What is Drive: Definition and 515 Discussions

A drive-through or drive-thru (a sensational spelling of the word through), is a type of take-out service provided by a business that allows customers to purchase products without leaving their cars. The format was pioneered in the United States in the 1930s by Jordan Martin, but has since spread to other countries. Hillcrest State Bank, Dallas, Texas, installed the first drive-through banking system in America. It was a George Dahl designed building, constructed in the 1920s, across from SMU. The second recorded use of a bank using a drive-up window teller was the Grand National Bank of St. Louis, Missouri in 1930. The drive-up teller allowed only deposits at that time.Orders are generally placed using a microphone and picked up in person at the window. A drive-through is different from a drive-in in several ways - the cars create a line and move in one direction in drive-throughs, and normally do not park, whereas drive-ins allow cars to park next to each other, the food is generally brought to the window by a server, called a carhop, and the customer can remain in the parked car to eat. However, during peak periods, to keep the queue down and avoid traffic flow problems, drive-throughs occasionally switch to an "order at the window, then park in a designated space" model where the customer will receive their food from an attendant when it is ready to be served. This results in a perceived relationship between the two service models.
Drive-throughs have generally replaced drive-ins in popular culture, and are now found in the vast majority of modern American fast-food chains. Sometimes, a store with a drive-through is referred to as a "drive-through", or the term is attached to the service, such as, "drive-through restaurant". or "drive-through bank".
Drive-throughs typically have signs over the drive-through lanes to show customers which lanes are open for business. The types of signage used is usually illuminated so the "open" message can be changed to a "closed" message when the lane is not available.

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  1. durwoodb

    Calculation torque of a drive at the torque arm

    Hey Guys, I'm looking for any help in determining what the estimated torque would be on our mixer. If you know of someone that can help with this please let me know and maybe forward this to them. We are looking for a device (strain gauge) that can display this and we will need to know...
  2. D

    Is the Dual-Stage 4 Grid Ion Drive the Key to Faster Space Travel?

    My post was removed originally about a designed based on this new engine. I don't know what specific forum rule I broke, I read the entire thing. But I am posting a new threat to ask about the validity of this specific technology. I am asking because there seems to be zero media coverage of it...
  3. physicsclaus

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    [Mentor Note -- This thread is a continuation of a previous thread, with the emphasis in this new thread on the programming implementation. Previous thread is here: https://www.physicsforums.com/threads/can-anyone-give-me-the-details-of-creating-a-cat-state-in-circuit-qed.1048821/ ] Hello...
  4. K

    Can a Square Wave Tachometer Drive be Powered by a Sine Waveform?

    I'm a marine engine mechanic, and as engine controls & sensor systems have gotten more complicated with current technology, my shop gets more & more requests for instrumentation & control system repairs. I have a lot of trouble getting technical info from suppliers, so I have been starting to...
  5. core7916

    Help please designing a Piezeoactuator drive circuit

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  6. G

    Can a Magnetohydrodynamic Drive Work Without a Tube?

    Now the designs I've seen involve water flowing through a tube but is a tube really necessary? Can the design simply be turned inside out so that rather than pushing water through a tube a regular ships hull could just pull the vessel through the water?
  7. donblaho

    B Calculating Flywheel Mass and Diameter for Efficient Generator Drive

    Hi guys! I have a real life physical problem. I need to calculate the mass and diameter of a flywheel made of steel to run generator with parameters: 123 kVA - 98 kWe; Frequency 50 Hz, 400 V, Class F M8 - 674 nM. The better question is, how much (kinetic) energy do I have to input into the...
  8. S

    Force required to drive the Trommel

    I have to calculate force required to drive the trommel? I don't know how will i calculate the kinetic coefficient of friction of bearings? can some please guide me?
  9. M

    Is a Single-Wheel Track Drive Effective for a Ford Model A Snowmobile?

