What is Capacity: Definition and 664 Discussions

Seating capacity is the number of people who can be seated in a specific space, in terms of both the physical space available, and limitations set by law. Seating capacity can be used in the description of anything ranging from an automobile that seats two to a stadium that seats hundreds of thousands of people. The largest sporting venue in the world, the Indianapolis Motor Speedway, has a permanent seating capacity for more than 235,000 people and infield seating that raises capacity to an approximate 400,000.

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  1. M

    Solid State Heat capacity optical and acoustic

    Homework Statement A material has 104 atoms in its primitive cell with a speed of sound of 1500 m/s. It is well above the debye temperature. From Cv=3kb per atom, we calculate the volumetric heat capacity of 1.4*10^6 J m^-3 K^-1. What fraction of he heat capacity is in the acoustic branches...
  2. F

    Evaluating the capacity of steel plate

    Hello All. I'm trying to evaluate a design based on first principles. I have 2 trusses made from RHS (simple A frame) between which I wish to tech-screw a sheet of 2.9 mm galvanised sheet. Loading will primarily be from material (i.e. soil to a max depth of 400 mm) being placed on the...
  3. S

    Measuring higher voltages than rated oscilloscope capacity?

    I have a cheap oscilloscope that is rated for 10V input. I want to measure the quality of the output of my power supply due to a belief the DC filtering circuit isn't working well and producing harmonics in the signal (ripples). The output voltage is at a higher voltage coming out of a...
  4. B

    Heat capacity / letent heat question

    Homework Statement An ice cube of mass 40g is transferred directly from the freezer where it is at -8 CELSIUS to a cup containing 120g of water at 95 degrees CELSIUS. Calculate the final temperature of water. Ignore any heat transfer to the cup or its surroundings Homework Equations tf = ti +...
  5. D

    Specific Heat Capacity Question Mixture Q=MCdeltaT

    Homework Statement A mixture is made by adding 75g of an unknown liquid at a temperature of 25 degrees Celsius to 60g of water at a temperature of 90 degrees Celsius. The final temperature f the mixture is 65 degrees Celsius. Calculate the specific heat capacity of the liquid. What is the...
  6. N

    Heat Capacity v Specific heat capacity?

    Homework Statement what is the different in term of definition between Heat capacity and Specific heat capacity ? Homework Equations Q=mΔTC →C=Q/mΔT The Attempt at a Solution Specific heat capacity is the amount needed per unit mass of material so is a number independent of the...
  7. I

    Calculating Heat Capacity of Krypton at 90K

    Homework Statement Atoms of the inert gas Krypton are adsorbed onto a smooth solid surface at 90K. They can move freely over the surface but they cannot leave it. For a sample with total surface area 2.5 m^2, and a surface density 3 nm-2, what is the heat capacity of the krypton? Homework...
  8. F

    Heat Capacity Power Series Approximation

    Homework Statement "Derive a more accurate approximation for the heat capacity at high temperatures, by keeping terms through x^{3} in the expansions of the exponentials and then carefully expanding the denominator and multiplying everything out. Throw away terms that will be smaller than...
  9. D

    How to Calculate CFM for Air Cleaning 16 Tubes with 116 PSI?

    Hi, First time user here. I was hoping someone could help me calculate the CFM of air needed for an Air Compressor to air-clean 16 tubes. The Compressor is connected to a header that has 116 PSI of Pressure. The header is connected to 16 thin pipes that have nozzle tips with a 1.5 inch...
  10. H

    Pressure dependence of the Heat Capacity

    I am trying to understand the nature of the dependence of heat capacity/specific heat on pressure. I understand that one may give the the following relations: \frac{C_p}{C_v}=1+\alpha\gamma T where C_p,C_v,\alpha,\gamma, and T are isoberic specific heat, isochoric specific heat, thermal...
  11. D

    Understanding the Importance of High Vital Capacity | Vital Capacity Questions

    Homework Statement what is the significance of having a high vital capacity? Homework Equations The Attempt at a Solution You can breath more effectively, more air/breath?
  12. J

    Heat Capacity Database: Find Common Substances Data

    hello, I'd like to know if there is any heat capacity database of some common substances. I've searched the internet for a while and I haven't found anything so it would be really kind if someone could provide me this data or link/refernce to it, because now I really need it for a project...
  13. A

    How do I find the pressure capacity of a tungsten tube?

