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. D

    How bad do we need a pressurized fuel tank?

    Imagine a fuel tank that can store fuel at pressure (it can store at pretty high pressure also) without having any component which provides it constant energy e.g. a pump (i.e energy has been previously fed into the system so as to maintain the pressure in the tank regardless of it's fuel...
  2. M

    Calculating heat loss from open tank

    I have a large circular tank made of concrete that has a volume of 9,300,000 litres. The diameter of the tank is 48.7 meters. The side wall of the tank has a height of 4.57 meters. The tank is set into the ground by 3.57 meters and 1 meter of the tank protrudes from the ground. The tanks'...
  3. A

    Can it be possible to take well water by using a vaccume tank

    can it is possible to build or make a water pump like this http://forums.about.com/n/docs/docDownload.aspx?webtag=ab-physics&guid=435b1342-00eb-4166-a03b-97355a063e9c pls help me on this...... can anyone give me a better drawing of this with meausrments. my email is...
  4. M

    Heat exchanger in abandon oil tank

    Here in the NW most homes are or were heated by oil. The biggest cost of switching to gas (as geothermal is very expensive) is decommissioning the old buried oil tank, in many cases up to 675 gal. cap. I was pondering weather the old tank could be filled with a solution and somehow figure out...
  5. L

    Thickness or Ga. of Stainless steel water tank?

    How do you calculate the thickness or gauge of a given metal (304 Stainless Steel for example) for a 36" dia. round, vertical cylinder water holding tank? If filled say the tank would be 25-30 feet tall. No physical pressure (pumps or vacuum) on this vessel (vented to atmosphere). Flat...
  6. L

    Cylindrical tank w/ water flowing out of small tube near bottom

    1. A cylindrical open tank needs cleaning. The tank is filled with water to a height meter, so you decide to empty it by letting the water flow steadily from an opening at the side of the tank, located near the bottom. The cross-sectional area of the tank is square meters, while that of the...
  7. J

    If a cylindrical tank of radius 1m rests on a platform 5m above the

    If a cylindrical tank of radius 1m rests on a platform 5m above the ground. Initially the tank is filled with water up to a height 5m. A plug whose area is 10-4m2 removed from an orifice on the side of the tank at the bottom.(density of water = 103kg/m3, g= 10m/s2). i wanted to ask what would...
  8. W

    Force required to produce wave in tank

    Homework Statement I am building a tank to produce waves. I have two options to power the flap that will be produced to create the waves: 1. Pneumatic system 2. Motor and Cam system Before I can order motors or pneumatic air cylinders I need to know what force will be required to move...
  9. M

    Question Regarding Bubble in Kerosene Tank

    [b]1. The problem. Okay, here's the question: 'An air bubble situated at the bottom of an open kerosene tank rises to the top surface. It is observed that at the top, the volume of the bubble is thrice it's initial volume. If the atmospheric pressure is 72cm of Hg, and mercury is 17 times...
  10. V

    Calculating Force on a Tank Hatch in Water

    Force of a Tank Hatch in terms of Pressure Homework Statement The tank shown in the figure below is filled with water to a depth of H1 = 1.88 m. http://educog.com/res/brookscole/serway/Physics_for_Scientists_and_Engineers_6ed/Chap14/graphics/serb1514.gif At the bottom of one of the side...
  11. T

    Brine Tank Optimization Problem

    Homework Statement A tank is initially filled with 1000 litres of brine, containing 0.15 kg of salt per litre. Fresh brine containing 0.25 kg of salt per litre runs into the tank at the rate of 4 litres per second, and the mixture (kept uniform by stirring) runs out at the same rate. Show...
  12. fluidistic

    Velocity of a liquid leaving a tank with an angle

    Homework Statement A closed tank contains a liquid of density \rho and a gas (over the liquid) at a pressure P. Suppose there's a little hole (much smaller than the cross section of the tank so that when the liquid flows by the hole, the height of the liquid doesn't change with time) in the...
  13. E

    Could a tank or land vehicle be nuclear powered?

