What is Rate: Definition and 1000 Discussions

The Institute for Creation Research (ICR) is a Creationist apologetics institute in Dallas, Texas that specializes in media promotion of pseudoscientific creation science and interpretation of the Genesis creation narrative as a historical event. The ICR adopts the Bible as an inerrant and literal documentary of scientific and historical fact as well as religious and moral truths, and espouses a Young Earth creationist worldview. It rejects evolutionary biology, which it views as a corrupting moral and social influence and threat to religious belief. The ICR was formed by Henry M. Morris in 1972 following an organizational split with the Creation Science Research Center (CSRC).Its work in the field of creation science has been rejected by mainstream science, but has been significant in shaping creationist thought in the United States by introducing creation science through fundamentalist churches and religious schools, and by engaging in public debates against supporters of evolution. The ICR also offers unaccredited graduate level programs in Biblical Apologetics, including a minor in Creation Research. The ICR also operates the ICR Discovery Center for Science & Earth History museum in Dallas, Texas.

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  1. T

    Flow Rate of a Liquid: Calculating Mass & Pressure

    (a) FIGURE 2 shows two cylindrical tanks interconnected with a pipe which has a valve that creates a constant resistance to flow of Rf when fully open. The height of liquid (of density ρ) in the first tank is hin and the second tank hout. The cross-sectional area of the first tank is Ain m^2 and...
  2. C

    Crude Oil Flow Rate Calculation: Viscosity & Reynolds Eq.

    Homework Statement The questions is: For many liquids the viscosity is strongly dependent on temperature. Use the table below to estimate the required maximum temperature of crude oil to flow at a rate of 4Kg s-1 through a 0.3 metre diameter pipe whilst maintaining a laminar flow. In the...
  3. V

    MHB Find the tax rate t that maximizes revenue for the government?

    Suppose that the relationship between the tax rate t on imported shoes and the total sales S (in millions of dollars) is given by the function below: S(t) = 5 − 9 * sqrt[3]{t} t = ? Find the tax rate t that maximizes revenue for the government. (Round your answer to three decimal places.)...
  4. dgd87

    Rotative Gas Lift Flow Rate

    Hi Everyone, I work with rotative gas lift systems, sizing the compressors (recip´s), I'm not that familiar with the oil well, though. I have a doubt regarding the gas flow going to the well. There is a new well which currently produces 0.4 MMscfd of gas and the client wants the system to be...
  5. M

    Measuring flow rate (Doppler device)

    Hello, I am new in this field, so maybe my questions will be stupid :) sorry for that :) In the company where I work, they measure flow rates of wastewater using Flow meter (Doppler device). The problem is, that the flow rate is very low, so this device is not submerged completely in the...
  6. F

    Why Doesn't the Flow Rate Change When a Vane is Moving in a Pipe?

    Homework Statement for part c , why when the vane is moving , the flow rate doesn't change ? ? Homework EquationsThe Attempt at a Solution The flow rate is given by the formula Q=Av , where A = area , v = velocity . IMO , when the velocity of vane change , the flow rate is no longer 0.687kg/s...
  7. J

    Calculating force input to air cylinder by airflow rate

    Hello there I'm having real difficulty with a problem to do with air cylinders and would really appreciate some help. I'm attempting to replicate the human breathing system in a simplistic form but I'm having trouble calculating the force required to provide the correct airflow rate at the...
  8. T

    B Is the Expansion Rate Truly Accelerating?

    I'm studying about accelerating expansion rate. I am reading that the rate of expansion is accelerating. Now the farther objects are from us the faster they are moving away from us due to expansion. Farther and farther, faster and faster. But that would occur even if the expansion rate is...
  9. M

    Rate of water flow experiment question

    Hi, I am mike from australia, I am new to the forums and am having trouble answering the question below, I have included some information on the experiment as well. You are given a water bottle with a pin sized hole in the bottom, and a line drawn around the bottle at the level that 50cm3 of...
  10. y2j

    Automotive Temperature and mass flow rate of ICE exhaust gas

    Hi everyone I searched about the mass flow rates and temperatures of exhaust gases of light gasoline internal combustion engine at different condition but I don't fond anything yet . Anyone can guide me? .
  11. stoky

    I Airflow rate through a rectangular section

    I need to mount several rectangular orifices or sections on a wall with those two factors: - 20 Pascals differential pressure (negative pressure inside) - Inlet air speed 1100 feet per minute (5.58 meters per minute) I've got the section of each window, and the air caudal to renovate. I would...
  12. Jason Sylvestre

    I Gradient Vector- largest possible rate of change?

