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. F

    Optimal Sampling Rate for Spectrum Replication: Expert Homework Help

    Homework Statement In some cases, the spectrum replication property of sampling can be used as a substitute for demodulation. Given a signal xa(t) with the spectrum shown, what is the lowest sampling rate that will ensure both no aliasing of the spectrum, and that one of the spectrum replicas...
  2. R

    Rate of gas leakage through small hole

    Homework Statement Here http://imgur.com/a/4LRM6 2. Homework Equations The equation is given int he questionThe Attempt at a Solution gas will stop flowing when the pressure inside the gas is equal to that of the surroundings. I calculated the final mass of gas inside the cube. Then i...
  3. H

    Energy Transfer and rate equation

    What is the unit for energy transfer rate constant? I am confused because of the order of reaction of energy transfer. Consider the case for following energy transfer A* + C → A + C*. The star represent excited state. Then the rate equation for A* would be as follows: \frac{d[A^{*}]}{dt} =...
  4. K

    I Pressurization rate vs. Mass Flow rate

    Good afternoon all, I am doing some back of napkin calcs for work and am having trouble finding an answer (or one that I can understand--its been a while since undergrad). We have a valve that has particular flow rate requirements to prevent unseating the valve seal. This is a mass flow rate...
  5. T

    Calculating mass flow rate while assuming shock losses

    Below is a 2 part question regarding gravitational pipe flow, I have managed to do Q1) and have got an answer of 144 kg/s. However Q2 asks that shock losses be considered, Although I know how to calculate the shock pressure loss I am unsure of how to apply this to my calculation to get a new...
  6. K

    Finding acid dissociation rate constant from titration

    Homework Statement When a weak acid HA is titrated 75% of its endpoint, it has a pH of 5.25. Calculate its Ka. Homework Equations Ka = [H+ ][A- ]/[HA] [H+] = 10^-pH The Attempt at a Solution I found [H+ ] from the pH to be 10^-5.25 M. From the dissociation equation of HA, we know there is a...
  7. M

    Reclaimed Oil Line Same Return Rate

    I am re-piping a oil line use for burning reclaimed oil and currently the oil returns to the tanks to the bottom of the tanks. I want to have them return to the top of the tanks to increase the mixing of the oil. My only problem is that their are two tanks that will fill up by the same oil line...
  8. PhotonKing

    I Spherical Accretion Mass inflow Rate

    Hello everyone I am a new user around here. I have been attempting to understand spherical accretion and create a simple model of that process but I am running into a problem. This is getting at the heart of the issue. So far I have come up with two concentric spheres, the outer sphere is the...
  9. U

    A Calculating the ionization rate in the Interstellar medium?

    I hope putting this in the high energy section is the right section (if not, please let me know which would be more appropriate!) I felt this was appropriate since the work I am doing is high energy astrophysics. So I'm doing some research this summer, and my tasks were to take some data...
  10. T

    Elementary reaction's order of reaction

    According to textbook, elementary reactions have an order of reaction equal to the summation of the stoichiometric coefficients. why is this so? And there is another problem, we can balance an equation in different ways and get different stoichiometric coefficient sets, for rates, which set is...
  11. A

    How Does Wheel Speed Affect Turning Rate in Dual-Wheel Drive Vehicles?

    I am an electrical engineering junior and i am helping some freshmen in a project They are supposed to build a racing car They don't want to use servo motors for the turning mechanism. They want to use the same mechanism the Segway uses, turn one wheel faster then the other, so i wanted to know...
  12. JK Gowdham

    Calculation of mass flow rate of 50MW

    Hi i have calculated compressor , combustor , turbine inlet and outlet temperature , pressure so on and my output of gas turbine is 50MW , So for this i want to calculate the mass flow rate of air and fuel in compressor , combustor , turbine . Like m0=?,m1=?fan inlet,m2=? compressor inlet,m3=...
  13. alaa amed

    Average rate of change of the area of the triangle?

