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. S

    Solving a Differential Equation: Salt Concentration in a Tank

    can you help me ?? A 200 liter tank initially contains 100 liters of water with a salt concentration of 0.1 grams per liter. Water with a salt concentration of 0.5 grams per liter flows into the tank at a rate of 20 liters per minute. Assume that the fluid is mixed instantaneously and that...
  2. S

    Solving Differential Equations for Tank of Water and Salt

    can you help me ?? A 200 liter tank initially contains 100 liters of water with a salt concentration of 0.1 grams per liter. Water with a salt concentration of 0.5 grams per liter flows into the tank at a rate of 20 liters per minute. Assume that the fluid is mixed instantaneously and that...
  3. C

    Thermal expansion of tank and contents.

    Homework Statement At 5°c, a steel tank is 6m high, 9m in diameter, and contains oil to the 5.9m level. A heating coil is put into service, causing 3.4m^3 of oil to spill over the top of the tank by the time the final temperature is reached. Calculate the final temperature, if the coefficient...
  4. C

    How fast will the pressure decrease from a leaking gas tank?

    Hi! At my plant we have a tank filled with hydrogen gas used for cooling a generator. The tank volume is 360 m^3. We have a constant leakage of 1 m^3/h. The system pressure is about 0,4 MPa. We also have a constant inflow to the system and the ventilation in the room is good so the leakage is...
  5. S

    Water Pressure in tank filled with water

    Figure 14-24 shows a tank filled with water. Five horizontal floors and ceilings are indicated; all have the same area and are located at distances L, 2L, or 3L below the top of the tank. Rank them according to the force on them due to the water, greatest first. Are we just comparing the...
  6. S

    Syphon problem with above ground water tank

    I have a problem with an above-ground water tank supplying a pump on the ground, supplying a sprinkler system. When the pump turns off, the water doesn't stop due to the syphon effect. When I first installed the pump, I put in an adjustable sprink check valve after the pump, but it still leaked...
  7. J

    Work done by pumping water into a tank

    Homework Statement Problem with picture attached I need help on 24. **24 is a continuation of 23 so use the same dimension except for the distance... Or you can go here http://college.cengage.com/mathematics/blackboard/content/larson/calc8e/calc8e_solution_main.html?CH=00&SECT=a&TYPE=se...
  8. QuarkCharmer

    Fluid Dynamics of saltwater in sealed tank

    Homework Statement A sealed tank containing seawater to a height of 12.8 m also contains air above the water at a gauge pressure of 2.90 atm. Water flows out from the bottom through a small hole. How fast is this water moving? Homework Equations I believe that Bernoulli's equation is...
  9. E

    Calculating Water Height for Pipeline from Tank A to B

    I am designing a water pipeline from tank A to tank B. assuming tank B is empty, how can i calculate the water height going out from the pipe?
  10. Z

    How ti increase R22 gas pressure in the tank?

    dear guys, first of all.., I'm sorry because i not sure my question suitable in this forum or not. if not, mr moderator please move my topics to correct section :redface: my problem is, how to increase the pressure of the r22 gas in the tank diameter 10 inch x 30 inc (length). my tank can...
  11. T

    A centrifugal pump at the source tank sends fluid 200m

    Hi, This is a question regarding my employment. A centrifugal pump at the source tank sends fluid 200m using 3" hoses to a recieval tank. When the automatic valve shuts on the recieval tank the pump stops due to it having a pressure sensor.When the pump stops there is 8 Bar pressure on...
  12. M

    Augustine in septic tank (Alice in Wonderland)

    Homework Statement Flopping about in pain, Augustine starts rolling across the beach at a constant 1.4m/s. This isn’t Augustine’s day as he now rolls into a hole somebody had just dug for a new septic tank. If it takes him 1.01s to hit the bottom of the hole: a)How deep is the hole? b)what...
  13. P

    Time for liquid ejecting from a hole in tank to reach ground

    Hi all, I was trying to find the time required for liquid ejecting from a hole in a tank to reach ground level. The equation given in one of the books is as follows: t = √(2h/g) or sqrt of (2h/g). where h stands for the height of hole in tank shell from the ground level. This...
  14. D