    Submarines are nuclear powered. How small of a nuclear-fission powered unit be made and could it be fitted inside a tank or other land vehicles?
  14. T

    Comparing Agitator Tank Types - Dish, Flat, and Cone

    Hi All, I have a question about the agitator tank. What is the different between dish-bottom, flat-bottom and cone-bottom tank? Regards.
  15. R

    Sugar water tank problem (again)

    Thank you for any help that you can give me. I am very bad at differential equations and this one is really stumping me. Homework Statement A tank contains 2740 L of pure water. A solution that contains 0.05 kg of sugar per liter enters a tank at the rate 3 L/min The solution is mixed and...
  16. U

    Effect of Faucet Location on Water Discharge from a Tank

    Homework Statement This is more of a question: In class, we solved an example with water leaving a tank from a faucet on the side and near the bottom. The result was v=(2gz)^(1/2)... the Torricelli equation. What I am wondering is if the solution would change if the faucet were located at...
  17. G

    Is there a strategy for combining the German tank and secretary problem?

    Is it possible to give a strategy for the combined problem of http://en.wikipedia.org/wiki/German_tank_problem and http://en.wikipedia.org/wiki/Secretary_problem So I'm observing tanks with serial numbers and I'm allowed only the keep the last one. I also don't know how many there are in...
  18. W

    Scaling a Wave Tank: Dimensional Analysis for Design and Construction

    I am doing a project to build a scaled wave tank. "This project involves the design, construction and testing of a wave tank. When studying the hydrodynamics of a scale model or prototype, it is important to choose an appropriate scale. To determine tank and wave dimensions it is necessary to...
  19. W

    Wave tank problem: Dimensional Analysis

    Homework Statement I am doing a project to build a scaled wave tank. "This project involves the design, construction and testing of a wave tank. When studying the hydrodynamics of a scale model or prototype, it is important to choose an appropriate scale. To determine tank and wave dimensions...
  20. T

    Calculating Oxygen Mass and Leak in a Tank Using Ideal Gas Law

    Homework Statement A welder fills a tank, volume 7.60 x 10^-2 m^3, with oxgyen (32.0 g/mol) at gauge pressure 3.25 x 10^5 Pa and temp. 36.0 degrees C. The tank has a small leak, and some of the oxygen leaks. When temp. is 22.4 degrees C, pressure of oxygen in tank is 1.80 x 10^5 Pa. Find...
  21. S

    Salt Concentration in 4000L Tank: Find the Limit

    A tank contains 4000L of pure water. Brine that contains 30g of salt per liter of water is pumped into the tank at a rate of 25L/min. Show that the concentration of salt after t minutes (in grams per liter) is C(t) = 30t/160+t What happens to the concentration as t --> infinity lim C(t)=...
  22. K

    Solve Height of Water in Cubical Tank

    Homework Statement Suppose water is leaking from a tank through a circular hole of area Ah at its bottom. When water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cA_{h}\sqrt{2gh}, where c (0 < c < 1) is a...
  23. T

    Thermo: A Flat Tire and a Pressurized Tank

    Homework Statement We have a tank of air at 7 atm, 30 L, and 293 Kelvin(20 Celsius), and a flat tire with 1atm, 10 L (Constant), also at 293 K (20 C). The valve is opened quickly and closed quickly when the pressure in the tank reaches 6 atm. Using the Ideal gas assumption and taking the...
  24. Shackleford

    Solving #12: Salt Content in Tank B

    This is probably the longest problem I've ever had. #12. Check my work, please. I'm a bit leery of the solution to the salt content, y(t), for Tank B simply because it seems quite complicated. The first part wasn't too bad, though...
  25. F

    Impedance of voltage source, and tank ckt

    Can someone please tell me whether the following statements are wrong or right? this is not homework: 1. Voltage sources, like batteries, have a low impedance (ideally zero) 2. A good car battery's impedance (even with alternating current going through the battery) is typically far less than a...
  26. R