    Homework Statement An object is moving around the unit circle with parametric equations x(t)=cos(t), y(t)=sin(t), so it's location at time t is P(t)=(cos(t),sin(t)) . Assume 0 < t < π/2. At a given time t, the tangent line to the unit circle at the position P(t) will determine a right triangle...
  14. E

    A Calculate neutron dose rate from a reactor to an object

    So, I'd like to calculate the dose rate to an object, say 1g of quartz (SiO2) placed into a research reactor neutron flux. The average kinetic energy of research reactor neutrons is 2 MeV but individual neutron energies vary dramatically. Say the thermal neutron flux is 1E13 n/cm2/sec and the...
  15. U

    A Ionization Rate for Cosmic Rays, given the CR spectrum

    Hi all, so I am working on a presentation. What I have done so far was to calculate the cosmic ray spectrum (so given some data from Voyager 1 and PAMELA, I found the intensity as a function of the energy, in units of m^-2 (sr s MeV)^-1. Given this function, which is essentially J =...
  16. sehrish shakir

    Flow Rate Calculation: Get Help Solving

    hello! i was provided by the radii from 0 to 5 cm and a parabolic profile is also given .. in numeric form i was asked to calculate the flow rate how to understand it to solve further kindly help ...
  17. S

    Calculating flow rate through turbine

    Hi guys, First post on this forum. Greetings from the Netherlands :) I am currently in the process of designing a turbine used in locks in several canals. The turbine is powered when the lock chamber is being emptyed during the lockage. The goal is to calculate the water level in the lock...
  18. Z

    What Is the Average Reading Rate for Beth's Day?

    In the afternoon, Beth read 100 pages at the rate of 60 pages per hour; in the evening, when she was tired , she read another 100 pages at the rate of 40 pages per hour. What was her avg rate of reading for the day? I can't understand why are we not finding avg time? Homework Equations S= v *...
  19. H

    MHB Integral question about depreciation rate in percentage.

    This is my first time tackling this kind of problem. 1. Let $Q$ be the percentage of what he remembers. 2. Let $t$ be the time in weeks. 3. Initial condition 1: $Q=0.95 $ and $t=0$ 5. Initial condition 2: $Q=0.80 $ and $t=1$ Now I'm stuck about finding the rate. From what I understand...
  20. N

    MHB Work Rate Problem: 4 Men, 9 Women in 13.388 Days

    If 18 men or 20 women can do a work in 9 days, in what time can 4 men and 9 men do the same work? My attempt D = days required 4/162 + 9/180 = 1/D D = 13.388 days Is my solution correct? Thanks!
  21. S

    MHB Formula Using Retention Rate - Am I thinking this through correctly?

    I need help making sure I am doing this right... I am trying to solve for the total Lifetime Value of a member where I deduct their initial order from the total. Variables: A = # of members B = 42% retention rate C = \$750 lifetime spend D = \$48 initial order Total Lifetime Value = ABC -...
  22. Erenjaeger

    I Rate of Supernovae in the Milky Way Galaxy: Scientists' Best Estimate

    Which option is closest to scientists' current best estimate for the rate at which a supernova explosions occur somewhere in the milky way galaxy? a) once a day b) once a year c) once every hundred years d) once every thousand years From what I have found online, the current estimate is one...
  23. paulmdrdo

    Word problem about distance, rate and time

    Homework Statement Homework Equations D = rt The Attempt at a Solution I let d to be the total distance d/3a = t1 ----- time taken for 1st part of the trip d/3b = t2 ----- time taken for 2nd part of the trip d/3c = t3 ------ time taken for the whole trip with uniform speed Since t1+t2...
  24. A

    Acetone and Petrol- Evaporation Rate

    < Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown > Need a bit of help here: Which has higher rate of evaporation :- Acetone or Petrol?
  25. N

    MHB Solve Work Rate Problem: 6 Men Colouring 36m Cloth in x Days

    if 4 men can colour 48 m of cloth in 2 days, in how many days can 6 men colour a 36 m cloth? Can you give me a general method on solving this problem? Thanks!
  26. O

    Why Does Compound C Exhibit a Higher Rate of Solvolysis Than Compound D?