    1 litre tank water sealed does steam pressure rise linear or exponential?

    hi, if you had a litre container full of water with negligible air and nothing else and heated it at a linear rate from 50 degrees centigrade upto 200 degrees centigrade does the steam pressure rise linearly or exponentially? the measurements are plucked from the air, its the rate of steam...
  15. J

    Work required to pump water out of a conical tank

    Homework Statement Find the work required to empty a 10m high conical tank with a radius at the top of 4m by pumping the water out the top of the tank. The water level is 2m below the top of the tank. Homework Equations \pi r^2 Similar triangles The Attempt at a Solution...
  16. Y

    Controlling the flow from a draining tank

    Homework Statement Torricelli’s law says that if you drain a tank like the one in the figure shown, the rate y at which water runs out is a constant times the square root of the water’s depth x. The constant depends on the size and shape of the exit valve...
  17. F

    Question: What is the maximum flow rate delivered to the second tank?

    Problem Statement: A water tank (Diameter=10m) is pressurized with a gas at 20MPa. 15m below the surface of the water in the tank, is an exit pipe (Diameter=0.4m, area=A2) to a second pressurized tank of 16MPa. What is the maximum flow rate delivered to the second tank? I'm not sure what I'm...
  18. B

    Related Rates in a Water Tank: Finding the Rate of Change of Water Depth

    Homework Statement A water tank has the shape of an inverted right-circular cone, with radius at the top 15 meters and depth 12 meters. Water is flowing into the tank at rate of 2 cublic meters per minute. How fast is the depth of water in the tank increasing at the instant when the depth is 8...
  19. S

    Calculating the flow rate of water from a tap and on the surface of a water tank

    I am really not sure how to go about this problem, can anybody please give me an indication on how I can start solving the problem? Homework Statement An open rectangular water tank 1.2 m x 1.2 m x 2.6 m (height) is completely filled with water. As the tap at the bottom is opened, the flow...
  20. D

    Calculate Kinematic Viscosity for Stirred Tank System

    Homework Statement The liquid in a production stirred tank system in which vortexing occurs has viscosity equal to 0.005 Pas and density equal to 900 kg m^3. A 1/5th scale laboratory model of the production unit is built to investigate the mixing performance. The liquid used in the laboratory...
  21. F

    Modeling air temperature and pressure in an open system (decompressing tank)

    I am trying to determine how to accurately model an open system which includes: A tank: Volume = 1320 gallons An exit pipe from tank: Diameter = 3 inches The tank is compressed from atmospheric conditions to a final pressure of 100 psig. Then the tank is allowed to decompress by opening a...
  22. F

    Ideal Gas - tank sprung a leak

    Homework Statement A tank with a fixed volume of 0.0800 m3 is filled with an ideal gas at a pressure of 4.00 atmospheres and a temperature of 48.0° C. Due to a small leak, some of the gas leaks out. Later it is found that the pressure in the tank is 3.20 atmospheres when the temperature is...
  23. H

    Series capacitance added to parallel resonant tank changing the resonant freq?

    HI all, A parallel tank circuit at resonance has a theoretical infinite impedance. However due to the resistance of L and C some power is dissipated so a small current will flow from the source. If a parallel tank circuit is oscillated at it's resonant frequency and a capacitor (C2) is...
  24. T

    Fuel pressure change in closed fuel tank

    Hi, I am measuring pressure at the bottom of a fuel tank and temp variations are giving me a tough time. I wish to clear my head so here goes my reasoning as temp increases - Tank Volume increases causing - height of fuel to decrease, pressure at the bottom of tank to decrease - Fuel...
  25. P

    Does Pipe Size Affect Water Level Equilibrium in Tanks?

