Calculations Definition and 982 Threads

  1. J

    How Do You Calculate the Charge Between Two Asymmetric Cylinders?

    Hey all, I'm trying to calculate the charge that forms on two adjacent and asymetrical cylinders when a voltage is put between them. The figures I was using was something like 1mm radius for one and 10mm radius for the other, a voltage of about 20kV and a separation of a few cm. I thought...
  2. E

    Hydraulic Calculations: Pressure, Pumps & Pistons

    Hi ... Want to know about " How I can calculating ... Or ... Using Wich Formula " that is making me able to finde the relationship between the Haudraulic Pump Pressure and the Piston Pressure .? on what i should depend when i want a piston and a hydraulic pump For Example : I have a...
  3. G

    Are there any antimatter calculations?

    Are there any antimatter calculations, that are in any way related to antimatter? (Please post the equation and the use of it :)) Also, I already am aware of the E = mc^2 one ;)
  4. T

    Calculate Room Temp with Radiator at 0 C Outside Temp

    A room has a need for 2000W for an outside temp of -20 C. A radiator with this capacity is installed and receives water at 90 C, which exits at 70 C. But because of some error only 40% of the intended water amount flows through the radiator. The water temp delivered to the radiator is adjustet...
  5. B

    Heat of Reaction - Calculations Help

    Hey I would really appreciate help on the calculations, because I am just not quiet getting it. I had 3 different reactions I had to do. First, some things to note: Since all the solutions are dilute, then the density of each soltuion can be assumed to be 1.00g/mL. So, 100mL has a...
  6. E

    Plotting Root Mean Square Calculations with Radians

    I tried some formulas on my graph calculator after reading about root mean square calculations of power and physics. Plot these using radians: Y1 = (sin(X)^2)^(1/2) Y2 = (tan(X)^2)^(1/2) Y3 = (tan(X)^3)^(1/3) Axis: 0<x<2(pi) 0<y<2(pi) or zoom to fit! kinda cool huh! Has anyone...
  7. S

    Why Do Chemistry Equations Feel So Challenging?

    I'm having trouble with the calculation side of Chemistry (ideal gas equation, amount of substance etc). I guess it's mainly the equations I am having trouble remembering.. If anyone knows of any site/place with them all on i'd _REALLY_ appreciate it, thanks.
  8. L

    Solving the Coaster Puzzle: Finding Variables and Calculations

    It's all still so confusing! Setting up the equation isn't the problem.. plugging in the numbers. I'm missing varibables and I don't know where to go to find themm i. if the spring constant is 2000 N/m how far will the spring have to compress to bring the coaster to a stop? (Asume the weight...
  9. B

    Tennis Ball Launcher Project Calculations

    I am building a tennis ball launcher for my physics class, and it needs to be no bigger than 1m X 1m, it must reach to a target that is 2 - 7m away from the launch site, and the target may or may not be at a certain height. No fire, explosives, gasses may be used. It must run on pure mechanical...
  10. V

    How Do You Calculate Energy Changes in Chemical Reactions?

    Hi, I having troubles with the following problems. 1) Calculate the energy change which will occur when 30g of nitrogen(II) oxide is converted to nitrogen(IV) oxide by reacting with oxygen in the air. 2)Copper(II) oxide can be reduced to copper metal and water by using hot hydrogen gas...
  11. N

    Impulse thrust calculations from pressure bottle

    Hi, Am wondering how to calculate the thrust and impulse thrust for gas escaping a pressure bottle - ie a scuba tank or the like. My maths is a lil shady so go easy on integration and such. Like say if I wanted 1MJ of energy output - what size bottle at what pressure with what nozzle...
  12. M

    Should I Use Absolute Values in JFET Calculation?

    HI, When doing some calculations for a JFET (n-channel), I guess u all know this equation: Id = Idss( 1 - (Ugs/Up))^2 my question is, am i supposed to take the absolute values (modulus) of Ugs and Up? Id = drain current Idss = saturated drain-source current Ugs = gate-source voltage...
  13. K

    What is the value of Mu needed for orbit calculations in the Earth-moon system?

    Hi again, I was able to solve the previous problems I had, with some study over the net and some books. Now I have a different problem: I have a routine that uses Mu (GM) for calculations; for the planets, Mu = GaussK * GaussK * ( 1 + mass ), where GaussK is the Gaussian constant...
  14. M

    How to Calculate the Residuum and [Na⁺] in a BaCl₂ + Na₂CO₃ Reaction?

    Hi I got a couple of questions regarding the following chemical reaction. First some calculations: 90,0 \textrm{mL of} \ 0,250 \ \textrm{M} \ BaCl_{2} is mixed with 0,500 \textrm{M} of Na_{2} CO_{3} which generats residuum. a) BaCl_{2} \rightarrow Ba^{2+} + 2Cl_{2}^{-} \ (i)...
  15. J

    Torque Calculation for Motor Simulations

    Hello Everyone, I am a programmer and I am working on an application that can do torque calculations for some motor simulation models that I am working on. What I have is a torque data file wilh data representing the amount of torque on a wheel at a given degree of it's rotation (so if I had...
  16. A

    Solving High Voltage Problems: Circuit Diagrams & Current Calculations

    Please help me wif these problems! I have no idea. A person with a body resistance between his hands of 10 kohms accidently grasps the terminals of a 20 kV power supply. (a) Draw a circuit diagram including all the data. (b) If the internal resistance of the power supply is 2000 ohmns, what...
  17. G

    Anyone here look at Einsteins calculations?

