What is Applied: Definition and 1000 Discussions

Applied science is the use of the scientific method and knowledge obtained via conclusions from the method to attain practical goals. It includes a broad range of disciplines such as engineering and medicine. Applied science is often contrasted with basic science, which is focused on advancing scientific theories and laws that explain and predict events in the natural world.
Applied science can also apply formal science, such as statistics and probability theory, as in epidemiology. Genetic epidemiology is an applied science applying both biological and statistical methods.

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  1. LCSphysicist

    Finding the Force Applied by a Support on a Falling Chain

    A chain with length L and mass density σ kg/m is held in the position shown in Fig. 5.28, with one end attached to a support. Assume that only a negligible length of the chain starts out below the support. The chain is released. Find the force that the support applies to the chain, as a function...
  2. M

    Deflection of a cantilever beam with applied tension at the free end

    Not much to add since the question is fairly simple, but again I'm wondering if applying tension at the free end of a cantilever beam affects the deflection it would have if only itself weight is considered. Intuitively, tension should tend to straighten the beam, and if it does, how to...
  3. Haorong Wu

    I Could Planck-Einstein relation be applied to matter waves?

    My friend gave me some statements which are wrong, but I could not tell why they are wrong. He wrote, Since ##\omega = \frac E \hbar = \frac {\hbar k^2} {2m} = k v##, then##p=\hbar k =2mv##. I guess that ##E =\hbar \omega## may only appied to photons, not matter waves. Is that correct?
  4. McLaren50

    Understanding the deflection of a cable under tension with a force applied in the middle

    With the above in mind, I have a cable of E=60GPa, cross sectional area 7e-4m^2. I want to understand the relationship between the tension applied resisting the deflection of the cable when a force is applied so that the cable will not deflect more than 0.7m in this case. Take the force as...
  5. JD_PM

    A Understanding Cartan subalgebra applied to the n-harmonic oscillator

    I was studying the ##n##-dimensional harmonic oscillator, whose Hamiltonian is $$\hat H = \sum_{j=1}^{n} \Big( \frac{1}{2m} \hat p_j^2 + \frac{\omega^2 m}{2} \hat q_j^2 \Big)$$ The ladder operators are $$a_{\pm} = \frac{1}{\sqrt{2 \hbar m \omega}} ( \mp ip + m \omega q)$$ And came across an...
  6. Sokolov

    Maximum voltage that can be applied to DC circuit with resistors

    I see that ##V_{ac}=V_{ab}+V_{bc}##, with ##V_{ab}=I_1R_1=I_2R_2## and ##V_{bc}=I_3R_3##. However, I don't see how to express mathematically the maximum value of ##V_{ac}##. Could someone please help me with this task?
  7. SEYED2001

    I Relativistic energy equation applied to a double-slit experiment

    My question: How do the values for the velocity, momentum and energy of an electron in a double-slit experiment are altered by the observation? Probably,energy is altered. Given that energy is a function of momentum and velocity, either or both of these must have been changed. However, I am...
  8. Captain Kneecaps

    Programs Pure maths or applied maths as a second major to physics

    I am currently in my second year of studying a bachelor in physics and applied maths. My aim is to one day do research in physics. I am particularly interested in subjects such as gauge theories, AdS/CFT and gravity. My question is whether it would be more beneficial to switch from studying...
  9. A

    Opposing force of the axle when a torque is applied to a wheel?

    Okay let's say we have a wheel attached to a fixed axle, free to spin, ignore friction and we apply a force on the edge of the wheel. That force creates a torque, does the axle have an opposing force to keep the wheel/axle assembly from accelerating linearly? Ive learned on this forum that when...
  10. ryl3gol

    Math Job search ideas for an applied math major?

    I am an applied math major. What are some jobs you would recommend looking in to? Thank you in advance!
  11. bonbena

    Schools Interested in Applied Math/biomath REU's, need some help if possible

    I am a 4th year junior studying applied statistics and am highly interested in pursuing a graduate degree in mathematical biology, and would like to do an reu this coming summer. The problem is, I got severely sick my second year of college and my gpa as a result dipped significantly from the...
  12. F

    Inverted pendulum -- What force is applied at the center of mass?