    Hi Can someone please confirm me on this one http://img822.imageshack.us/img822/9724/hydron.png 1. Is this picture correct? (The water level in the big tank and in the pipe will be the same) 2. Water level in big tank and pipe would be the same regardless of pipe size (red) Thanks
  26. T

    Engineering Phase shift in LC tank circuit

    In a lab session we were investigating the LC tank circuit of a superhet radio. The tank consisted of a ferrite coil antenna connected in parallel with a variable capacitor. A signal generator was connected to a second ferrite antenna (the drive antenna) and placed close to the first in order to...
  27. M

    Pressure on a lateral side of a tank

    Hello there,Could you explain to me how to calculate the pressure on the lateral sides of a tank? [PLAIN]http://desmond.imageshack.us/Himg42/scaled.php?server=42&filename=unleddrw.jpg&res=medium according to the textbook P=L/2(ρg) but I don't understand where this relation has come from...
  28. M

    Question: Draining Tank problem

    A cylidrical tank (R= tank radius) filled with a liquid with an opening for the insertion of pressurized gas on top and an exit hole on bottom (r=exit hole radius). Plot the Height of the liquid as a function of time and exit radius. Gas pressure=const. No swirl (1D analysis) Any...
  29. B

    Most effective Surge Tank location

    Homework Statement In the figure, where would be the most effective location to place the water hammer amestor (surge tank)? -Location A -Location B -Location C -Anywhere would be fine -Do not care -A combination of the above answers. Homework Equations N/A The Attempt at a Solution I...
  30. P

    Calculations of heat transfer in a tank system

    Hi guys This is my first post here. I studied physics about 15 years ago and some weeks ago I realized that I'd forgotten most of it. So these days I'm playing around with physics just for the fun of it. So, I got to the subject of heat transfer, and though I would like to learn some more...
  31. H

    Work necessary to pump gasoline from a tank

    Homework Statement Suppose a large gasoline tank has the shape of a half cylinder 8 feet in diameter and 10 feet long. If the tank is full find the work (W) necessary to pump all the gasoline to the top of ht tank. Assume gasoline wights 42 pounds per cubic foot. Homework Equations W=...
  32. T

    Easy Tank Model? Outflow of tank proportional to volume of tank.

    1. Suppose we have a tank partially fi lled with water. There is a pipe feeding water to the tank as a variable ow rate and there is also a drain pipe with a computer controlled variable valve hooked to a sensor in the tank. The valve opens exactly enough to let water drain from the tank...
  33. P

    Work pumping oil out of partially filled horizontal tank

    Homework Statement "Oil weighing 9000N/m3 is to be pumped out of the top of a horizontal cylindrical tank of radius 5m and length 15m. Set up an integral to find the work required to pump out the oil to the top of the tank if the depth of the oil is 4m." Homework Equations I used y =...
  34. R

    Hydrogeology - setting up ODE for tank problem

    Hi there. I have trouble setting up an ODE for a hydrogeologi problem. I have attached the problem and my answers as pdf as they contain diagrams and graphs to help describe the problem. Hope that someone can/will help me. :-) Thank you. -Rasmus1. The problem is attached in Eng04-2010.pdf 2...
  35. D

    What is the impedance of a tank circuit at resonance?

    Homework Statement a) Determine the impedance of this circuit. b) What is the impedance when \omega = \frac{1}{\sqrt{LC}} Homework Equations The Attempt at a Solution EDIT: I got the Z wrong. It's Z = \frac{L}{C(j{\omega}L - \frac{j}{{\omega}C})} For part b, I'm...
  36. K

    How to make a pressurized tank

    Hi everyone, lately I have been wondering how I could make a pressurized tank to test how waterproof my watch is - I am not keen to pressurize air, I figure it would be safer doing it with water. Any idea how you could do this DIY style at home? The best I could come up with is a tall...
  37. R

    How Quickly Will Water Drain from a Tank with a 13mm Hole?

    Hi there, I've been looking at some of the drainage equations i have found aroundthese forums and I am struggling a lot to understand. I am 13 and good at maths, where i struggle is reading the advanced equations and figuring out what some of the posters mean. Basicly i have a tank 50 cm...
  38. Z

    Can anyone figure our how to predict the volume in a tank at any time?