    I am looking to find the maximum psi or atm capacity of a tungsten tube of 99.9% tungsten. How would I do this?
  14. B

    Calculate Specific Heat Capacity HELP

    Calculate Specific Heat Capacity HELP! Hi guys, I having big troubles with how to calculate the specific heat (cp) for refrigerant r134a i gas phase. I think that assuming ideal gas behavior is a bad idea since this is going to be used in a actual system... I have values of entropy...
  15. N

    Derivation of the Debye Specific Heat Capacity

    Homework Statement Hello everyone! I'm using the text: "Elements of Solid State Physics - JP Srivastava (2006)" I have followed the argument leading up to the derivation of the Debye formula for specific heat capacity, so we now have; C_V = \frac{9N}{\omega_D^3} \frac{\partial}{\partial T}...
  16. A

    Specific heat capacity and temperature

    Why does the specific heat capacity of an object changes with temperature?Please explain in detail.Thanks..
  17. N

    Hot metal added to Water, Heat Capacity Problem

    Homework Statement A 100.0 g copper sample (specific heat 0.385 J/g K) at 100 C is added to 50.0 g of water at 26.5 C. What is the final temperature of the copper-water mixture? Homework Equations q = q(copper) + q(water) q = (heat capacity)(change in Temp.) q = (specific...
  18. M

    Solving a Student's Experiment on an Ideal Gas: Molar Specific Heat Capacity

    Homework Statement A student performs an experiment on an ideal gas by adding 42.0 J of heat to it. As a result the student finds that the volume of the gas changes from 50 cm3 to 150 cm3 while the pressure remains constant at 101.3 kPa. i) If the quantity of the gas present is 0.007...
  19. L

    Calculate the heat capacity at constant volume and constant pressure.

    Homework Statement I am given the amount of moles of gas, how many joules of heat I put into the system, and a positive change in temperature. Then it says "calculate the molar heat capacities at constant volume and constant pressure of the gas." Homework Equations q=CT, C(constant...
  20. T

    Calculating Energy Capacity for a Town and Power Station

    Wasn't sure if this was the right location for this, but seemed more electrical engineering based. Just doing tutorial exercises WHICH I CANNOT EVEN FIGURE OUT WHERE TO START. -Town Population - 100 000, average 4 people per household -Average consumption per HH - 2kW at all times of the...
  21. N

    Calculating Hard Disk Read/Write Time & Capacity

    Homework Statement Suppose the hard disk above has 1024 cylinders, 8 tracks per cylinder, 32 sectors per track and 512 Bytes per sector. The maximum seek time is 450 msec, the time to move between adjacent cylinders is 10 msec, the rotation time is 14. a) If the entire disk was full of...
  22. J

    Population growth carrying capacity on a logistic model

    Homework Statement Here is the equation I am given. I'm supposed to find the carrying capacity. dp/dt=.05P-6.6666667e-5P^2 I know the general solution is rp-rp^2/k with k=carrying capacity, but the addition of the middle term has thrown me off. The Attempt at a Solution I tried...
  23. I

    Heat integral and molar heat capacity?

    dQ = nCvdT if volume is constant. However, n = pV/RT. What I don't understand is, why are we thinking n as constant when doing the integral? I had two problems that involved this on a test I had today. At first I kept it constant and then changed n. But then I thought, wait... isn't there a T...
  24. J

    What is the current carrying capacity of wire with 1.5mm^2 area?