    Among the following compounds I think D compound has more rate of solvolysis in 50% aq.ethanol at 45°C than compound C . Due to more resonance. But the compound C has more rate . Why?
  27. A

    How can I calculate flow rate for leaking pressure vessel during maintenance?

    I work in the oil and gas industry and frequently encounter an issue involving isolation valves that do not seal 100%, and that begs me to ask the following question... I often need to isolate particular sections of piping so that a segment can be opened/disassembled for maintenance. When I...
  28. A

    I Calculate Liquid Flow Rate in Isolated Pipes

    Hello, my first post here. I encounter a situation frequently at work that I'd like help with so here it is... When I isolate a particular section of pipe (by closing valves), I then bleed off the pressure in the isolated section (volume of isolated pipe varies from 3 cubic meters up to about...
  29. A

    How Can I Increase My Lawn Sprinkler System's Flow Rate?

    I have a DIY project for a lawn sprinkler system but my flow rate is insufficient : if my setup is to work properly, the sprinkler manufacturer suggests a flow rate of 2880 litres per hour at a pressure no less than 2 psi. I measured the flow rate of my current garden faucet, which is connected...
  30. N

    Calculating the boil-off rate of liquid helium

    Homework Statement An aluminum rod 0.500 m in length and with a cross-sectional area of 2.60 cm2 is inserted into a thermally insulated vessel containing liquid helium at 4.20 K. The rod is initially at340 K. (Aluminum has thermal conductivity of 3,100 W/m · K at 4.20 K; ignore its temperature...
  31. A

    Fall Rate of Objects: Explaining Why Weight Matters

    Hello - I have a question from a CSET practice exam that I'm having trouble understanding the provided answer. Q Two items are dropped simultaneously from a ten-story building. The items are shaped similarly and are relatively the same weight. Which of the following statements is correct...
  32. T

    Zero-Divergence of Rate of Change of Magnetic Flux

    Let's introduce a time-varying scalar field ρ(x,y,z,t) [charge density] and vector field J(x,y,z,t) [current density] Assuming the system follows Maxwell's equations, what must both fields satisfy such that ##∇⋅(\frac{∂B}{∂t})=0## ?
  33. E

    Rate of continuous creation

    Question: Estimate the rate of continuous creation required to keep the density of the universe constant at 10-26kg/m3. Express your answer in protons/year/km3. Attempt: Assuming a spherical matter-dominated Friedmann universe, we know from solving the fluid equation that ρ ∝ 1/a3 (where ρ is...
  34. F

    Calculating Oil Flow Rate in Cast Iron Pipe

    Homework Statement calculate the flow rate at which oil (kinematic viscocity = (10^-6) (m^2) /s ) flow thru a cast iron pipe 100mm diameter and 115 m long under head difference of 5m Homework EquationsThe Attempt at a Solution hf = 32μLV / ρg(D^2) how to get the value of μ( dynamic viscosity)...
  35. S

    Volume flow rate variation of a free air jet

    Hi, I recently did an experiment whereby we investigated the velocity distribution of air expelled from a round nozzle whose diameter, D, was 30mm. We have been asked to calculate the volume flow rate at distances of 2D, 6D and 10D along the centreline. We found the flow rates to INCREASE...
  36. A

    Linear algebra or intro to programming courses have higher failure rate?

    which has higher failure rate: linear algebra or intro to programming. I understand failure rate might be skewed: math majors, who are gifted and interested in math, are required to take linear algebra but not intro to programming, while CS majors are required to take both. Which class do CS...
  37. Basimalasi

    I Energy needed for achieving this mass flow rate for a rocket

    Hey, Suppose you have an enclosed vessel that is full of water. You heat it up then you open a valve, and that will create enough thrust for it to act as a rocket. How much energy is needed for a steam rocket to get heated enough to achieve a mass flow rate of 2430 Kg/s. Mass of water= 256...
  38. C

    Rate body temperature increases given rate of heat transfer?