    Closed tank and inverted manometer question

    Hey guy this is my first post here. I am looking for a little bit of help with a past paper I've been looking over. I've had a look at it and I am drawing a blank due to being off ill when this was covered in class, if anyone would be so kind as to show me how to get started on this question I...
  27. S

    Heat loss from an insulated water tank - Thermodynamics

    Heat loss from an insulated water tank ----- Thermodynamics Hi and thanks in advance for any help with this problem. If I have a very very well insulated tank of water of say 4 litres. If we could assume that the tank had no heat loss... The tank is heated by an electrical device that...
  28. Q

    Revolutionize Renewable Energy with the Innovative Alternative Energy Tank

    Here is an invention I'd like to share with anyone who has the money to develop and market it. Furthermore, I don't even have the technical skill to determine if it's viable on paper so I suppose it's reasonable to say that anyone who pursues this is entitled not to share anything with me...
  29. D

    Scope of low altitude tank with high pressure simulation.

    Suppose a company has developed a modification for almost all types of tanks such that when the tank is filled with an incoming fluid (which is at a certain pressure), it stores this pressure and uses it to take the fluid out of the tank with pressure, i.e even if the tank is at low altitude it...
  30. S

    Solving a CO2 Air Tank Problem

    ok so it has been a few years since I have worked on things like this and I am needing some help I have a CO2 tank that weighs 22.17 oz's when full. There is 9 oz's of CO2 in the tank. The problem I am working on is that I need to find out how far the tank will go when the safety burst...
  31. I

    Troubleshooting a Tank Circuit for 60Hz Frequency Matching

    I have built a parallel LC resonator to tune into a specific frequency. the frequency I am tuning into is 60Hz. The problem I am having is that I matched the value of the inductor and the value of the capacitor to match at that frequency within certain tolerance, And the is no signal being...
  32. N

    Analyzing Gas Tank Filling Rates: Solving a Differential Equation

    Hi all, I hope this is right place to post this question (this is not a homework question). I wanted to find out in what time a tank under low pressure (gas/air) is filled by the atmospheric pressure through a restriction. (Tankpressure in relation of time or Flowrate through the...
  33. B

    Tank and a hole in it whats the speed?

    tank and a hole in it what's the speed?? Homework Statement A careless worker at a refinery accidentally punches a hole in a gasoline tank 47.4 m below the surface of the gasoline. The tank had been sealed under 3.07 atm of absolute pressure and the density of the liquid is 659 kg/m3.If the...
  34. T

    Finding the Height of a Water Tank

    Homework Statement A tank of height h full of water with it's base 40 meters from the ground, with a hole on the lateral wall at the base. The water comes out of the tank at 6.93 m/s to fill a pool on the ground. The water hits the center of the pool at a distance of 19.5 meters measured...
  35. A

    Calculating the force provided by an opened compressed air tank

    Hey. Quick question. If we have a compressed air tank of 550 kPa with a opening area of 0.25 cm^2, would the force provided just be P*A so it'd just be 550 * 0.25 (with appropriate conversions to metres and pascals etc). We are looking for the force that'd be provided to a model car that the...
  36. H

    Help with Calculus: Maximising Volume of Hot Metal Storage Tank

    help Calculus! Homework Statement got this question, and i need help. lost it lol. this is the sort of question i have to do for me assignment. Help in going through it Homework Equations Hot metal storage tank: is rectangle with a square cross section total surface area is...
  37. L

    How will chlorine affect an underground concrete water holding tank?

