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. P

    Tank filled with liquid, help?

    Homework Statement A tank is filled to the depth h1 with a liquid with mass density p Over the liquid surface is an atmospheric pressure po. From the bottom of the tank there`s a tube with cross-sectional area of ​​S. Tube expands to double cross-sectional area 2S while bending up to the...
  2. P

    Measuring pressure of water tank

    Dear All My water tank fixed on roof top 5M from the ground Height of tank 1m width of tank .75m ( Cylinder type water tank ) if water out from the tank by .5 inch hose how can I measure the pressure at 1m height from the ground Please advice Thanks in advance
  3. S

    Shear stiffness for elevated water tank

    Hello, I just have simple question regarding shear stiffness for elevated water tank, this tank is elevated on a column and this column is fix in the base my question is which formula should i use to calculate k k=3EI/L3 OR 12EI/L3 i know the the first for fix pin case and the second...
  4. M

    Work Done on Horizontal Tank pumping oil

    Homework Statement A gas station stores its gasoline in a tank underground. The tank is a cylinder lying horizontally on its side. The radius is 3 ft, the length is 14 ft, and the top of the tank is 10 feet under the ground. The density of gasoline is 42 lb/ft3 a) Consider a slice of gasoline...
  5. M

    Pressure on the Bottom of a tank

    Homework Statement A lobster tank in a restaurant is 8 ft long by 7 ft wide by 2 ft deep. Find the water force on the bottom and on each of the four sides. The density of water is 62.4 lb/ft3.Homework Equations Pressure = density * gravity * height Force = Pressure * Area The Attempt at a...
  6. MarkFL

    MHB Kendra N's question at Yahoo Answers regarding work done to empty a conical tank

    Here is the question: Here is a link to the question: Applying integration to physics and engineering? - Yahoo! Answers I have posted a link there to this topic so the OP can find my response.
  7. E

    Wave produced in a ripple tank appear to stand still at 66.7Hz?

    For an experiment involving a ripple tank and a wave monitor, the frequency was changed from 10Hz to 100Hz and it was found that at precisely 66.7Hz, the wave produced appeared (to the viewer) to be standing still. At any value below 66.7 Hz the wave moved inwards, and at any value above 66.7Hz...
  8. D

    Reaction force for force exiting a tank through a clean hole

    Homework Statement Determine the reaction force from water flowing through a clean 0.02cm (Diamater assumed) hole in tank depth 3m Homework Equations P = rho.g.h A = Pi.R^2 P=F/A The Attempt at a Solution P = rho.g.h = 29400 Pa A = Pi.R^2 = 0.00031415 m^2 P = F/A -> F = PA =...
  9. icesalmon

    Calculating Work for Pumping Oil from a Spherical Tank

    Homework Statement A spherical tank of radius 8 feet is half full of oil that weighs 50 pounds per cubic foot. Find the work required to pump oil out through a hole in the top of the tank. The Attempt at a Solution this is an example problem in my book and they start off by subdividing...
  10. K

    Calcuating energy from Air Tank

    Hi, I was working with my Air compressor today and was wondering if there is a way to calculate the amount of work or energy that is stored within a air tank? The air compressor is a 2.5hp, 112L/m 120Psi and volumes is 40L. From these details can the work be calculated or is more...
  11. D

    A rubber ball is plugging a whole in bottom of tank. When will it fail

    Homework Statement A 3 cm radius rubber ball weighing 5 g is used to plug a 4cm hole in the base of a tank. The tank is in use and is gradually emptying. At approximately what depth will the plug fail by floating up and out of the hole? Homework Equations Density The Attempt at a...
  12. Q

    Determining Concentration of a Tank (Using Linear Differential EQ)

    Homework Statement The problem states that we have a tank with a capacity of 400L filled with a mixture that has a concentration of 0.05g Chlorine per Liter. The concentration is reduced by pumping in pure water (zero concentration of chlorine), at a rate of 4L/s, and pumped out at 10L sec...
  13. M

