Applied Definition and 1000 Threads

A crate has a mass of 24 kg. What applied force is required to produce an acceleration of 3m/s^2 if the frictional force is 90 N?

Homework Statement A cubical block of ice is melting in such a way that each edge decreases steadily by 9.8 cm every hour. At what rate is its volume decreasing when each edge is 10 meters long? Homework Equations V(t) = (l(t))^3 m^3 l'(t) = 0.098 m/h The Attempt at a Solution...

Homework Statement A 0.15 kg baseball is pitched with a speed of 23 m/s. When the ball hits the catcher's glove the glove moves back by 0.044 m as it stops the ball. Assuming a constant acceleration of the ball, what was the average force applied by the catcher's glove? Homework Equations p...

Homework Statement A particle A (mass m1) is suspended under ceiling by a light string of length L1. Another light string length L2 is connected to A at one end and connected to particle B(mass m2). They are stable under gravbity at first. Suddenly a horizontal strike is given to A and A has...

My school has a neat internship program where they will pay a stipend for the summer if you can find an "internship" somewhere related to your career goals. The nice thing is that it doesn't even have to be a real internship--all that you need is some place willing to let you work for them...

From this theorem, we know that every cauchy sequence is bounded so there exists an accumulation point a\in \mathbb{R}^k. This is the limit point of the cauchy seqence. It shows that there is only one accumulation point as limit point is unique. However is it a must that there is only one...

2 boxes are stacked vertically, box A on top with box B below. Mass of box A is 15kg. Mass of box B is 30kg. There is friction between all surfaces; static coefficient of 0.40, and kinetic coefficient of 0.35. The blocks are stationary when the constant force F is applied to box B (bottom box)...

Hello Physics Forums, I'm attempting a portable energy generator that will apply the Seebeck Effect to a campfire, allowing the camper to enjoy his new source of electricity. Right now I have a basic concept, basically a raised platform on which you stack the logs and then light them on...

Okay, to give a little contextual background, for one of my units we have been given an abandoned town in south-west queensland (AU). It was inhabited by the natives for a while, then Australia was colonised, now no one lives there and there's a few garbagety buildings that are falling apart...

Hello. I'm currently planning to be a double major in Math and Physics and I've scheduled my four years quite a bit (and I took fact of the account that my classes are likely to change over time of course). After scheduling all my classes to fit all the necessary requirements to graduate, I...

So I am transferring to a university within a year, and I don't know which math major to choose. It is either Math/Applied Sciences or Applied Mathematics. What I want to do with my major is go into medical research, but I also want to go to grad. school and get my masters (I can not go to grad...

There are hundreds of options with this tool, so this is just an offthewall sample of what you can get: http://graduate-school.phds.org/rankings/astronomy/rank/_M_M____________________________________________________________U I'm not advising anyone to seriously use this, or believe in...

Homework Statement If an object is moving in a certain direction, with the net force also going in that direction, but the magnitude of the force is decreasing with time as it goes along. What is the speed of the object doing? Homework Equations The Attempt at a Solution Im...

Homework Statement The joint density of X and Y is given by f(x,y) = [e-x/y)e-y ] / y x is between 0 and infinity; y is between 0 and infinity Show E[X |Y = y] = y. Jump to the last part of this post in bold if you just want to check my calculus calculations and skip the probability stuff...

Homework Statement When you apply a horizontal force of 44 N o a block, the block moves across the floor at a constant speed (μk = μs). When you apply a force of 50 N, what is the magnitude of the horizontal component of the force that the floor exerts on the block? Homework Equations...

Unimodular Gravity was proposed by Einstein in 1919. It has the same equations of motion as ordinary GR, so you couldn't tell the difference experimentally. But time and the cosmological constant are treated differently in uni-GR from how they are in usual-GR. This may actually turn out to be...