    I have wire of 1.5 mm2(Flexible). Now i want to measure it's current carrying capcity how i can measure it's current carrying capacity?
  25. E

    Calorimetry(determination of specific heat capacity)

    can we determine a specific heat of a sample by cooling it to the temperature of ice rather than heating it to the boiling point of water?
  26. B

    Understanding Pump Capacity at 30m Head

    a pump capacity of 10 m^3/hr at 30 meters head. what does the 30 meters head mean? thank you..
  27. A

    Statistical Mechanics - Specific Heat Capacity

    Homework Statement Give an physical explanation to why the specific heat capacity goes to zero as temperature goes to zero. Homework Equations The Attempt at a Solution I was simply thinking that around absolute zero the average kinetic energy of the particles should be zero...
  28. J

    Simple theory question on capacity of wiring

    First post, simple question. Oddly enough, there is great dissention amongst my circle of friends as to just what forces are at work here. Of note, neither myself nor my friends are electrical engineers . . . . . obviously. I have a power source. . . . . . say 110 V AC. I have a 12 gauge...
  29. J

    Heat capacity of air at low temperatures

    Hello, would someone know where can one find tabulated values for the heat capacity of air c_{p} or the ratio \gamma = c_{p}/c_{v}? I need those at low temperatures and pressures, e.g. tending towards zero. So far I was only able to find \gamma tabulated for high pressures in Perry's...
  30. F

    What Happens to the Received Bits?

    Hello Forum, the "maximum" data rate that can be used over a physical "noiseless" channel is given by bits/s= 2*B* log2 M where B is the channel bandwidth (set of frequencies that are passed with little attenuation), and M is the number of levels we can change the chosen parameter of...
  31. M

    Declared Net Capacity in Mega Watts Electrical

    If a nuke units has a DNC of 1000 MWe, is this capacity per sec, hour, day, or year? I'm "assuming" this capacity is per hour but then again a Watt is a unit of seconds. In other words, If a nuke unit has declared net capacity (DNC) of 1000 MWe, how long would the unit have to run at...
  32. MathematicalPhysicist

    What are the scientific tests for measuring brain memory capacity?

    What scientific tests can be made to test what are my (or anyone else) memory capacity? And how do you measure our brain's memory capacity, what measure units do you use? is it like in PC with RAMs or SDRAM or what not?
  33. T

    Calc. Capacity Reduct. Factor for Masonry Column in Task 4

    calculate the capcity reduction factor for the column in task 4 based on your knowledge of column buckling. task4: a soild masonry column is 2.9m in height with a cross section of 270mm x 480mm. a single roof beam is the only connection at the top of the column, it provides enhanced...
  34. S

    Thermal physics; specific heat capacity

    Homework Statement In an experiment to measure the temperature of the flame of a Bunsen burner, a lump of copper of mass 0.12 kg is heated in the flame for several minutes. The copper is then transferred quickly to a beaker, of negligible heat capacity, containing 0.45 kg of water, and the...
  35. C

    How to calculate heat capacity of supercritical CO2

    Hello, 1. How can I calculate the heat required to raise the temperature of Carbon dioxide. It is at -40C and then it is to be heated to 50 C... The operating Pressure is above critical, so when it crosses the critical temperature point, the liquid CO2 would change into super critical state. (I...
  36. GRB 080319B

    Specific heat capacity and themal conductivity

    Can a compound have a high specific heat capacity and be a good thermal conductor, or are these properties mutually exclusive?
  37. S

    Transformer capacity based on physical size

    I once saw three very large transformers in a fenced area smaller than a typical substation fencing. They were close enough to read some numbers on a metal nameplate which gave a list of about 6 primary tap voltages in the 12000 to mid 13000 volt range. There were some other stamped numbers...
  38. P

    Specific Heat Capacity Experiment

    So our teacher wants us to find the temperature of a flame of a bunsen burner. To do so, he told us to do the following: Heat an aluminium block of known mass (160g), but unknown initial temperature. Drop it in a beaker with 500 ml of water, of known temperature (22 degrees) and let the...
  39. Telemachus

    Molar heat capacity (Thermodynamics)