    Hello, My professor just gave us a True or False problem that states: ∇H(x,y), the gradient vector of H(x,y), gives us the largest possible rate of change of H at (x,y). Now, he said the answer is true, but it was my understanding that the gradient itself gives the direction of where the...
  13. Geek007

    Bit rate, bit interval vs frequency, time period

    can we use frequency and time period terms for digital signals or we have to use bit rate and bit interval terms for digital signal. in simple words,
  14. H

    Radiation Dose Rate: 5 mL Pool Water Splash & 125 mL Ingestion

    If someone was splashed with 5 ml of reactor pool water over 10 cm^2 of there skin, how much dose they will receive? note: the tritium was created in the reactor pool water. Also if they swallowed 125 ml of pool water how much dose they will receive ? Thanks.
  15. B

    Finding out Shear rate of a bent pipe which has different bend radius values

    which has different radiuses at both end. Its actually two pipes merging after the entrance going straight and somewhere close to middle of the pipe it's bent 90°. So for simple pipes it's =4*Q π*r^3 But what for the pipe I...
  16. R

    Multivariable calculus: find the rate of change

    The problem is: The temperature (in degrees Celsius) of a metal plate, located in the xy -plane, at any point (x, y ) is given by the function of two variables T(x, y ) = x sin y + y2 sin x. (a) Find the rate of change in temperature in the direction of the positive x-axis at the point (π, π)...
  17. stacope32

    How Does Temperature Affect Reaction Rate and Activation Energy Calculation?

    http://antoine.frostburg.edu/chem/senese/101/kinetics/faq/temperature-and-reaction-rate.shtml According to Rule of Thumb, the reaction rate doubles when there is a 10 degree rise in temperature. I want to determine the activation energy for a lab, but my level of study is not advanced enough...
  18. A

    Force and rate of change of momentum

    My question is simply..if force does equate to the rate of change of momentum, then why is it not taughted as this rate rather simply a push or pull? Is it becuase really they are the same thing and it is much easy to explain/work with? Just curious Guess up until now I didn't even think of...
  19. Nivek Writer

    Nuclear Fusion Rate: Calculating Reaction Speed & Energy

    Hello everyone, I have a question about nuclear fusion. Deuterium-Tritium fusion generates 3.4 * 1014 J/kg when you have a mixture of around 400 grams of deuterium and 600 grams of tritium. My question is: what is the rate at which this fusion reaction takes place? Is there a formula for the...
  20. jdawg

    Fluid Mechanics:Volumetric flow rate and average velocity

    Homework Statement . Air, at a flow rate of 30 [N/s], flows through the reducer shown below. In the 300 [mm] diameter section of the pipe the specific weight of the air is 9.8 [N/m3 ]. When flowing through the reducer the pressure and temperature will fall causing the air to expand and...
  21. R

    Rate of Gaseous Diffusion into a Vacuum

    Hello Everyone, I have a question regarding the diffusion of a gas (or mixture of gases) into an evacuated space. The situation I am picturing is one where you have two vessels of equal volume, one contains a gas at room temperature, some known pressure (say ~760torr), and the other at static...
  22. ShellDough

    Question regarding the rate law of a reaction

    Homework Statement Data in the table were collected at 300 K for the following reaction: A(g) + B(g) → products Concentration of A 1.00 0.100 1.100 Concentration of B 0.100 0.100 1.00 Initial Rate (M/s) 1.29x10^-29 1.33x10^-30 1.30x10^-29...
  23. K

    Radiation Rate of 0.1m Cube Metal at 200C

    Homework Statement At what rate does a 0.1m cube of metal with emissivity e=0.75 radiate energy if it is at a temperature of 200C? Homework Equations H=AeσT^4, σ=5.67 x10^-8 The Attempt at a Solution I found the area of the cute to be A=(0.1m)^2=0.01m, and the turned 200C into 473K, but when...
  24. G

    Piezoelectric strain rate and frequency of applied voltage

    If one were to apply, for example, 60 Hz AC to a piezoelectric material, would the strain rate be 60 Hz? I am not entirely sure if I am using "strain rate" in its proper sense; I use it merely to describe what I imagine would be the rate at which the material expands and contracts while exposed...
  25. D

    Trying to understand convective heat transfer rate

    I am trying to understand the concept of convective heat transfer. I plugged in some values into the convective heat equation and ended up with q = 40. Now, I don't know what that means. What does that tell me about how long it would take to bring a given volume of air around a hot surface to...
  26. H

    What is the rate of motion in Right Ascension for the asteroid?

