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. M

    Initial velocity of air from tank

    Hi all, I am trying to work out the initial velocity of dry air, through a 3" opening in a pressurized tank (150 psi). I thought I should use Bernoulli's eq. as a start: P=1/2*rho*V^2 by changing the formula to give velocity, V = sqrt(P*2/rho) Then I realized there was no time value in...
  2. D

    Analyzing Stress in Flexible Fuel Tanks: How Can I Do It?

    Hi, I am looking for a method to analyze stress within a flexible fuel tank, akin to the one in the picture: http://image.made-in-china.com/2f0j00pBiEqWDJnVbe/Flexible-Fuel-Tank-KSD-009-.jpg So far I have not been able to find a text that would discuss something similar. Simple...
  3. S

    Tank concentration-of-chlorine problem (Dif. Eq.)

    Homework Statement A tank with a capacity of 400 L is full of a mixture of water and chlorine with a concentration of 0.05 g of chlorine/liter. The chlorine concentration is to be reduced by pumping in fresh water at the rate of 4 liters/second. The mixture is kept stirred and pumped out a...
  4. P

    The catamaran tank - an MRAP which doesn't roll over

    OK so that is the problem and there is an obvious vehicle modification to counter the roll-over problem which is to fit stabilisers, adopting the same concept employed in a child's bicycle. http://img3.imageshack.us/img3/3770/stabilisedmrap.jpg The simplest and cheapest way to do this...
  5. U

    Flow rate of a tank with RAMP at the bottom

    Flow rate of a tank with RAMP at the bottom** Homework Statement 50 m3 of water in a tank at a height of 11.5 metres. The water will be flowing out of the tank down a ramp of 30 metres. The angle of the ramp from the floor to the tank will be 22 degrees. Homework Equations v =...
  6. 4

    Differential equations capacity tank problem (chemical solutions) mixture

    Homework Statement A 300-gal capacity tank contains a solution of 200 gals of water and 50 lbs of salt. A solution containing 3 lbs of salt per gallon is allowed to flow into the tank at the rate of 4gal/min. The mixture flows from the tank at the rate of 4 gal/min. The mixture flows from the...
  7. H

    How to Dry SF6 Tank: Rules of Thumb & Models

    Hello, Now that I have an actual problem (in summer work) I thought I'd take the step from occasional forum lurking to actually post. A customer have recently had some problems with moisture in a tank of insulating SF6 gas, protecting some 300kV electronics. Allow me to outline the...
  8. T

    Revolving a tank around the y axis: Work needed to pump water

    1. A tank is formed by revolving y = 3x^2, x = [0,2] around the y-axis is filled to the 4 feet point with water (w = 62.4 lb/ft^3). Find the work necessary to pump the water out of the tank over the top. I got the integral being from a = 0 and b = 4 and integrating [(12y-y^2)/3]dy with w and...
  9. A

    Work required to pump water out of conical tank

    Homework Statement Find the work done in pumping all the water out of a conical reservoir of radius 10ft at the top and altitude 8ft if at the beginning the reservoir is filled to a depth of 5ft and the water is pumped just to the top of the reservoir. Homework Equations None The Attempt at a...
  10. S

    Shape of surface of fluid in a rotating tank

    Homework Statement A concave astronomical telescope mirror may be made by rotating a circular tank of mercury. Find an expression for the shape of the surface in terms of the density of mercury, the radius from the centre, and the rotation rate. Homework Equations v = r \omega The...
  11. W

    Heat element, atomization, portable, melt tank

    Hello, Can anyone help me? I want to pay a material/chemical enigneer to create a portable, commercial ( less industrial than what is on the market today), hot melt spray system. I know it sounds weird but I really need some advice on which company to call that will either tell me...
  12. R

    Energy in scuba tank moving a car?