    Homework Statement Hi there. I'm having some trouble on solving this exercise, which you can find on Callen 2nd edition. A simple fundamental equation that exhibits some of the qualitative properties of typical crystaline solids is: u=Ae^{b(v-v_0)^2}s^{4/3}e^{s/3R} Where A,b, and v0 are...
  40. S

    Calculating Heat Capacity for Cage Weight of 1000 kg at 9 m/s

    Homework Statement in the absense of bearing friction a winding engine would raise a cage weighing 1000 kg at 10m/s, but this is reduced by friction to 9 m/s, how much oil, initially at 20 C is required per second to keep the temperature of the bearing down to 70 C (specific heat capacity...
  41. S

    The difference between the entropy and the heat capacity? they are very similar

    the difference between the entropy and the heat capacity? they are very similar! hello ... as we all know that specific heat capacity = joule/ k entropy = joule/k they are same in units Q= m Cv dT Q/dT=m Cv...1 dS= dQ/T ...2 from 1 & 2 dS= m Cv .....??… I'm now confused...
  42. P

    Investigating Specific Heat Capacity with Boiling & Warm Water

    I am doing a lab about specific heat. i have a cup of boiling water which i put 5 metals into, and a cup of warm water which sits at 22 degrees celcius. i am to record the difference in temperature as i am using the equation Q = mc (delta) T for part one, and then i am using the equation C = Q/m...
  43. V

    How to Calculate the Specific Heat Capacity of an Unknown Metal

    Homework Statement How can you calculate the specific heat capacity of an unknown metal? In my question the metal with a mass of 50g and a temperature of 200 degrees celsius was placed in 125 g of water with an initial temperature of 20 degrees celsius. After the simulation and the metal...
  44. C

    What is the Specific Heat Capacity of Copper in Water?

    Homework Statement This was a LAB assignment. I need to find the specific heat capacity of a given metal (Cu in this case) in water, I have the following observations. Mass of water: 249.14g = 0.24914 Kg Initial temperature of water: 18 C Initial temperature of metal: 100 C Specific heat...
  45. A

    What Determines the Equilibrium Separation Between Atoms in a Lattice?

    Homework Statement [/b] Debye considered atoms to oscillate from 0 up to a nu max. It is explained further in the text that the complication (i.e., not all atoms oscillating at same frequency as shown in Einstein's formula) is accounted for, by averaging over all the frequencies present...
  46. S

    The cooling capacity of air-conditioner

    I would like to ask why the cooling capacity of air-conditioner is 2-3 time more than the work done by the compressor?? According to the conservation of energy, the amount of work input should be equal to the amount of heat absorbed(cooling capacity), isn't it?? Can anyone explain it...
  47. S

    Effect of electrical field on heat capacity

    Homework Statement Given the perfect gas molecules with permanent electrical dipole moment u in the field \epsilon. The potential energy is U = -u\epsilon\cos\Theta Derive the additional effect of \epsilon on the heat capacity. I need some hints, please help. Thanks.
  48. B

    How do I calculate heat lost by the hot water in a calorimeter?

    Homework Statement 1. Calculate heat lost by the hot water in the calorimeter. Initial temp: 22.90 C Finial temp: 23.25 C Density: 1.00 g/mL specific heat capacity: 4.18 J/gK Homework Equations qmetal=-(qwater+qmetal) q=m C dT The Attempt at a Solution When i use the second...
  49. D

    How Does Pressure Affect Heat Capacity in Identical Systems?

    I understand that the heat capacity of something run at constant volume is lower than at constant pressure, as at constant pressure the substance can expand, so some of the energy put into the system is used for work. If i have two identical systems and heat them under constant pressure...
  50. C

    Pool Filling & Emptying: Calculating Capacity & Rate

    Homework Statement The total capacity of the pool is 1000 cubic meters. the filling of the pool started on Thursday morning at 6 o’clock. On Friday morning at 9 o’clock when the pool was being filled, the pump for removal of water was started by mistake. Starting from this point onwards, water...
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