    1. Homework Statement This is an Astrometry problem. I am not sure or how exactly to proceed: Data: First off, I am unsure which data points to use. Should I use the values from right ascension or the values from the time index. 1 hour = 15 degrees 24 hours = 360 degrees Image 01...
  27. Z

    Calculate Flow Rate of a Syringe: Poiseuille's & Bernoulli's Laws

    I am trying to come up with a mathematical model so that, when the displacement of the plunger of a syringe is know, I can calculate the amount of a specific liquid in the barrel. Or the relationship between the speed of the plunger and flow rate at the tip of the needle (Again assuming that the...
  28. Q

    Question Concerning the Rate of Expansion

    I admit that I do not have much knowledge pertaining to relativity and space expansion, however I do know that all speeds are relative excluding light. This makes sense to me, however a new article published says that "Space itself is pulling apart at the seams, expanding at a rate of 74.3 plus...
  29. N

    Calculating N2O4 Reaction Rate in 4L Container

    Homework Statement N2O4 --------------> NO2 N2O4 for k = 0.050 s-1 The process starts from 0.20 mole of N2O4 in a container of 4.0L. Calculate v for N2O4. if 3/4 of the N2O4 is converted Homework Equations To calculate concentration c= mole/L The Attempt at a Solution 0.20 mole /4.0 L...
  30. R

    Method for bubbling gas into a liquid at a specific rate?

    If there are any experimentalists out there maybe you could help? I need to bubble gas through a liquid at ~80 mL/min is there a specific instrument designed to do this? I'm assuming it's some sort of pump, what would it be called in a chemistry lab? Thank you for any suggestions / help.
  31. AEGIS

    High school project -- Finding mass flow rate, air velocity

    Hi, First-timer here! I'm designing a physics project that involves pumping a certain pressure of air into an empty bottle. SETUP: The bottom of the bottle has a small hole through which a thumb tack fits tightly; the top (cap-side) has a valve through which the air is inserted. The bottle is...
  32. K

    Flow rate of water from thin tubes under high g-force

    Hi guys, I was wondering if you could help me with something. I work in the paper industry with what is called a suction roll. The roll has a rotating perforated steel cylinder with a stationary vacuum box on the inside and as the wet paper web travels over the surface of the roll, the vacuum...
  33. T

    Catalyst increasing both forward and reverse reaction rate

    The question is: Which takes place when a catalyst is added to a reaction at equilibrium? A. The point of equilibrium is shifted to the right. B. The point of equilibrium is shifted to the left. C. The forward and reverse reactions rates are increased unequally. D. The forward and reverse...
  34. H

    Understanding G and γ in Volume Flow Rate Calculations

    Homework Statement what is G and γ mean here ? Homework EquationsThe Attempt at a Solution
  35. Suraj M

    Williamsons ether synthesis (rate)

    Homework Statement Which will undergo faster Williamson ether syntehsis It was either faster or better, I'm not sure A)3-Chlorobutan-1-ene B)1-Bromobutane Homework EquationsThe Attempt at a Solution I thought option A because of its alylic position it will form a stable carbocation (and...
  36. N

    Help with mass flow rate of turbine?