    Tank Circuit Problem: Solving 0 Hz Frequency

    Hello all. I'm trying to make a dead simple tank circuit and test its frequency using either my multimeter (which has the Hz measurement) or my oscilloscope. Now I've never built one of these circuits before but it looks fairly straightforward, however I've had no luck so far in generating a...
  14. A

    Volumetric flow rate of air into a tank - Fluid Mechanics

    Hi all, I am stuck on a problem, and it's been a while since I took fluid dynamics. I have a cylindrical tank of know capacity with an inlet, where a vent is attached, and an outlet, the fluid gets sucked. The tank has fluid in there with known volume and density. If I know the usage rate of...
  15. I

    I Just Thomas the Tank Engine

    Thomas the tank engine and Diesel are involved in an elastic collision. A 2.5 kg Thomas is at rest but is approached head-on by a 5.0 kg Diesel moving at 0.60 m/s. The force-separation graph for the ensuing collision is given. FYI I am terrible with graphs, IDK WHY.. :frown: mT =...
  16. O

    Vacuum pressure inside a 650 gallon tank

    Need to find out how much force would it take to pull up 650 gallons of water into a tank from the bottom by sucking out the air from the top of the tank? Also how much vacuum pressure would be inside tank once full? I am basing this off an upside down fish tank. Example on youtube or...
  17. S

    Calculating the forces on a wave tank from a traveling wave

    Homework Statement I am in currently in Physics 2 (second of a calculus-based, three part series during second year of college), and this quarter my group has been tasked with writing a grant request to the powers that be in an attempt to get funding for a decent-sized wave tank. It's been...
  18. R

    ASME Tank Certification: Pros and Cons for Nitrogen/Fire Aid System Tanks

    I am part of a potentially fast growing company here in the states. We've designed and manufactured a nitrogen/fire aid system that consist of 30 & 60 gallon tanks that hold the actual fire aid foam solution (not the nitrogen). Our tanks are not ASME certified so I have the following...
  19. B

    Calculating Pressure on Tank Walls

    Hi all, A problem pops up while I was trying to calculate the pressure impacts on my aquarium tank walls. The first formula comes up to my mind was: p = d*h where d is pressure at one point inside the liquid d is density of the liquid (assume it's pure water) h is the height or...
  20. D

    Solution pumped into a tank problem.

    Homework Statement Suppose that a large mixing tank initially holds 400 gallons of water in which 65 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 6 gal/min, and when the solution is well stirred, it is pumped out at a faster rate of 8 gal/min...
  21. V

    Bernoulli's Equation (Water Outflow Speed of Tank)

    Problem: Suppose the top of a tank is sealed and pressurized to twice atmospheric pressure. What is the speed of the liquid emerging from a small hole at the base of the tank? My Solution: Using Bernoulli's Equation, and assuming v_top ≈ 0, P_top + 1/2*ρ*v_top^2 + ρgh = P_hole +...
  22. D

    SIN Contest Water Tank in a Moving Vehicle Question

    Homework Statement Audrey McLaughlin has a vehicle with a built-in rectangular swimming pool. The pool is 2.4m long, 1.4m wide, and is partly filled with water to a constant depth of 1.2m as shown. Calculate the minimum additional height, h, to avoid water spillage when the vehicle maintains...
  23. B

    The fuel level inside a tank.

    . I do not know how to solve this problem. I need some help. How would we find out A, the angle between the horizontal and the fuel level line inside the tank of a car?. The car speed does not change, let´s say 60 km/hr, but we are driving in a roundabout. So, the fuel inside the tank...
  24. M

    How do you set up a differential equation for draining a conical tank?