    Attached are photos of a Ford Model A snowmobile. The owner wrapped track pieces around the rear wheels, but it does not appear to have a bogie or other track drive system. Does this setup look like it is really effective as a tracked machine?
  10. anorlunda

    Scientists train goldfish to drive a fish-operated vehicle

    I'm speechless. Presumably other PF members won't be. :wink: https://arstechnica.com/science/2022/01/goldfish-can-learn-to-drive-and-navigate-terrestrial-environments/
  11. A

    Klystron beam current, drive frequency, LHC CW example

    First of all I want to ask , do the LHC power klystrons work always in CW or are their frequency shifted to correct for timing of the bunches in the LHC tubes in case something isn't aligned or doesn't that ever happen? Also how do they drive the klystrons at LHC or other CW operation from an...
  12. .Scott

    I Does Time Drive Black Hole Travelers to a Central Singularity?

    Since my understanding of these geometries is wrong, I'll do this in numbered steps - the easier to correct my logic. I think the big problem I have is with the time dimension. There seems to be a presumption that the time vector will drive a falling object into a central singularity. But how...
  13. A

    B Reactionless Drive Using Light Bouncing Off Moving Mirrors

    Here is a concept suggesting reactionless drive: Setup: A light pulse of wavelength l0 bouncing between 2 mirrors one on the left - ML and one on the right - MR. Each mirror oscillates perpendicularly to light travel direction attaining relativistic speeds vl, vr. Light pulse is timed so it...
  14. T

    Unknown USB Device (Device Descriptor Request Failed) No Drive Letter

    Problem: Tablet is not detectable by computers. Yet... it is noted as "Unknown USB Device (Device Descriptor Request Failed)" in the device manager under Universal Serial Bus controllers. I have already done the basic 30 articles reading and tried the standard suggestions including: Try a...
  15. R

    B MEGA Drive: Jim Woodward's Propulsion System, Real or Fiction?

    Is Jim Woodward's MEGA drive (https://www.nasa.gov/directorates/spacetech/niac/2018_Phase_I_Phase_II/Mach_Effect_for_In_Space_Propulsion_Interstellar_Mission/) likely to be for real? It seems to violate conservation of momentum. If it does how does it get away with it?
  16. D

    Warp Drive = Artificial Gravity?

    I had a bit of a brainwave regarding artificial gravity (outside of rotation or linear acceleration). As we know "gravity plating" is just a plot device to allow sci-fi films and shows to escape the pain of having to accurately recreate a zero-g environment. But then I thought: gravity is a...
  17. T

    How to calculate the capacity of a disk drive

    Good morning, I got a question like this- "A hard drive has 6 platters, each platter records data on both sides. There are 3000 tracks of nine sectors each. Each sector stores 512 bytes of data. How many read/ write heads are there and what are the capacity of the drive(in Gigabytes)?" I...
  18. S

    B Can We Create a Warp Drive for Light? - Josh's Curiousity

    Hello everyone, Preface: I'm hoping this doesn't violate the speculative or personal theories clause in the forum guidelines. It's really just a curiosity, I'm in no position to argue/develop/push the idea or anything. If this does violate that clause, would you be able to recommend a similar...
  19. MoistOxi

    NASA My rough idea on a near light drive

    Please add too this idea.
  20. T

    I Alcubierre Warp Drive: Spacetime Diagram Explained

    https://scipost.org/SciPostPhysLectNotes.10/pdf "Space expands behind the warp bubble and contracts in front of it, thus pushing the bubble forward at velocity v. The ship, which is at rest inside the bubble, moves along with the bubble at an arbitrarily large global velocity." If the ship...
  21. Mary Conrads Sanburn

    COVID-19: The Path Forward - How the Science Will Drive Recovery

    COVID-19: The Path Forward - How the Science Will Drive Recovery https://www.youtube.com/results?search_query=Covid-19-The+Path+Forward-How+the+Science+will+Drive+Recovery
  22. R

    Force required to drive a fence post into soil

    Homework Statement:: what force is required to drive a 6ft(1.8 m) 4 inch (100 mm) post 2 ft into the ground? I'm wondering how different soils affect driving ability and where I could find information on soil resistive force. A 20 ton hydraulic tractor mounted cylinder is used to press the...
  23. G

    I Alcubierre Drive & Gravitational Waves: Alien Effects?

