantity Q(t) of salt in the tank?

    Homework Statement A tank initially contains 40 gallons of pure water. A solution with 1 gram of salt per gallon of water is added to the tank at 3 gal/min, and the resulting solution dranes out at the same rate. Find the quantity Q(t) of salt in the tank at time t>0. Homework Equations None...
  29. Q

    Calculating Wavelength in a Ripple Tank: Understanding the PS1-PS2 Equation

    Homework Statement Two sources 6.0 cm apart, operating in phase, produce water waves. A student selects a point on the first nodal line and measures from it 30.0cm to a point midway between the sources and 5.0cm (on the perpendicular) to the right bisector. a) what is the wavelength Homework...
  30. K

    Pump compresses air into a tank

    Homework Statement A cylindrical pump of length 25[cm] pumps air in atmoshpheric pressure ant temp 270C into a big tank. the manometric pressure in the tank is 4[atm]. at which distance will the air start entering the tank. Homework Equations In adiabatic process...
  31. K

    Water flows from a compressed tank

    Homework Statement A tank of height 3.6[m] and closed at the top is filled with water to height 3[m], see drawing. the pressure P1 above the water is 1.055[kgf/cm2. A pipe is coming out from the bottom and the opening is 1.5[m] above the ground. what is the water's velocity out of the pipe when...
  32. N

    Caculate air flow using tank pressure

    Dear all ! I am an engineer from Vietnam! I just started to work 4 months ago. Now I got assignments with compressed air system! The compressor is not mentioned here! We have an air vessel of 500 Liters, and pressure is 7 bar. Before air vessel is an air booster with inlet pressure of 6 bar. The...
  33. S

    How to describe motion of the wall of a liquid container?

    Hi, I wonder I cannot solve the following simple problem. I really don't know what kind of equations are relevant. Imagine a rectangular tank, with vertical walls containing some water. The surface area is big. The wall of the tank is movable without friction, and its mass is negligible. All...
  34. UsamaHameed

    Thermal Stresses in the barrel of a tank

    I want to calculate the thermal stresses in the barrel of a tank. The barrel is smooth bore, auto-frettaged and chrome-platted. I want to know if the thermal stresses are small enough to be neglected and if not, then how can I find them? Relevant Equation: Thermal Stress= modulus * coefficient...
  35. C

    Bubble in water tank affects overall weight?

    Homework Statement Compare the weight in these 3 cases: http://imageshack.com/a/img913/4506/hlmnbL.png Homework Equations -- The Attempt at a Solution I think the weight is the same in three case, is it correct ? http://imageshack.com/a/img538/1879/rjJyK3.png
  36. J

    How many lbs. of water are in the tank?

    Homework Statement 2. A tank has a volume of 8000 gallons and is 50% full. If the tank contains water, which has a density of 8.33 lbs/gallon, how many lbs. of water are in the tank? Homework EquationsThe Attempt at a Solution Volume occupied is 50% i.e 4000 gallons , given that the density...
  37. J

    Will the tank be able to hold the entire load?

    Homework Statement 2. A rail car containing 8000 lbs. of a chemical whose density is 3.5 lbs/gallon is to be unloaded into a 2500 gallon capacity tank. Will the tank be able to hold the entire load? Homework EquationsThe Attempt at a Solution volume = mass/density= 8000lb/3.5=2285.71
  38. J

    What is the volume of a tank that is 8 ft in diameter and 15 ft high?

    Homework Statement What is the volume of a tank that is 8 ft in diameter and 15 feet high Homework EquationsThe Attempt at a Solution Π x (4ft) 2 x 20ft 3.14 X 24ft x 15ft = 1130.4
  39. L

    Hydr. force on a triang. tank (force one end & pumping out)

    Homework Statement [/B] You are given a triangular trough (base of triangle on top) that is 15 feet long, 2 feet wide, and 3 feet tall. a. Find the force of the water on one triangular end. b. Find the work required to pump all the water over the top. Just a note: This was question that I got...
  40. C

    Calculating time required to pressurize compressed air tank

    Hello, I searched as best I could but could not find a direct answer to my question; I've seen similar questions but without the required data to be able to make the calculation. I thought this would be a simple calculation to find but apparently not. Compressed air source is 4.46cfm @ 93psi -...
  41. Z

    Fluid Statics: Find vertical and horizontal forces in tank

    Homework Statement The tank shown in the figure is filled with water and fastened to the ground. There is a small opening on top of the semi-spherical part of the tank. a) What is the magnitude of the horizontal force on the screws? Explain using a free body diagram. b) Consider the proper...
  42. J

    Calculate the capacity of the tank

    Homework Statement Calculate the capacity of the tank.Capacity of the tank when filled to its maximum height in pounds and gallons Maximum height = Gallons: Pounds: ______ gallons*8.34 pounds/gallon*.84 = ______ pounds(note the units again)Calculate the pounds/square foot and pounds/square...
  43. D

    Find the Oxygen Mass in a Welding Tank

    Homework Statement A welder using a tank of volume 7.40×10−2m3 fills it with oxygen (with a molar mass of 32.0g/mol ) at a gauge pressure of 3.20×105Pa and temperature of 38.7∘C. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is 22.9∘C, the...
  44. L

    Fish has gone missing in a tank

    Homework Statement At the aquarium where you work, a fish has gone missing in a 8.00mdeep, 8.80m diameter cylindrical tank. You shine a flashlight in from the top edge of the tank, hoping to see if the missing fish is on the bottom. What’s the smallest angle your flashlight beam can make with...
  45. S

    Can a Square Tank with Thin Walls Withstand Pressure for Oil Collection?

    i have a pre made tank approx dimemsions 3x3x3 feet the thickness of tank walls appear to be 3/16 to 1/4 inch thick. with a 1foot square opening on top for filling this opening had a raised "wall" approx 2inches. tank is used to collect used oil for shop heating. (this tank looks like a...
  46. J

    How to design a vertical cylindrical Water tank

    I Need to design a Vertical cylindrical water tank to be build by Fiberglass. I need to calculate the tank also for 7.5 m bar pressure and 2.5 m bar vacuum pressure. Tank Dimensions to be 4m Dia, 5 m High (60000 Liters). I have Fiberglass laminate of 6 mm Thk and Modules is 1470000 psi. I have...
  47. D

    Amount of pressure at the bottom of a tank from water

    I am not sure how to calculate any of this or if i am even doing it correctly. I pulled these formulas from different sites and not sure if I applied them correctly. Or even if these were the right formulas to apply. **I also did all calculations acting as if the bladder was square and had...
  48. I

    External Work done by a tank containing air

    Homework Statement A tank containing air is stirred by a paddle wheel. The work input to the paddle wheel is 9000 kj and the heat transferred to the surroundings from the tank is 3000 kj. The external work done by the system is ? Homework Equations dU = Q-W The Attempt at a...
  49. J

    Laplace analysis of simple LC tank (no resistance)

    I am stumped by an exercise in using Laplace transforms to analyze the voltage and current in simple LC tank. My issue is with the correct sign of the voltage across the capacitor ...let me pose the problem. A circuit consists of a voltage source V, 2 switches, a cap C and an inductor L. The...
  50. U

    Pressure and Weight in Water Tank

    Hi all, Can someone clarify whether the following is right? Assume a Cylindrical tank with a base area of 2000 sq.cm, is filled with water upto 15 metres ( tank starts from ground level) 1) The pressure at the bottom of tank will be 2.5 bar ( approx) i.e 1 bar pressure for every 10...
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