Homework Statement A metal rod having a diameter of 10 mm is subjected to a repeated tensile load. The material of the rod has a tensile strength of 290 MPa. How many load repetitions can be applied to this rod before it fails if the magnitude of the load is (a) 5 kN, and (b) 11 kN...

Hi, I am in need of some expert advice please. I am enrolling for my honours degree in mathematics next year. I am trying to mix it up in order to have a strong foundation in pure mathematics with specialisation in applied mathematics. My interests are financial mathematics, probability...

What is the difference between applied and mathematical statistics ? Does applied statistics skip a great deal of necessary knowledge ? Is applied statistics enough to construct statistical models?

I find myself switching my mind a lot when deciding whether to apply to aerospace engineering or applied math programs. One thing that will be a factor is how much proving of theorems is required in the applied math grad courses. Does anyone know how much proving of theorems is required in...

Homework Statement t seconds after the brakes of a car are put on, the acceleration of the car is a(t) = -6t - 4 ft/sec^2. If the automobile was moving at the speed of 32 ft/sec when the brakes were put on, how far does it go before stopping? Homework Equations a(t) = -6t - 4 ft/sec^2...

Although I am not yet sure which area I would want to do a PhD in (I am only in 2nd year undergrad) it would most likely be something applied like accelerator physics, plasma physics, metamaterials, plasmonics etc. (I realize this is a ridiculous range of topics :P ) The proposed ~30% cuts to...

let m,n be positive integer. Prove the identity: sum (i from 0 to k): { C(m, i) * C(n, k - i) } = C(m + n, k) Hint: Consider the polynomial equation: sum (k from 0 to m+n) {C(m + n, k) *z^k } = (1 + z)^(m+n) = ((1+z)^m) * ((1+z)^n) I tried long time, still have no idea.

Back up system designed to prevent the loss of memory in a car radio when the radio is removed from the car, how will you do this through electrical explanations..

I am a freshman majoring in Applied Physics and minoring in Math. In my spare time I sometimes browse job listings on monster. My question is if one of the requirements is a BS in engineering would a BS in Applied Physics be equal

Am still not clear which path to choose. Both departments got good program and research. I have admission from both departments. Am bit worried from job point of view after graduation. Do industry/academia treat PhD Applied physics equal to EE for job offers? To give more insight if I choose...

Noob questions on behalf of my daughter, who graduates with a BS in Physics from a research uni next semester and has a decidedly deer-in-the-headlights approach to post-graduate career path. 3.3 GPA in a program with a fair bit of chemistry/biochem/biophysics experience (contemplated MD/PhD...

I am currently in graduate school and I work on modeling. The systems I model rely heavily on stiff ODE solvers (i.e. ode15s in MATLAB) and non-linear solvers as well for solving non-linear reaction and diffusion equations. So far I have typically used MATLAB for my work, but I feel like...

My questions are rather unfocused... I don't really know if they're really questions yet, but chime in as much as possible. I'm just tossing ideas around here. 1. I think all physics programs offer an advance lab class. they offer a range of experiments and you pick some to repeat. Is this...

Hi all, I've calculated the exciton binding energies for different semiconductors using the Bohr model. It works remarkably well for direct gap semiconductors, but it is not good for indirect gap semiconductors (in Si and Ge, there is an underestimation by a factor of 3, approximatively)...

I am a senior majoring in Applied Physics.. I'm set to graduate next year and intended on pursuing a master's degree in Electrical Engineering. After doing research it seems it will be difficult to find a job even after I obtained my master's degree for the simple fact of not being an...

Hello, I am in my final 18 months of my Applied Math BS. I am at the point where I can specialize in a few different areas, I could either take elective courses in Stats or in a more General Applied/Computation/Modelling track. I'm not sure what I want to do with my degree once I'm done yet but...

Homework Statement The question is: The weightless beam, ABCD, shown in Figure below is supported by a pin support at B, and a roller bearing at C. There is a 4 kN/m UDL along the whole beam, as shown. There is an 11.2kNm clockwise couple at A. The vertical reactions of B and C...