    Suppose some aliens travel to our solar system after seeing our radio broadcasts using an Alcubierre drive. Would it not create a notable gravitational disturbance? Or does it leave spacetime undisturbed around it?
  24. J

    A Latest Warp Drive Research: Examining Chronology Protection Conjecture

    I had some questions about some recently published results on the theoretical aspects of warp-drive. Does the content of the research of Alexey Bobrick, and Gianni Martire proposed in their paper describing their ideas for a warp drive and published in IOP's Classical and Quantum Gravity lead...
  25. Chriz3223

    Questions about DC motor drive calculations

    Hi Physics! And again, thanks for the membership! I’m about to build a robot just with some old parts I have. The main thing is the motors. I have 2 DC Motors Specs below. (It’s a MFA975D Series with gear ratio 49:1) Operation range(Voltage): 12V No load = 147RPM Nm = 1,8 Stall Torque =...
  26. H

    Friction Drive Bicycle -- Required Torque

    Hi, I am working on a project regarding the friction drive on bicycles. I would like to design an assembly which has to be compact enough, and has to be able to produce torque that will move the bicycle from a stationary position, but as it turns out with my calculations torque required is...
  27. S

    MHB Calculating Distance Traveled: Solving for the Unknown in a Multi-Unit Problem

    My problem. Amanda took an 8 hour drive. The return trip home took 5 hours and was 21% faster. How many miles did she drive?
  28. Jarvis323

    Moving through Air, Dust, and Solid Objects with Warp Drive

    What would happen if you tried to fly through obstacles using warp drive? Distorting space so that two points are closer wouldn't get around the fact that there might be obstacles (e.g. air molecules, space dust, empire destroyers) that you would bump into along the way right. Would all of that...
  29. PhysicsTest

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    I am referring to the application note from TI, the below is the power bridge circuit. The truth table is as below a. I try the first values of A=0, B=0, C=0 the circuit would then become like this according to me It is open above point O, then how the voltage of ##\frac{-V_{DC}} 2## will be...
  30. anorlunda

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    Today is not a good day. @Wrichik Basu can't boot his Windows PC. Today my Chromebook said "Can't find ChromeOS ..." and won't boot. :H Following Google's instructions, I made a recovery device on a USB thumb drive using another computer. The recovery failed; it must be a real...
  31. phinds

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    I used to know all about the FAT file structure and sectors and clusters and stuff but have forgotten it all. I was shocked to find that the new 5TB external HD I bought takes 1Meg to store a 1Kb file (and any file less than 1Meg). Is this standard on drives over 4TB ? Is there some other more...
  32. PainterGuy

    Finding the position of a differential drive robot

    Data: The speed of right wheel is considered to be 25 RPM. The speed of left wheel is considered to be 20 RPM. The distance, L, between wheels is 30 cm. Also the radius, r, of each wheel is 6 cm. Question: Using the data above for a differential robot, find the following: i: angular...
  33. J

    Momentum conversion drive possible ?

    Hello! Would it be possible to brake a magnet by means of short circuiting a coil placed at the end of a plastic tube where the magnet has been accelerated in ? Is there a conversion of magnet speed to electric current/energy inside the braking coil ? It is thaught for reusing the projectile...
  34. iVenky

    Automotive Engine mechanisms during coasting (in drive mode) and engine braking

    I am trying to understand what happens in the engine (especially gasoline vehicles) during coasting (in drive mode) and engine braking. It looks like both mechanisms shut off the fuel injectors. Then how is the former (coasting in drive mode) able to use the momentum while the latter (engine...
  35. nomadreid

    NASA NASA connection to EM drive research

    The following is a five-year-old post on one of NASA's websites. https://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/?fbclid=IwAR02ifoAVrPGa0StAxsTjIuS3b08fUOyMcPh1-nBjeiwgwWkI3H7jnA0Has It exposes the holes in the state of affairs at that moment -- first, the article...
  36. S

    Need a compact linear drive for a hexapod table

    Hello everyone, I'm trying to make a hexapod table, in the same style as this: but I am trying to overcome the main flaw with this design - the minimum height being so high. My goal is to produce something which someone can stand on, in their home. It needs to become as flat as possible, and...
  37. fRod57

    Use of hard drive magnets to build an MHD propulsion ship

    In order to build a small mhd propulsion ship for a physics project, I'm wondering if the magnets we find in hard drives carry enough magnetic field power to function in such an experiment.
  38. P

    Build a Shaker Screen Box: Source Eccentric Drive Gears

    I am hoping to build a shaker screen box, to sort sand from gravel and rocks. Want to use an eccentric drive gear to move the screen creating a vibration that would shift sand through screen mesh and over size rock wold flow off top of screen. Have not been able to find a source of eccentric...
  39. M

    MHB How to Drive Tariff from two VARIABLES?