    I've watched the videos and read a lot of posts on here about compressed air storage. I read that a filled scuba tank has over a million joules? I'm trying to visualize what happens if you suddenly release all the energy from that tank, it should be enough to move or brake/stop a sizable...
  13. P

    Solve Time for Tank Filling with 2 Pipes

    Homework Statement "A tank can be filled in 6 hours using 2 pipes. The larger pipe alone would fill it 5 hours sooner than the smaller pipe alone. How long would each pipe alone take?" Homework Equations I know it involves a quadratic not sure on the rest... I can't see how to do...
  14. H

    Great Turkish Bombard vs. a tank

    OK so maybe this is kind of a dumb question, but my curiosity has been killing me so I thought I'd post this here and see if someone with expertise in physics can help me. I'm a history buff, and a friend of mine mentioned a story he heard about a Napoleonic War-era cannon being pulled out of...
  15. N

    Volume of water discharged from a tank

    Homework Statement A rectangular opening is cut into the side of a large open-topped water tank. The opening has width w and height h2-h1, where h1 and h2 are distances of the opening below the water surface as identified in the figure. Determine the volume V of water that emerges from the...
  16. W

    Where to buy pressure and temperature tank gauges?

    Hey guys, I was wondering if anyone knew where I could buy tank gauges that read both the pressure and temperature inside the tank. They can be digital, in fact if it is cheap enough it would be preferred. Does anybody have any ideas? Northern Tool at least the one here didn't, Lowe's didn't...
  17. M

    Number of balloons filled from a tank of helium

    Homework Statement How many 3L balloons can you fill from a 20L tank of helium at a pressure of 14.4atm. Homework Equations Boyle's Law: P_{1}V_{1}=P_{2}V_{2} The Attempt at a Solution \frac{14.4atm\times20L}{1atm}=V_{2} I then divided the answer to thank by 3 to get the amount...
  18. C

    Water flowing from an open tank

    Homework Statement Water flows steadily from an open tank. 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 at point 2 is 0.0480 m^2 ; at point 3 it is 0.0160 m^2 . The area of the tank is very large compared with the cross-sectional...
  19. A

    Calculating Temp Difference in a hot water tank

    I want to calculate the difference in temp between the bottom & top of a hot water tank, Presumably the height of the tank, the diameter, the actual temp and time would be the variables. I will assume no heat loss. The heat input would be at the base of the tank.
  20. G

    Unsteady state problem - draining from a tank

    Homework Statement The flowrate leaving the tank is regulated by a partially open valve, You may assume that the pressure drop in the exit pipe system is across the valve itself. The cross sectional area is 1m2. At steady state, the water level inside the tank is measured to be 1m...
  21. I

    Fluid mechanics question on forces on a cone in a pressurized tank

    A plug in the bottom of the pressurized tank is conical in shape. The air pressure is 40kPa and the tank has a specific weight of 27kN/m^3. Determine the magnitude, direction, and line of action of the force exerted on the curved surface of the cone within the take due to the 40kpa pressure and...
  22. G

    Acoustic test for the sloshing noise in a tank

    I am currently doing an acoustic experiment, testing the sloshing noise made by the fluid content in a tank. My software and microphone gives me all the outputs from the sloshing noise but not the loudness calculation. I am needing a figure for every test to key into my statistical software and...
  23. M

    Two identical taps fill 2/5 of a tank in 20 minutes

    So a particularly dumb client has decided that before I can work for them I have to pass a high school maths test. Never having had to do US school tests I looked at some practice questions, including: "Two identical taps fill 2/5 of a tank in 20 minutes. When one of the taps goes dry in how...
  24. R

    Decanting one tank into another

    Goodday . i wonder if anyone can help with this . I looking for the formula to the below problem inorder to use same to transpose in case i shoild need the pipe size in another case Two tanks , tank A and tank B. How much time in hours to fill tank B. Where Tank A is a full water tank(...
  25. H