    The most popular equation is E=mc2. I remember growing up the hype was only like 2 people in the world could understand the Theory of Relativity. I have never looked at the actual calculations behind that simple equation. How it was derived. I'm just curious if anyone here has looked...
  18. F

    Designing a Torque Wrench: Seeking Help for Calculations

    Hi I'm designing a torque wrench. But i need some help. I have a drawing torque3.jpg the gear connects to the socket. If I'm putting 300ft/lb torque on a nut using the socket connected to the gear. and the gear connection to the handl thru the gear locker, and the gear locker can push...
  19. F

    Designing Torque Wrench: Seeking Help on Calculations

    Hi I'm designing a torque wrench. But i need some help. I have a drawing torque3.jpg the gear connects to the socket. If I'm putting 300ft/lb torque on a nut using the socket connected to the gear. and the gear connection to the handl thru the gear locker, and the gear locker can push...
  20. F

    Solving 2 Physics Problems: Work and Force Calculations

    k few questions I am stuck on... 1) A student with a mass of 80.0 kg runs up three flights of stairs in 12.0 sec. The student has gone a vertical distance of 8.0 m. Determind the amount of work done by the student to elevate his body to this height. (constant speed) and.. 2) Bob is...
  21. M

    Cooling with Liquid Nitrogen & Melting Aluminum Cans: Energy Calculations

    Problem 2. Liquid nitrogen, which has a boiling point of 77 K, is commonly used to cool substances to low temperatures. How much energy must be removed from 1.4 kg of gaseous nitrogen at 77 K for it to completely liquefy? Assume the latent heat of liquid nitrogen is 2.01 *10^5 J/kg Answer...
  22. M

    How Do I Calculate Pulley Sizes to Maintain RPM in Exhaust Fans?

    can you help? I have a restaurant exhaust fan with a drive pulley of 2" and a shaft pulley on the fan of 7 and 3/4 inches. The belt that fits this is 21/32" width. The belts keep wearing out very quickly. I think that larger pulleys would solve the problem. If I doubled the size of the...
  23. C

    Find Easy-to-Use Math Programs to Simplify Your Calculations

    Hi All, Does Anyone know of any Math programs that are easy to use that I can download from the net. What I am trying to do is organize a long string of digits in groups of three, add the groups, and subtract from each running total certain incremental values. Thanks in Advance. Dan
  24. S

    Is it possible to do calculations for systematic errors?

    Are percentage apparatus errors also systematic errors?
  25. K

    Advice on geometric calculations

    Hi, any advice out there on an interesting challenge (at least a challenge for me :-)? I am trying to come up with the easiest way to calculate the shortest distance between a single point and an arbitrary line. I want to start with lattitude and longitude coordinates for single point and...
  26. S

    Factoring dilutions into calculations

    Hey guys, gals (Monique :wink: ) Quick question. I recently completed a labortatory session in my Genetics class regarding the isolation and analysis of plasmid DNA, and a section of the report has me stumped. Before the plasmid DNA was put under the spectrophotometer, it was diluted in...
  27. L

    KsP calculations with solubility values

    Maybe I am doing something horribly wrong here, but these numbers just make absolutely no sense to me. We are given solubility values which will subsequently be used for Ksp calculations. I was given hydrogen bromide and 5 solubility values (given in g/100g H2O) Since 1g = 1mL basically...
  28. S

    How Do Clock Postulate Calculations Impact Time Measurement in Physics?

    Let me start by saying I most likly have no idea what I am doing. Also, that I realize the factor by which the moveing clock differs from the stationary one will be very very small. Sorry if this belongs in the math fourm, i thought it might require physics knowledge. What I'm having problems...
  29. ExtravagantDreams

    Matrices and Matrix Calculations of Linear Algebra

    My intent is to create a thread for people interested in Linear Algebra using Matrices. However, I will explicitly state that I am only a student of this class myself and that many things could end up being wrong or an improper way to teach. I will merely be going along with the class, mostly...
  30. chroot

    Solving a Dynamics Problem: Angle & Tension Calculations

    rat10mm asked me to help her with the following dynamics problem: Since this is actually a somewhat sophisticated problem, I decided to post the methodology here, in case someone else could use it. The first part: solving the angle of release. This is just an exercise in energy...
  31. B

    Are Refinements to Newton’s Calculations Necessary?

    Since I really displayed my ignorance of astrophysics and Newton in my first post “Gravity of the Sun?”, some of you may decide not to consider this one. I really was lost for a while and didn’t keep my argument on target. I am not a physicist by trade. The study of Physics is a hobby and the...
  32. F

    A Physics Question. No calculations Involved here. General Theory Type

    Just two general theory types of questions: 1. Is an object that undergoes circular motion accelerating? Is a force needed for this? Where does the force come from when something is moving in a circular motion? What is the name of this force? 2. For a car going around a flat curve, what...
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