1. M

    Convert cylindrical coordinate displacement to Cartesian

    Summary: I can't figure out how the solver carries out the conversions from cartesian to cylindrical coordinates and vice-versa. I have a set of points of a finite element mesh which when inputted into a solver (ansys) gives the displacement of each node. I can get the displacement values of...
  2. R

    Moment of Inertia and units

    Calculating moment of inertia and translating it between units, I've become confused. The example is a mass of 1kg at 2000mm from the pivot. The force is applied at 1000mm from the pivot. Basics as far as i'm aware: Moment of inertia = mass * Distance to center of rotation^2 Torque = Moment...
  3. F

    B How to find inverse steradian from arcmin^-2 for density of galaxy

    Hello, I am using a code on EUCLID future mission. The original author of this code has set a value for the density of galaxy equal to : ng = 354543085.80106884 I think this is expressed in inverse steradian. I think that EUCLID mission has a 30 arcmin^-2 value for density of galaxies...
  4. Shea Thompson

    Help converting the NIST spectrogram of Calcium

    I am not a physics major and dont know even where to start trying to interpet this spectrogram from the NIST website of the element Calcium My goal is to find a way of converting this spectrogram into a tone or frequency...
  5. S

    How to write the complex exponential in terms of sine/cosine?

    I apologize in advance if any formatting is weird; this is my first time posting. If I am breaking any rules with the formatting or if I am not providing enough detail or if I am in the wrong sub-forum, please let me know. 1. Homework Statement Using Euler's formula : ejx = cos(x) + jsin(x)...
  6. E

    Physics Homework Help of converting to years (astronomy q)

    A star is 3.7 x 104 ly (light-years) from the center of its galaxy and is moving in a circle around that center at a speed of 170 km/s. (a) How long does it take the star to make one revolution about the galactic center? (b) How many revolutions has the star completed since it was formed about...
  7. B

    Confused with the relationship between Volts, Current, and Power

    1. Homework Statement For an engineering assessment (first year with no electrical background), we are using a solar panel to power an element for a distillation system. we have calculated our heat energy output requirement that we need from our heating element as being 800 J/s. For simplicity...
  8. T

    B Temperature Conversions

    Why is that whenever we convert a temperature, say ##^\circ C## to ##^\circ F##, we use ##T_F = \frac{9}{5}T_C+32##, but whenever it involves a rate, say ##^\circ C/m##, we only multiply by the slope of the previously given formula? I would say it's because of the latter being a rate so...
  9. Bunny-chan

    Motion graphs and their units

    1. Homework Statement I'm having some issues with the following exercise: The graph below represents the marking of a vehicle speedometer in funtion of time. Elaborate the corresponding graphs of acceleration and space traveled in function of time. What is the average acceleration of the...
  10. R

    How do I convert cubic picometer to cubic centimeter?

    Part of the question says: An unit cell has a cell edge of 288 pm. I got to the part where volume (288 pm)^3 = (288 x 10^-10 cm)^3 I have no idea how that equals 2.39 x 10^-23 cm^3 Only the Bold part ^
  11. Chadi B Ghaith

    I Find Oven Temperature at various moderate mode?

    Hello, I want to convert gas unit into oven temperature (Fahrenheit, Celsius). Which formula I can use? Also I want to know at which oven temperature we can assume it as moderately high or cool temperature??
  12. Cyril St-Amand

    Fischer-Tropsch Conversion / Kinetics

    Hi, We are currently working on a small-scale Fischer-Tropsch process. The modeling software we are using is HYSYS (Aspen). We want to produce X barils of oil / day using syngas (H2:CO ratio 2:1) using cobalt catalysts. The problem we are currently facing is that we do not have the kinetics...
  13. J

    Burnup Conversion

    Is there a conversion method to convert burnup from MWd/kgU or GWd/tU into % ? Always assuming that the fuel is UO2 with ~ 200 Mev per fission.
  14. S