    Finding the Rate of Water Input in a Leaking Conical Tank

    Homework Statement Water is leaking out an inverted conical tank at the rate of 50L/min. The tank has a diameter of 10m at the top and is 6m deep. if the water is rising at the rate of 4cm/min when the greatest depth is 3m, find the rate at which the water is being poured into the tank...
  26. B

    Compressed Hydrogen tank mass estimation

    Does anyone know how to calculate the mass of compressed hydrogen tank at certain pressure. The tank is cylindrical with hemispherical ends. I have pressure,radius,wall thickness and length,internal volume and density of the material. The tank is a Type IV tank.(Composite tank with...
  27. W

    Calculating pressure acting on sides of tank

    Homework Statement Tank is 10m x 1m x 1m Tank is full of water. What is the maximum pressure acting on the Tank? What is the maximum force acting on the sides of the tank which could cause bending of the tank? Homework Equations Pressure = l*g*h where P = water pressure (hydrostatic) l =...
  28. S

    Related rates, conic tank

    Homework Statement Water si emptying out of a tank at a rate of 4 cubic metres/min. The tank is shaped like an inverted circular cone with a diameter of 8 m at the top. The sides of the cone make a 30 degree with the vertical. Determine the exact value of the rate of change of the water level...
  29. A

    Water pressure in a tank problem

    Homework Statement A water pipe feeds a water tower with water. The tower is 15 metres tall. If the water is to flow into the tank what is the minimum pressure of water at the bottom of the tower? Assume litre of water = 1 kg Assume 1 BAR = 1kg cm-2 Homework Equations P = p g h ? The...
  30. M

    Volume of liquid in a tank using a double integral

    Homework Statement The fluid level in the tank ((1/4)*(x-4)^2 + y^2 == 4) is 7 m on the left edge of the tank (where x=0) and 5 m on the right edge (where x=8). Find the equation of the plane of the liquid, and use a double integral to find the volume of liquid in the tank. [Hint: you should...
  31. P

    Work Required to Empty a Hemispherical Tank

    Homework Statement Find the work required to empty a tank in the shape of a hemisphere of radius R meters through an outlet at the top of the tank. The density of water is p kg/m^{3}; the acceleration of a free falling body is g. (Ignore the length of the outlet at the top.) The attempt...
  32. S

    Water Tank Design: Pressure Calculation

    Hello, everyone. I am trying to calculate the pressure acting at the vertical wall of a cylinder water tank. I am wondering whether the presure acting on the wall is as follow: Pressure = Density * gravity * height where height is from the water surface to the calculation point...
  33. B

    Wavelengths in a ripple tank experiment

    In a ripple tank experiment, students generate water waves at a speed of 4.0 cm/s and a wavelength of 0.5 cm. If the waves are refracted into shallower water where their speed decreases to 3.0 cm/s, what is their new wavelength? What would the formula be for this question?
  34. B

    Calculate the work to pump water out of tank

    An aquarium 2 m long, 1 m wide, and 1 m deep is full of water. Find the work needed to pump half the water out of the aquarium. (The density of water, p, is 1000 kg/m3, and acceleration due to gravity, g, is 9.8 m/s2.) So in order to truly understand how to do these kind of problems I decided...
  35. P

    Separator tank pumps out the liquid so as to keep the tank level

    Hello I have a question please i am not sure about. I work with this machine as a operator but would like to learn more. 1. I have attached a picture of a juice separator tank. The juice enters the separator where the liquid goes to the bottom of the tank and the vapour rises to the top...
  36. S

    Differential Equations Tank problem

    Homework Statement The problem states that at time 0 the tank has 10 lb of salt dissolved in 100 gallons of water. The capacity is 200. Assume that water containing 1/8 lb of salt per gallon is entering the tank at a rate of 2 gal/min and the mizture is draining from the tank at a rate of 1...
  37. C

    Projectile motion, water cannon into storage tank

    Homework Statement A water hose is used to fill a large cylindrical storage tank of diameter D and height 2D. The hose shoots water at 45 degrees above the horizontal from the same level as the base of the tank and is at a distance 6D away. For what range of launch speeds will the water enter...
  38. T