    Summary: I know that in order to keep inverted pendulum balanced when it leans forward, I should accelerate the bottom of it, but what is the force which is applied to center of mass of the pendulum with balances torque due to gravity? Is it inertial force? We assume that our inverted pendulum...
  13. melissafern

    Find the forces applied to a rotating level

    Homework Statement: Solve parametrically the system with g, load cell measurements and know accelerations. Homework Equations: to be found Consider that we know angles tetha(t) of a mass-less link rotating about its centerr O. - so we also have velocities and accelerations - and values of...
  14. A

    Best Applied Physics Books: Get Expert Advice & Recommendations

    What are best applied physics books I have downloaded one that doesn't even talk about it Please help
  15. sebastian281172

    Pressure applied to the ground by a man standing on stilts

    Homework Statement: How much pressure is applied to the ground by a 52 kg man who is standing on square stilts that measure 0.06 m on each edge? Homework Equations: p=(F/A) P = (F/A) = (52*9.81)/(.06^2) = 207100
  16. KaitD

    How to Apply Bernoulli's Equation to Solve Fluid Hydraulic Homework Problems

    Summary: Currently having issue with fluid hydraulic homework. Only put down Bernoulli’s equation on my paper [Moderator: moved from a technical forum, no template.]
  17. Like Tony Stark

    Forces applied by a slot on a slider

    What forces are exerted by the slot on the slider? You have a normal force since it's inside it, and that's the only force that I can imagine. But then? I think about the pseudo-forces since it's on a rotating reference frame (centrifugal force, Coriolis force, Euler force), but those forces are...
  18. Buzz Bloom

    I Can Lagrangian mechanics be applied to motion in an expanding universe

    Summary: Since L = T - V, and T equals the kinetic energy (KE) of a particle whose trajectory is to be calculated, how is KE defined since some of its motion will be due to the expanding universe? My understanding may well be wrong, but it is the following. if a particle is stationary at...
  19. haushofer

    "Lesson study"-method applied to high school physics

    Dear all, for my education as a physics teacher (Dutch high school, ages 14-17) I have to make a didactical assignment. This assignment consists of applying the so-called "lesson study" method, see e.g. https://tdtrust.org/what-is-lesson-study https://www.uwlax.edu/sotl/lsp/index2.htm My...
  20. grandpa2390

    Other How should I tailor my Master's in Applied Physics

    so at this point, my interest in going back for a master's degree (my bachelor is in physics), is because I just want to find a job. But this time I want to be smarter about it than I was the first time around. I want to go in with a plan. When I'm working on my Applied Physics degree, I can get...
  21. GeneralKnoxx343

    Engineering Applied Physics, Engineering or something else?

    Howdy! A little background info: I am a soon-to-be high school graduate from an eastern european country (Romania). Since things are not so good as far as higher education is concerned in my country, I am looking into going to study abroad, specifically in Holland. However, I have a very hard...
  22. nmsurobert

    Boyle's Law and Applied pressure

    When using a Boyle's Law Apparatus, pressure applied to the plunger can be calculated by knowing the mass of the object on the plunger and the area of the plunger. P = F/A. The change of pressure inside the cylinder can be calculated using Boyles Law, P1V1 = P2V2 Should the value for the...
  23. TheBigDig

    Derive an expression for the applied field of a superconducting wire

    So far the best I've been able to come up with is to use ##\vec{B} = \mu_0 \vec{H}## which gives me i_c = H 2\pi r j_c = \frac{H 2\pi r}{\pi r^2} = \frac{2H}{r} \therefore B = \mu_0 \frac{r j_c}{2} I'm fairly confident this is just terrible math and physics on my behalf but I'm struggling to...
  24. Zahid Iftikhar

    Why does a capacitor charge to 63% of the applied voltage?