    I am working on a paper at the moment which has to do with draining tanks. I have already set up a differential equation which explains the drain from a tank where the cross-sectional areas of the container and of the outflow are constants. But now I have to set up one which explains the drain...
  25. M

    Hydromechanics - Flow from a tank with one outflow

    Homework Statement I'm currently working on a project which has to do with flow from a tank with one outflow. I have to set up a mathematical equation which describes the flow. Furthermore I have to explain the physics behind the model. The image shows the container and the outflow. In order...
  26. F

    Fluid Mechanics HW How pressure in a tank affects exit velocity of a fluid

    I'm just a bit lost on how to find the change in pressure. I've posted a picture of my work thus far.
  27. S

    Ripple Tank, Double Slit: Waves

    Homework Statement A double-slit interference experiment is done in a ripple tank (a water tank using a vibrating rod to produce a plane wave on the surface of the water). The slits are 6.00 cm apart, and a viewing screen is 2.15 m from the slits. The wave speed of the ripples in water is...
  28. G

    Finding the air cavity resonance of a propane tank for a drum.

    I am going to build a drum out of a propane tank. I think it will be handy to find the resonant frequency of the tank and choose the tuning accordingly so not to pick frequencies that are extremely damped. I have a cavity resonance formula found on hyper physics I am not going to build a...
  29. J

    Easy problem with heat transfer from surrounding air to water tank

    Hi! Im doing some measures on a closed water tank with the water temperature 14C and surrounding air with temperature of 20C. I want to know how much heat transfer there is between the surrounding air and the tank. A= 47m2 (area of tank in contact with the surrounding air) Q=UA...
  30. U

    Fluid mechanics water tank level

    Homework Statement A large cylindrical tank has a hole of area A at its bottom. Water is poured in the tank by a tube of equal cross-sectional area A ejecting water at the speed v a)The water level in the tank will keep on rising. b)No water can be stored in the tank. c)The water level...
  31. F

    Time it takes for a water tank to empty

    Homework Statement A cylindrical tank of diameter 2R contains water to a depth d. A small hole of diameter 2r is opened in the bottom of the tank. r<<R, so the tank drains slowly. Find an expression for the time it takes to drain the tank completely.Homework Equations...
  32. G

    Pressure Energy Transfer From 1 Tank to Another 1

    When I have a full tank of compressed air that I need to move to another tank will it require the same amount of energy that it took to compress it to move it? 2 -- 318 cubic feet (equal volume) compressed air tanks are side by side. One is full at 312 psi and the other is at atmospheric...
  33. P

    Any method to find the tank size without knowing the dimensions?

    hello.i need to add chlorine to an OVERHEAD water tank.for that i need to know the proper quantity of chlorine to be added.and for that i need to know the tank capacity.unfortunately i do not know the dimensions of the tank,neither i have drawing of it..BUT...a vertical inline pump sucks water...
  34. J

    Thermodynamics Rigid tank problem

    Homework Statement A closed, rigid tank filled with water, initially at 20 bar, a quality of 80%, and a volume of .5 m^3, is cooled until the pressure reaches 4 bar. Evaluate the heat transfer, in kJ, and draw the process in a T-v diagram Homework Equations ΔU=Q-W (but W goes to zero...
  35. K

    Force Exerted by 20,000N Boulder in 0.4m^3 Tank

    I know the weight of the boulder is 20,000 N and the volume is 0.4 m^3 Wouldn't the answer just be 20,000? Since the force is the same thing as weight? the options are: (a) 12,460 (b) 17,860 (c) 16,080 (d) 14,450 (e) none of these
  36. M

    Thermodynamics-Two Insulated Tank System

    1. Homework Statement Two large, well-insulated tanks of 2m diameter and 5m in height are filled with air. One tank is initially at 1bar and 300oK and the other is at 10bar at 300oK. Determine the final temperature in both tanks if a valve connecting the two tanks is opened and the mass...
  37. M

    Thermodynamics-Two Insulated Tank System

    Homework Statement Two large, well-insulated tanks of 2m diameter and 5m in height are filled with air. One tank is initially at 1bar and 300oK and the other is at 10bar at 300oK. Determine the final temperature in both tanks if a valve connecting the two tanks is opened and the mass...
  38. M