    Pressure of water from a hose, filling a tank from the bottom

    Homework Statement I just need a concept explained, then I can figure out the numbers. A tank with depth h is being filled through a hole from the bottom. The velocity of the water from the hose is known as well as the size hole. Pressure at the top of the water column is atm. What is the...
  39. M

    Constant Head Tank: Calculating Net Head, Flow Rate & Pressure

    Hi all, I got the system (attached below) and I am trying to work out the following (at point x-outflow): -net head of the system (I guess this isn't really at point x) -flow rate -pressure I know the flowrate and pressure at point Y, I also know how high the water in the tank is at...
  40. D

    How to measure water level in a tank?

    how to measure water level in a tank?? How to measure water level in tank in the cheapest way? The first thing that came to my mind is pressure sensor... but it's ruled out because it's expensive. Can somebody suggest a cheaper mechanism? And it is preferred to have a low power mechanism...
  41. D

    Measuring water level in tank.?

    Measuring water level in tank...?? How to measure water level in tank in the cheapest way? The first thing that came to my mind is pressure sensor... but it's ruled out because it's expensive. Can somebody suggest a cheaper mechanism? And it is preferred to have a low power mechanism...
  42. P

    Water Flow Rate from a Tank: Geometry or Level?

    Hello guys, I want to know whether the water flow rate from a tank depends on the geometrical shape of the tank (for instance sperical, rectangular, cylindrical) etc or it just depends on the water level in the tank. Thanx.
  43. J

    Snell's Law Question: Fish in a Fish Tank

    Homework Statement A fish in a flat-sided aquarium sees a can of fish food on the counter. To the fish's eye, the can looks to be 49 cm outside the aquarium. What is the actual distance between the can and the aquarium? (You can ignore the thin glass wall of the aquarium.) Homework...
  44. O

    Final Pressure & Liquid Boiled Away in a Steel Tank

    Homework Statement A steel tank with a volume of 5 m^3 contains saturated R-134a at 10 Celcius. The liquid is then boiled away and disappears at 50 Celcius. What is the final pressure? How much liquid was boiled away? Homework Equations PV=nRT The Attempt at a Solution I pretty...
  45. M

    Calculating Water Drainage Rate in a Tank Using Torricelli's Law

    Homework Statement If a tank holds 5,000 gallons of water which drains from the bottom of the tank in 40 minutes, then Torricelli's Law gives the volume V of water reminaing in the tank after t minutes as V = 5000(1 - t / 40)2, 0 <= t <= 40. The rate at which water is draining from...
  46. S

    How Does Water Pressure Relate to Tank Height and Pipe Elevation?

    Homework Statement 1) The water level in a large tank supplying a small town is 37m high. Water is pumped up for storage in the evenings and allowed to free-fall down as needed during the day. The street-level water pressure is... 2) How high should a vertical pipe filled with water be if a...
  47. D

    Pressure in cylindrical tank

    the cylinder in the picture below has a maximum shear strength of 90Mpa and a maximum normal strength of 150Mpa the tank has a wire tightly wrapped around it so that the wire has a tensile stress of 250Mpa when the tank is empty, what is the stress the tank feels due to the wire...
  48. G

    Components of Fuel System for Single Cylinder Engine w/o Carb & Above Tank

    Hi, i am interested to know the major components of the fuel system of a car. I know, these are the major ones: Fuel Tank, Fuel Pump, Fuel Filter, Injector Valve, Return Lines but what i am interested is in the fuel system for (1) a single cylinder engine, (2) no carburetor (instead, i am...
  49. D

    How do i figure out the hydtostatic pressure in the tank

    an unpressurised cylyndrical storage tank has a thin wall of 5mm thickness and is made of steel with a maximum strength of 400Mpa in tension the tank radius is 3.75m the tanks height is 20m (the tank is standing on its base like a tower) Determine the maximum height it may be filled with water...
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