    Homework Statement An turbine expands air at 1300 kPa and 500oC to 100 kPa and 127oC. Air enters the turbine through a 0.2-m2 opening with an average velocity of 50 m/s, and exhausts through a 1-m2 opening. Determine (a) the mass flow rate of air through the turbine Homework Equations PV=RT m...
  37. Hemanth Atthipatla

    Flow rate between two Tee-joints

    does the flow remains constant ... even when length of the two connected tee joints increases ? my thing is ... i want to maintain the same pressure and flow in two different tee joints connected to some length... while doing my experiment practically... (pipe- 10mm dia, legri tee joints,) i got...
  38. x2017

    Determining the rate at which speed changes

    Homework Statement A golfer sinks a hole-in-one on a mini-putt golf course. The ball leaves the putter face with a speed of 4.04 m/s, travels a distance of L1 = 4.38 m, and bumps into a bank with a speed of 3.34 m/s, rebounds at 90° and travels a length of L2 = 3.26 m into the hole. Assuming a...
  39. hypnoticdesign

    What exactly is a sample in terms of sample rate (audio)

    I can't seem to find an answer anywhere to this just by searching. I'm trying to understand samplerate more thoroughly. I know 44000 samples per second means that the highest frequency that can be recorded is 22000 hz but what is each sample? Does it mean there is a constant 44000 snippets of...
  40. L

    False positive rate over two tests

    Hi everyone, and happy new year! A colleague at work came up with this problem today, which I find very interesting. We are both chemists, so our ability to solve it is limited - here I am asking for your help! In a target discovery campaign that we run, we have two separate tests, let's call...
  41. H

    Deceleration rate with studded snow tires

    A car going 25 mph with studded tires on packed powder stops in 20 meters. What will be the stopping distance if it is going 20 mph? We do not know the mass of the car, but perhaps it is accurate to create an acceleration constant that will apply for other speeds? a=v/t and v=d/t so therefore...
  42. M

    Burner and fuel consumption rate

    I don't know how to determine the fuel consumption rate of a gas burner and would like to seek for help. Also, is there any relationship between the number of rings of gas burner and the fuel consumption rate?
  43. I

    Indicator for international accepetance rate

    Is the ratio of tuition rates for international to domestic a good indicator of the relative difficulty for an international student to get admitted to a particular school compared to a domestic one, all other factors kept constant?
  44. C

    "speed rate of change" vs. "velocity rate of change"

    Homework Statement At a moment in time a particle has a velocity of v = 3 m/s î + 4 m/s ĵ, and an acceleration of a = 6 m/s2 î + 3 m/s2 ĵ. Find the rate of change of the speed of the particle, that is, find d|v|/dt. (better formatted reference...
  45. M

    How to calculate Air flow rate....?

    Sir, Kindly let me know how to calculate flow rate (cfm or Litre/m) of air flowing through a pipe of 12 mm dia from a reservoir at pressure 7 kg/cm2 to atmosphere. i.e ;- how much volume of compressed air could pass within a minute through a "X"mm dia pipe from a constant pressure (7 kg/cm2)...
  46. K

    How do I calculate speed in a pulley system when all ropes are connected?

    Homework Statement I have a problem when doing math for pulley problems - if not at least one of the rope segments in independent, I do not seem to be able to compute the speed of given objects. For instance: This is a very easy problem. Sa+3Sb=l and derive for speed; you don't really...
  47. Charles CL

    Volumetric flow rate of bubble out of the straw

    Homework Statement Imagine that you are blowing air through a straw in a cup of water and the root of the straw was connected through a rectangular box with empty base and every side of the rectangular box was cut into "teeth" shape. Bubbles will come out from the teeth of the rectangular box...
  48. Kate L

    Equation of Continuity - Flow rate through an artery

    I'm really confused by this question, as it is different than the examples we did in class. I've compared my answer with a few classmates and I'm getting a different one, so I'm not sure if I've done it wrong or if they have. I'd really just like to know if I am on the right track! Thank you :)...
  49. L

    What Is the Rate of Energy Transfer for a 0.050T EM Wave?

    Homework Statement It is fairly easy to produce a static magnetic field of 0.050T in the lab. If an EM wave could be produced with maximum magnetic field, Bo = 0.050T a) what would be the rate of energy transfer (W/m2) ? b) what would the corresponding maximum electric field be? Note * Air...
  50. henrco

    What rate does the lift accelerates in the first 5 sec?

    Hi, I'm trying to solve this problem and it's driving me a little crazy. Any help greatly appreciated. Q) A lift travels to the top of a tower through a vertical displacement of 48 m. The total journey takes 17 s. The lift accelerates from rest at a constant rate for the first 5 seconds. Then...
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