    Homework Statement Suppose you walk into a sauna that has an ambient temperature of 57.0°C. Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0°C, the emissivity of skin is 0.95, and the surface area of your body is 1.60 m2. I solved this first part and...
  39. Nemo1

    MHB Surface area of sphere increase at a constant rate

    Hi Community, I have this tutorial question. When I look at the first question (a) I think it is FALSE as the surface area would not increase at the same rate as the radius. For the second question I am not sure if I am interpreting it correctly. If r=\sqrt{\frac{Ct}{4\varPi}+2} where Ct is...
  40. P

    Rate of Increase in Water Level Due to Falling Cone in Cylinder

    Homework Statement A cylinder of radius ##{R}## is partially filled with water. There is an inverted cone of cone angle 90° and base radius ##{\frac{R}{2}}## which is falling in it with a constant speed ##v=30~cm/s##. Find the rate of increase of water level (in ##cm/s##) when half the...
  41. I

    Cooling/heating temperature rate change

    Ok, so I could do an experiment on this first, but I decided to see if anyone knew beforehand. So basically my question is will different properties of the same temperature, exposed to the same temperature, cool/heat at the same rate? For example would a more viscous liquid cool as fast as...
  42. kiwaho

    I How many barns above could make nuclear reaction rate 100%?

    All guys know the importance of cross section. In a sense, it stands for the possibility of a reaction. I am wondering how many barns above could make nuclear reaction rate almost 100%? Generally speaking, the cross section can span a couple of decades order of magnitude, e.g. 10^-10 to 10^6...
  43. F

    What is the Correct Equation for Flow Rate?

    Homework Statement the equation of flow aret given is [(pi)((r_o)^4 ) / 8μ ] [-d/ds (ρ +yz ) ] , but the ans that i got is - [(pi)((r_o)^4 ) / 8μ ] [-d/ds (ρ +yz ) ] , what's wrong with my working ? Homework EquationsThe Attempt at a Solution
  44. S

    Calculate boiling rate of water

    How would I calculate the rate that water would boil off? I've done a lot of looking into and found an equation but it doesn't seem quite right. What I found states that the KJ/h delivered to the water divided by the latent heat energy gives you the amount of water that will boil off. I tried...
  45. Dopplershift

    I Determining the Rate at Which Functions approach Infinity

    With basic fractions, the limits of 1/x as x approaches infinity or zero is easily determine: For example, \begin{equation} \lim_{x\to\infty} \frac{1}{x} = 0 \end{equation} \begin{equation} \lim_{x\to 0} \frac{1}{x} = \infty \end{equation} But, we with a operation like ##\frac{f(x)}{g(x)}##...
  46. J

    The Pressure Distribution in a Narrowing Tube with Increasing Fluid Velocity

    Homework Statement Question: For a fluid flowing within a horizontal tube, if the diameter of the tube narrows, will the fluid's flow rate increase, resulting in increased pressure in the narrowing and explain your reasoning. Homework Equations Volume flow rate = volume/time Volume = Area x...
  47. K

    B Rate of Force Development in athletes

    Hey I am a 15 year old basketball player looking to dunk a basketball on a 10 foot regulation rim. I'm 6'1", 180 lbs, and I can squat 380 lbs full depth. I think the reason I can't jump high is because I have a slow ROFD. Power= Force/Time Power=Force x Speed of Force Application. This is...
  48. Max KL

    What is the needed flow rate of the impeller with this info?

    Hi everyone! As an experiment I am trying to calculate building my own PWC similar to a jetski assuming it is for sea level use. I really appreciate all detailed answers as I want to understand. The impeller will be installed under rear of craft, engine is mounted on top. Given Information...
  49. S

    Bernoulli's equation to find the flow rate

    Homework Statement " A horizontal water pipe has a radius of 10 cm and a pressure of 8*10^4 Pa at one end. At the other end the radius is 5 cm and the pressure is 6*10^4 Pa. What is the water flow rate through this pipe? Homework Equations P1 + 0.5 * ρ * v1^2 + h1ρg = P2 + 0.5 * ρ * v2^2 +...
  50. F

    Is Flow Rate in Open Channels Affected by Backpressure?

    Homework Statement I was told that the flow rate in open system at 2 points in the pipe system are not the same, is it true?? Homework EquationsThe Attempt at a Solution
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