    Hello Everyone, I need your assistance here with the owing problem and I'm sure someoen will help me. :) I've trucking rates which are based on fixed kilos - the range starts from 50 kilos to 5000 kilos. Condition is whatever the volume of the cargo is we have to multiply it with 200 and...
  40. weilam06

    Work done by an electric motor to drive elevator

    https://www.physicsforums.com/attachments/250022 For the part (a), set the tension of the string that pulls the elevator be ##T_1## and the tension that pushes the counterweight be ##T_2##. Then we have the following equations: $$T_1−1200g=1200 \cdot 1.5$$ $$1000g−T_2=1000 \cdot (−1.5)$$ where...
  41. DEvens

    A Alcubierre Warp Drive: Intro Paper for GR Students

    I would like to read about the Alcubierre warp drive. Is there a good introductory paper? I have done some GR, round about 8 months worth in undergrad [mumble] years ago. And my honors project was on interior solutions for stellar collapse. So I'm OK with GR at about the speed of Weinberg's...
  42. amare

    Troubleshooting Corrupted Audio Files When the C Drive is Low on Space

    When the C drive gets limited in space, I take some space from the D drive and the audio files in D drive corrupted and can not open. How do I open these files?
  43. S

    I Is the Alcubierre Warp Drive possible?

    This Quora post seems to say that this type of warp drive could allow faster-than-light travel, but somehow I think this is junk science: https://www.quora.com/Will-humans-eventually-be-able-to-explore-the-galaxy-After-all-it-is-multiple-light-years-away-to-even-the-nearest-star (author is...
  44. L

    Maximum Angle of Incline for four wheel drive

    I think it will be between 11 and 12 degrees but don't know how to re-arrange the equation or if I was even using the correct method
  45. M

    Power to drive rollers in a machine

    Hi, I've attempted to solve the first part (see file Position 1) in mathcad, but have no idea if it's correct, at least for the first part, as I am assuming, that the steps will be the same for the rollers in the remaining positions. So if I can manage to calculate the first one correctly, I...
  46. S

    Automotive Mechanism to drive a wheel from an internal motor allowing suspension?

    I'm brainstorming how to make an electric motorbike, making as much use of the available space as possible to allow for as many batteries to be fitted as possible. Batteries aren't relevant right now; my focus is on the final drive at the back of the bike. To maximise space, I want to fit the...
  47. A

    Most efficient way to drive an electric car and why?

    Hello, I wanted to get a physics analysis of the best way to drive an electric car for maximum range. For example, would it be more efficient to drive on side streets at a slower speed of say 30 mph, or would it be better to get on the freeway and drive 60. Should I be accelerating as slowly as...
  48. M

    Stepper torque calculation to drive a solid cylinder

    Hi All, I'm working on some design and apparently my physics expertise are getting rusty,i'd appreciate some help with the following:- I need to calculate the required torque for a stepper motor to rotate a solid cylinder with the following properties:- radius : 20cm height: 12cm density : the...
  49. C

    Automotive Front Wheel Drive or Rear Wheel Drive has higher maximum slip ratio?

    The graph is relationship between longitudinal force and slip ratio under the conditions of 0 longitudinal acceleration and flat road(0 angle of inclination). Which line represent FWD or RWD? Does FWD or RWD have higher maximum slip ratio?
  50. noxidINF

    Motor drive a coil in a magnetic field to power itself?

    Hello Friends, I have been wondering, is it possible to construct a motor, and attach a coil to it, such that with the motion due to the rotation of the motor, it generates a excess of energy that can be used to power the motor in turn, basically, could i use the excess to charge a battery that...