    Statement of problem is given in the summary. Mathematics proves time constant is calculated from the equation V= V0 exp t/RC I want to know if there is any physical explanation of this effect. Please guide me on this. Regards
  25. A

    What books should I read to learn applied physics?

    Summary: What books should I read to learn applied physics? If I want to study applied physics What books should I read ? What are the topics?
  26. A

    Newton’s Second Law applied: F=ma

    My attempt at solving this written out with random inputs Block A- F(100)=M(10)A(10) Block B- F(200)= M(15) A A=200/15 = 13.33 This was not in line with options.. which were 4x block A (1/4) block A Equal to block A (1/2) block A 2x block A Much appreciated some help as I am a beginner
  27. T

    Programs Experimental physics, applied math, or both?

    Hey all, So I'm about to be a senior at a US school, and likely want to do grad school. I'm posting here because my interests are really sort of disparate and don't really share a theme. I like dynamics, stat mech, doing stuff on computers, and doing stuff with my hands... Anyway, here's a...
  28. A

    Physics Applied physicist, summer internship - panicking

    I am about to commence a 3 month summer internship as an applied physicist. The job role involves working within the R&D department performing on the bench experimentation involving optical and electromagnetic sensing and analysis using python. Having finished my University exams on June the...
  29. C

    A QM Interpretations as applied to QFT

    [Moderator's Note: Thread spun off from previous discussion.] MWI and the TSVF are both easily generalized to QFT. One only needs to define the decoherence basis for the fields (see https://arxiv.org/abs/quant-ph/9510021) and then one simply interprets the decoherent histories as ontological...
  30. pahizix

    Admissions Do I have a strong enough profile for applied math grad school?

    Hi All, I just completed a degree in physics and (pure) math and I am planning on applying to grad school in the fall. I'm mostly interested in applying to physics graduate programs, but I was wondering if my background was strong enough to the following applied math programs: Stony Brook...
  31. F

    Where is the tension applied in a 3 dimensional cable?

    Hello, I need to transmit motion between a servo motor and a pulley through a cable. In order to do that, I've screwed a pulley to the servo and fix the cable on both the motor pulley and the pulley. I am working in a scale where the radius of the cable cannot be neglected due to a precision...
  32. Shackleford

    PhD in Applied Mathematics - Finite Element Analysis

    My background is BS Math with Physics minor (3.5) and MA Math (3.7) from the University of Houston. My current plan is to explore the necessary background for doing research in finite element analysis. Over the next few semesters, I plan to take Numerical Methods for PDEs, Statistical Computing...
  33. L

    Why do things produce sound even though no pressure is applied to them?

    I understand that sound is a propagating pressure through a medium. We produced pressure and it’ll propagate through the medium as “sound”. How can we use this model to understand everyday-life experiences like opening a chips packaging and the packaging makes a sound, and alike. In the chips...
  34. M

    Load applied at an angle -- how much force before breaking this die?

    Hello, I was toying around with shapes and dies and wanted to calculate the load distribution in all spots so to get a rough idea of the maximum load I can use before breaking the die. The "problem" is as follows: I have a die shaped like a trapezium and I have to press an item (5-10mm thick)...
  35. T

    Undergraduate physics to graduate Applied mathematics

    I am an undergrad in physics and math (pure). I want to do msc in Applied mathematics . There are few things that worry me : 1. Topology, complex analysis, differential equations, calculus, Probability, 3 Analysis and 3 Algebra - these are roughly my courses. I didn’t take any “applied” kind of...
  36. T

    Force applied to lever arm to twist foot pound torque

    If i need 1000 foot pound torque of 1000 foot pounds twisted very easily How long should the lever arm be and and how much force at the end of lever arm is required ? Tony Singh
  37. Miles123K

    Force and power applied to create a traveling wave

    Again I am really confused, but I just put the traveling wave as: ##\psi(x,t) = Dcos(kx- \omega t)## for positive x ##\psi(x,t) = Dcos(kx+ \omega t)## for positive x Then I simply differentiated and plugged in ##x=0## ##F(t) = - T D k sin(\omega t)## and from this ## \langle P \rangle = T D^2 k...
  38. X