There is a metal sphere which is cut and flattened at on one side and the flat side rests on an inclined surface. The figure is attatched please refer it. The weight of the sphere is W = 20*9.81 N . The sphere will tend to slide on the inclined surface as perceived. But the vetical wall...

When calculating buckling force i have only found how to calculate it with a force applied to the entire cross section, how can you use Euler's if the force is applied just to an edge or point. Thanks

hi this is my first post ,and i hope it is ont the last. can i ask you a single question : can you tell me the different between studying theoretical physics and studying applied physics ? thank you.

I always thought engineering is applied science, but a guy at work says no - engineering is a part of applied science. Applied science seeks to apply pure science or discover where it can be applied. So, I'm just wondering what all the nuances are. He said I seem like an Applied Science guy.

A box, mass 100kg, must be pushed onto a table using an inclined plane 1.5 m high. The plane is 4 m long. If the pleane offers a frictional force equivalent to 10% the weight of the box, what force must be applied to move the box? What I tried: sin^-1(4/1.5) = 22.6 100 * 9.8 = 980 N...

Hi :) I have an A Level Mechanics 2 exam in 3 days. I managed to 'solve' this problem from my book, but I'm having some trouble with the underlying concepts. It would be really nice if someone could explain part (c) of the question to me (I've included my solution below but I don't understand...

Homework Statement Consider path given by equation ( x - 1 )^2 + ( y - 1 ) ^2 = 1 that connect the points A = ( 0 , 1 ) and B = ( 1 , 0 ) in xy plane ( shown in image attached ). A bead falling under influence of gravity from a point A to point B along a curve is given by...

I am doing my bachelors degree in computer science. but i seriously want to pursue higher studies in aerospace engineering. any cue on how to proceed??

I will be attending Coastal Carolina University in the fall as an applied physics major, but the school also has a 3+2 program with Clemson where I would get a Physics degree from Coastal and an Engineering degree from Clemson. My question is would it be better to do the 3+2 and then graduate...

Hi everyone, this is my fist post, I am seeking some guidance on where to pursue a PhD. degree on Applied Math or Mathematical Physics. I got my Bachelor's on Physics and right now I'm on the second half of a Master's in math. I'm planning to apply soon for a PhD but I've got no real idea where...

Hi The magnetic force applied to electron spin magnetic moment is interpreted by Lorentz force qvXB ? I do not think so. If not, we easily understand why magnetic force can work. Regards.

Hi guys, I got this thought in my head. If I have a box of mass x, being pulled towards East and the angle \theta, then force applied to the box in order to move it on the surface with friction coefficient \mu has to be in such a way: My question is... wouldn't N be: Or, N...

Hello, I'm a high school student in the Netherlands and next year I am going to University. I am thinking of majoring in Computer Science although I would like to hear you're opinion on the pro's/con's on studing Computer Science vs studing Applied Mathematics. Both the Math departement as...

in class today, we hit a tuning fork and tried to match it with a humming. now what I Want to know is that is this even possible? we tried a lot of times and tried to produce a sine wave but failed horribly. although at the max amplitude, the frequency of our hum matched with that of the tuning...

If I apply the Work-Kinetic Energy theorem to a situation in which an object is lifted or lowered then I can form the equation K(f)-K(i)=W(net)=W(applied)+W(gravity) This equation shows that if K(f)=K(i) then the above equation reduces to: W(applied)= -W(gravity) Now in the situation in...

Will there be a day when theorists (not applied scientists) make as much money as applied scientists? So what do I mean by that? Will biologists ever make as much money as doctors, surgeons, and psychiatrists? Will physicists ever make as much money as engineers? Will chemists ever make as...

Homework Statement Find the dimensions of an isosceles triangle of least area that can be circumscribed about a circle of radius R. Homework Equations Let a,b, and c denote the lengths of the sides of this triangle and c=b. Then the angles opposite these sides are A, B and C...