    I wish to build an underground water holding tank. It will be 12’ wide by 12’ long by 10’ high. It will be constructed out of reinforced concrete. My figures show the box to be 1440 cubic feet, 10,771.2 gallons, and 89,827 Lbs. or 44.91 tons. The container will be buried in the ground...
  38. N

    Water flow from Tank B to Tank C sizing questions

    Brief description: I have a three tank system (A,B,C). Tank A is fitted with stand pipes with the over flow flowing down and then up through the bottom of a 1" bulkhead fitting and into Tank B. Tank B is approx. 12' x 2' x 12". At the end of Tank B is another 1" bulkhead fitting with the exit...
  39. K

    Empty a gel from one tank to another tank (closed system)

    Homework Statement We have a tank with some gel and it will be emptied into another empty tank. The air in the first tank wil stay in the first tank. The air in the second tank will stay in the second tank. What is the equilibrium height of the solution inside the tank. also, see Excel...
  40. A

    Empty Conical Tank: Use Torricelli's Principle to Find Time

    Homework Statement Use Torricelli's principle to find the time it takes to empty a conical tank of circular cross section standing on its apex whose angle is 45° and has an outlet of cross sectional area 1.0cm². The tank is initially full of water and at time t = 0 the outlet is opened and...
  41. A

    How Does Water Flow Dynamics Work in a Tank System?

    Homework Statement Link to picture: http://session.masteringphysics.com/problemAsset/1011222/12/yf_Figure_14_41.jpg Water flows steadily from an open tank as shown in the figure. The elevation of point 1 is 10.0 m, and the elevation of points 2 and 3 is 2.00 m. The cross-sectional area...
  42. A

    What is the pressure on face B of an L-shaped tank filled with water?

    HELP! L-shaped tank problem! Homework Statement 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?Homework Equations F=PA P=pgh The Attempt at a Solution...
  43. N

    Water Tank Modeling: Find Time Intervals and Greatest Amount

    Homework Statement The amount of water in a storage tank, in gallons, is modeled by a continuous function on the time interval 0<=t<=7, where t is measured in hours. In this model, rates are give as: (i)The rate at which water enters the tank is f(t)=100t^2*sin(sqrt(t)) (ii) The rate at...
  44. W

    How can waves in a water storage tank be prevented?

    Hi, I need to find a solution to the following problem: A 45000 bbls water storage tank has a 24" water inlet, the water that enters the tank is causing a lot of waves. These waves are causing damage to an oil skimmer float located in the surface of the water. Our client wants to find a...
  45. I

    Optimizing a Parallel LC Tank Circuit: Ground and Output Connection Placement

    I'm building a tank circuit and I need to have an output and a ground connection. The type of circuit is a parallel LC tuned circuit. I just don't know where the connections should be placed. Does it matter for the circuit to operate properly. If someone can give me an answer to this or tell me...
  46. E

    Oxygen Tank: Question about gas laws

    Homework Statement A cylinder of compressed Oxygen is carried on a spacecraft headed for Mars. The compressed gas cylinder has a volume of 17000 L and is filled to a pressure of 248 atm at 231 K. The maximum pressure the cylinder can hold is 1000 atm.The contents of the cylinder are then...
  47. S

    (Thermo) Tank of N is heated, valve opened, find time duration

    Homework Statement A nitrogen gas-liquid mixture is in a 20 cubic foot tank at a condition of 161 R with an initial quality of 0.1. Heating occurs at a rate of 10,000 Btu/h until the pressure reaches 100 psia. At this condition the BHE safety valve opens and maintains a constant pressure as...
  48. B

    Find Work to Pump Water from an Inverted Cone Tank

    Homework Statement A tank is in the shape of an inverted right circular cone with a radius of 10 feet and a height of 6 feet. Assume the tank contains water to a depth of 4 feet. Find the work required to pump all but 1 foot of water from the tank. Homework Equations W=\int^{b}_{a}Fdx...
  49. P

    Find the rate at which water is draining from the tank after the following times.

    Homework Statement If a tank holds 3500 gallons of water, which drains from the bottom of the tank in 50 minutes, then Toricelli's Law gives the volume V of water remaining in the tank after t minutes as the following. V = 3500 (1-t/50)^2 0 </=t<=50 Find the rate at which water is...
  50. P

    Artillery recoil for a 76mm tank gun

    this isn't a homework problem - and i am not a student! i have a 76mm tank gun (it's legal and registered w/ the feds in case you are wondering) and i am interested in firing blanks - but here is the problem: i want the gun to recoil like it does when firing live rounds. here is how the...
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