    I have a tank (actually a PVC tube with an end cap) that has an interior diameter of 86 mm. It stands on its circular face. Coming out near the bottom of the tank at a right angle is a metal pipe 11 mm in diameter (interior) and 312 mm long (in total that is, note that some of the pipe is...
  39. H

    How long will a lc tank circuit oscillate after power is removed?

    If a lc resonant tank circuit is disconnected from power how do you determine the length of time it will oscillate. L=1 henry, 500 ohms C=50pf Fres=22,507 hz
  40. Z

    How to predict the volume of a tank of water at any time? (fluid motion)

    We have a cylindrical tank of known dimensions. Attached at the bottom is a pipe perpendicular to the tank of known dimensions. We fill the tank with a liquid and let it drain out through the pipe. What formula will predict the volume of the tank at any time t? I believe the Hagen–Poiseuille...
  41. H

    AC Signal Amplitude Modulation in Resonant Tank Circuit

    I recently simulated a parallel resonant tank circuit on multisim. I put an oscope across the tank circuit and I get an AC signal, but what interests me is that it is amplitude modulated. The oscillations slowly build up in amplitude, hit a peak and then die back down. I think that the...
  42. P

    Help with Tank problem- NOT TYPICAL

    Help with Tank problem-- NOT TYPICAL It's been a few years since my last experience with differential equations so this is giving me some issues... Any and all help is appreciated. Problem: A 65 gallon tank has 20 pounds (or ~1 gallon) of sand in it with 35 gallons of water (completely...
  43. B

    I want a level sensor for a tank

    hey guys,i want a level sensor for a tank, a big industrial one, contains pulp for paper industry, i don't want a continuous data stream, just if it's under a certain level, turns on a pump, and if its over another certain level, turns it off, tell me the type of sensor, and the best...
  44. M

    Bernoulli's Principle and water tank

    Homework Statement A sealed tank is completely full of water. The water in the tank is stationary. The gauge pressure at the top of the tank is 150 kPa. A mechanical failure of the tank creates a hole of area 1.00 cm2 at the top of the tank. Water flows out of the hole, rising in a vertical...
  45. K

    Water tank and wave interference question?

    Homework Statement In a large water tank experiment, water waves are generated with straight, parallel wave fronts, 3.0m apart. The wave fronts pass through two openings 5.0m apart in a long board. The end of the tank is 3.0m beyond the board. Where should you stand, relative to the...
  46. C

    How to calculate heat flux in a hot water tank

    Hi. I wish to calculate the heat flux on a bottom plate of a hot water tank. Would simply (m*c*t)/area give me the correct results. Please help?
  47. MattRob

    Speed of Sound in Compressed C02 Tank

    Hey, I've built a Cold Gas Rocket using a Co2 tank that stores liquid C02 at room temperature around 850 psi. (A Cold Gas Rocket is a rocket that uses a pressurized tank to propel the reaction mass instead of combustion, essentially just open a scuba tank and that's a very dangerous (not the...
  48. C

    Energy of water flowing down from a tank

    Hi, I have a garden which I water with the help of a garden hose, which drains water stored in a overhead tank (water tank at a certain height). Here is what I observe - when I partially close the tip of my gardern hose, the velocity of the water increases and hence the water reaches farther...
  49. U

    Heat transfer coefficient of water and air with tank problem

    Hi all :) I'm trying to figure out how much heat I can save from covering a tank which is open (uncovered). The tank is rectangular made of steel and is filled with water, heated to 50C, and is not insulated with any material. The outside temp and humidity is assumed to be 25C and 60%...
  50. B

    Calculating Sun Temperature from Tank Heat Absorption

    Lets take this specific example: Sun is radiating heat and a water tank with a certain surface area S absorbs this heat. Sun rays are perpendicular to this tank. [PLAIN]http://pokit.etf.ba/get/778c2978a453178481d142a891ae07c5.jpg If I know much energy did my tank of water...
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