    Specific Gravity of a Brine

    Hello all, I am currently trying to convert brine salinity values in ppm to the corresponding brine density. My understanding is that I can do that using ppm * SG = mg/L . However I do not know how to get the Specific Gravity (SG) of my brine. The data I try to convert has a minimum value of...
  15. R

    Potential energy to watts

    Could anyone help me with this sum - To generate electricity, 180000 kg water is dropped from a height of 50 m (let g = 10 m/s^2). If half the gravitational potential energy is converted to electric energy, how many 100 W bulbs can be lit ? Formula - Ep = mgh I calculated the potential energy...
  16. Ornella

    Conversion kW/h to kWh

    Hi everyone, I am working on a mathematical optimization model for a fuel cell. Currently I am facing a problem with the ramp-up of the cell. I have a modulation ramp of 4% of the nominal power (58.3 kW) per minute. My constraint in the model has to be in kWh (I have to precise that my...
  17. Aristotle

    Hexidecimal to Binary question

    1. Homework Statement After being given a decimal base 10 #: 716, I've converted it to hexidecimal and got 2CC. However, if I want to convert 2CC to BINARY, do I find numbers of base 2s that ADD up to 716 ( 1011001110) OR do I find binary values for 2 , C , C separately? (Such as 0010 1100...
  18. D

    A strange inconsistency when calculating area with decimals

    I have a question about a seemingly illogical and strange aspect of multiplication and unit conversion that I have never noticed until now. It concerns the issue of finding the area of a square/rectangle when the length and width are expressed as decimals/fractions. Ordinarily, when you find...
  19. C

    How do I convert from kJ/kg to kJ/mol?

    I have researched that isobutanol has a heat of combustion of 35981 kJ/kg; however I need this to be in kJ/mol. From calculations, the molar mass of isobutanol was found to be 74g/mol. How would I go about in converting this? Relevant equations (?) #mols=mass/molarmass But how can I use this?
  20. tjvv

    Conversion of g acceleration into "body weight"

    Hi guys, I have a table with vertical peak acceleration values [g] and I want to find out a formula that convert the [g] values into ground reaction forces in units of body weight (BW). I think Newton´s 2nd law (F = m x a) may help but I am stuck on finding a generic relationship (problem is...
  21. R

    DME from methanol dehydration?

    I've been reading that is possible to produce DME (dimethyl ether) from methanol using a catalyst. In the following website: I've found a catalyst for the dehydration of methanol to produce DME. I would like to know technical information about the...
  22. E

    How would you convert visible light to infrared or microwave

    Is it possible to convert light in the visible spectrum to infrared or microwave light. What processes would be used to do this? Thanks, EJ
  23. N

    Single-Phase to Three-Phase Cycloconverter

    When my classmate report about cycloconverters. He discussed about different classifications and types of cycloconverters. He also discussed how Single-phase to Single-Phase Cycloconverters operate. But when he approached Three-Phase to Single-Phase and Three-Phase to Three-Phase...
  24. J

    Significant Figures in Conversion Factors

    So from what I had initially understood, in a conversion problem, you go by whatever number has the smallest SF and round your answer to that number, even if that number is one. In the examples on my homework it seems like my teacher chooses a random number of significant figures for each...
  25. acehansen

    Need help with conversion of units

    1. Homework Statement Your patient weighs 70 kg the prescription states 0.5 mg/kg/hr. You have a bag of 250 mg in 50 mL. At what rate (mL/hr) will you set the pump? 2. Homework Equations I don't think I have to convert the units of this equation, just cancel them out... but I'm not entirely...
  26. RoundEarVulcan

    Optical drive SSD conversion Mac

    Hi guys, I was just wondering if any macbook pro owners have successfully converted the optical drive into an area to hold an SSD. I am planning on keeping my current HDD and adding the SSD. Please let me know how it went and how much it affected the performance. (2012 MacbookPro non-retina)...
  27. S

    Converting converting km/hr to m/s

    how do i convert km/hr to m/s?