    Calculating work in a hemispherical tank

    This actually is from a calculus course, but the problem's a physics application. I was unsure if whether or not I should ask this in the math section or the physics section, so apologies if this doesn't exactly fit in here. Homework Statement "A hemispherical tank of radius 6 feet is...
  39. A

    Differential Equation- Height of water in tank

    Homework Statement A water tank is filled by an inflow x(t), the tank is emptied by the outflow y(t) The outflow if controlled by a resistance R The water depth in the tank is represented by d(t) The surface area of the water is A, independent of depth The tank is 1.5m high with a...
  40. P

    Differential Equations - Mixture in an overflowing tank

    HOW IS THE FOLLOWING QUESTION DONE? Milk chocolate is being produced in a 300 litre tank, which initially contains 100 litres of milk. The following things then occur simultaneously:  1. Liquid cocoa (made up of equal parts cocoa solids and cocoa butter, both in liquid form) is added at...
  41. A

    Vacuum an aluminum tank as a function of volume of change

    Hi all, I am working on thermodynamics problems, and can't even seem to figure out how to start it. I came across a scenario in which an 100gallon aluminum horizontal half-filled diesel fuel tank imploded because the vent was plugged. I know the basic concept behind the happening, i.e...
  42. E

    Probability of picking fish from a tank

    Homework Statement a fish tank contains 12 male and 12 female guppies what is the probability that at least half of male will be selected if 15 fish are randomly selected and removed from the tank?? Homework Equations The Attempt at a Solution i am tried to find the probability as...
  43. G

    What is the minimum pressure in an evacuated tank half-filled with 40°C water?

    Homework Statement A tank half-filled with 40°C water is to be evacuated. What is the minimum pressure that can be expected in the space above the water? Homework Equations Vp water @ 40 degrees = 3.38 The Attempt at a Solution I would have just subtracted the vapor pressure...
  44. N

    Square or Rectangle 30 psi storage tank

    If I want to make a Square or Rectangle storage tank 5 feet deep and 22 feet long and 1 foot wide. The tank will be under 30 psi and also vacuum. That’s not hard to do what I want is the walls not to deflect more then .001 of an inch. The walls can be plastic, plywood with a steel sheet or...
  45. S

    Temp within Comporessed Air tank

    Anyone help with an answer? I have 90litres of Compressed air @ 3000psi. Can anyone tell me the actual temperature in the tank?
  46. P

    I got burned by a helium tank valve. How?

    Hi folks. I had a strange thing happen to me and I was wondering if some of you physics gurus could explain it to me. It's my understanding that gas escaping from a pressurized tank makes things cooler. In fact I recently had to empty my scuba tanks for transport and the valves did indeed ice up...
  47. J

    Calculating Primary and Differential Settlement of a Covered Steel Tank

    [b]1. A covered steel tank (unit weight=80kN/m^3) 15m in diameter x 10m high and with 20mm wall thickness is filled with liquid (unit weight=9 kN/m^3) up to a height of 9.9m. The tank sits on a concrete (unit weight=25kN/m^3) foundation. 15m in diameter x 0.6m thick. The foundation rests on the...
  48. A

    What product can I use to line my dosing tank for my boiler?

    I have an old tank on site that is in need of some TLC. Its a dosing tank for our aux boiler. It has a good bit of surface rust but its nothing a grinder can't fix. Does anyone know of a product I could line this tank with? Maby some sort of spray on product or a product that can be laid...
  49. A

    Final State Tank Homework: Solving E_out,mass Integral

    Homework Statement Given a tank filled with gas, you are to pump out a given amount and find the final state of the tank. Given the volume, gas (non-ideal), amount of gas in tank, flow rate, temperature and pressure, all at state 1. We can find density at state 2 from the tables, but we need...
  50. P

    Outward force on a tank of water.

    Homework Statement There's a 30 m high, 30 m diameter cylindrical metal tank used for storing water. The molasses has a density of 1000 kg/^3. If the pressure at the surface was equal to the air pressure outside the tank, find the force pushing outward on the sides of the tank. Homework...
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