    Calculate the maximum voltage that can be applied

    Homework Statement A detector of radiation called a Geiger-Muller counter consists of a closed, hollow, conducting cylinder with a fine wire along its axis. Suppose that the internal diameter of the cylinder is 3.00 cm and that the wire along the axis has a diameter of 0.2 mm. If the dielectric...
  39. Np14

    Impulse applied to a bouncing ball

    Homework Statement A 0.500 kg ball is dropped from rest at a point 1.20 m above the floor. The ball rebounds straight upward to a height of 0.700 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor? Homework...
  40. lalo_u

    Charge operator applied to matrix multiplets

    In the context of SM (##SU(3)_C\otimes SU(2)_L\otimes U(1)_Y##) the charge operator is ##Q_{SM} = T_3 + \frac{Y}{2}\mathbb{I}_2## and gives us the fermions charges. Here ##T_3=\frac{1}{2}\sigma_3## is the third ##SU(2)## generator. For example, assuming ##Y=-1## for the left lepton doublet...
  41. V

    Programs Thoughts on Caltechs Applied Physics Graduate Program

    Why is it paired with materials science? I have not been able to find too much about it online apart from their own stuff. How different is it from their pure physics PhD program? It seems that they have a lot of required courses, although you do not need to take them if you have a sufficiently...
  42. A

    Identify this formula (related to thermodynamics applied to solids)

    Hi all, I've been for quite a while trying to identify this formula. dV / V = β ΔT - κ Δp where β is the thermal coefficient of volume expansion and κ is the isothermal compressibility. I think it's related to thermodynamics applied to solids and I can understand relations between the...
  43. Alan Lins Alves

    Problem with the Finite Element Method applied to Electrostatics

    Hi! I have a code that solve the poisson equation for FEM in temperature problems. I tested the code for temperature problems and it works! Now i have to solve an Electrostatic problem. There is the mesh of my problem (img 01). At the left side of the mesh we have V=0 (potencial). There is a...
  44. I

    Direction of friction in yo-yo where applied force is at top

    Homework Statement We have a yo-yo and the force ##F## which is the tension in the string and this is at the top tangent as shown in the figure attached with this problem. I want to figure out the direction of the friction at the point of contact. Homework Equations Newton's laws of motion...
  45. igurman

    Magnetization relation to magnetic field applied

    A few simple questions which I am not sure about, it's about NMR. First sentence: "A magentic field B0 is applied on a sample, If the applied magnetic field B0 is stronger, the magnetisation of material is greater" . Would you say that sentence is correct? As I understood, magnetization is a...
  46. Oats

    Going from pure math to applied math

    Hello, I am a second year PhD student in pure mathematics, and I'm going through a bit of a dilemma. Up to this point I felt that I wanted to work in Mathematical Logic. To be honest, I think working in any field of math would be fun, but logic had extra cool topics like computability theory...
  47. S

    Force applied on the pulley of a system

    Homework Statement two blocks of masses 8kg and 4kg respectively are connected by a string as shown in firgure. calculate their accelerations if they are initially at rest on the floor. after a force of 100N is applied on the pulley in the upward direction (g=10 m/s). Homework Equations Σf=ma...
  48. Neha98

    Programs Applied or pure physics major is best for an astronomy career?

    I'm willing to make postgraduate studies in astronomy or astrophysics so which major is more suitable for me applied or pure phyics?
  49. J

    Vector torque problem: Force applied to a disc

    Homework Statement A force of magnitude 50N is applied at the bottom point Q of a disk of radius 8m that is pinned at P (leftŸmost point) See attached picture (a) Find the angle between the force and the vector from P to Q. (b) Find the magnitude of the applied torque. Homework Equations...
  50. H

    I Gauss' law applied on a four-dimensional surface

    in a 4D plane or on a four-dimensional surface can gauss law be used?
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