Application Definition and 998 Threads

One end of a horizontal spring (k = 333 N/m) is attached to a 3.12 kg box, and the other end to a fixed, vertical wall. (A picture of this situation can be found in Fig 4-10 on page 102 of your textbook.) a) Find the magnitude of the force needed to move the mass so the spring is stretched...

A rope is tied to a 97.8 kg log. When you pull on the rope with a horizontal force of magnitude 706 N, the log moves at constant speed. a) Find the magnitude of the resistive (frictional) force acting on the log. You may assume the frictional forces acting on the log is constant. N b)...

[SOLVED] Ideal Gas Law Application Homework Statement One Sunday morning a family takes an automobile trip to Grandma's. At the start of the trip, the temperature is 288K (15C), and the gauge pressure in the tires is 32lb/in^2 (psi). (The gauge pressure is the excess over 14.5 psi, the...

[SOLVED] Application of the equations of motion with constant acceleration Homework Statement A bicyclist is finishing his repair of a flat tire when a friend rides by with a constant speed of 4.0 m/s. Two seconds later the bicyclist hops on his bike and accelerates at 2.2 m/s^2 until he...

1. a table is being sanded. in the process, the sandpaper is rubbed back and forth 30 times over a distance of 0.6m. it is pressed against the table with a normal force of 1.5N, and the coefficient of kinetic friction is 0.85. how much work is being done by the kinetic frictional force during...

Dear All. I am working on a uni project building an ergometer for an MRI machine. I was interested in purchasing a disk brake system to control the resistance and the power output for the ergometer. The application requires that all parts to be non magnetic as it will be used in an MRI...

Dear All. I am working on a uni project building an ergometer for an MRI machine. I was interested in purchasing a disk brake system to control the resistance and the power output for the ergometer. The application requires that all parts to be non magnetic as it will be used in an MRI...

Dear All. I am working on a uni project building an ergometer for an MRI machine. I was interested in purchasing a disk brake system to control the resistance and the power output for the ergometer. The application requires that all parts to be non magnetic as it will be used in an MRI...

Homework Statement Let f be diff. on (0,infinity) If the limit of f'(x) as x->infinity and limit of f(n) as n->infinity both exist and are finite, prove limit of f'(x) as x->infinity is 0. Homework Equations Mean Value Theorem (applied below) The Attempt at a Solution Suppose a>0 and b>0...

Hello, I am trying to learn Windows API on my own and I'm having a little trouble. I made an "Enter" button and all I want to do is basically when the user is finished with one textbox, when they press the "Enter" button that I created, i want the cursor to go to the next textbox. I've been...

Homework Statement A train is traveling from left to right along a long straight horizontal track at 0.9km/min. A movie camera 1km away from the train is focused on the train. a) How fast is the distance between the camera and the train changing when the train is 2km from the camera? b)...

Homework Statement Assume that f is twice differentiable on the entire real line. Show that f(-1) + f(1) - 2f(0) = f"(c) for some c in [-1,1] Homework Equations I'm thinking the mean value theorem will be helpful here -- the MVT states that, given a function f differentiable on [a,b]...

Hello, Im new to this forum and i hope u guys can help me with this question. I need to explain how electric, gravitational and magnetic fields are present in the building and launching of a satellite. I know that gravitational will be present at launching since gravity will be acting on...

Dirac Delta Function: If, at time t =a, the upper end of an undamped spring-mass system is jerked upward suddenly and returned to its original position, the equation that models the situation is mx'' + kx = kH delta(t-a); x(0) = x(sub zero), x'(0) = x(sub 1), where m is the mass, k is the...

Finding Max and Min "Application of Derivatives" Hello There! The following question I need help in and it would be appreciated. Thank you very much! Manufacturing Tires Your company can manufacture x hundred grade A tires and y hundred grade B tires a day where 0 (greater than or equal to)...

I am preparing to apply to a graduate school of physics. I have taken the GRE general test and TOEFL. But I have not taken the GRE Subject test. I find nearly all the universities in US require the GRE Subject test. Is there any university that do not require the GRE Subject test? Or I will have...

Homework Statement A 3.0-kg block sliding on a horizontal surface is accelerated by a compressed spring. At first, the block slides without friction. But after leaving the spring, the block travels over a new portion of the surface, with a coefficient of friction 0.20, for a distance of 8.0 m...

im having a hard time explaining this, so I am going to do my best. please feel free to ask questions on things that arent clear. i want to find out how much one would save on their electricity bill (from the lights and powering the AC to cool the room). I've already calculated the money I...

I was trying to understand how those kind of virus run immediately when you open a folder whcih contains it. I wrote a simple c application that writes my name in a certain location on my computer and now i want to know how i can do so that when i open the folder which contains that c...

A race car travels 44m/s around a banked (45degree with the horizontal) circular (radius = 200m) track. What is the magnitude of the resultant force in N on the 80 kg driver of this car. I've having a hard time setting up the free body diagram. First I broke into Fx and Fy Fx: F...

A bicycle of bicyclist of combined masss 62 kg go over a hump of radius 6m at a speed of 5m/s. what is their combined appararent weight at the top of the hump? is it just... Fc = MAc Fc =M(V^2/r) Fc = 62(25/6) Fc = 290N

(1) What is the magnitude of the net force on a skydiver in N when an 810 N gravitational force and a 750N force of air resistance act on him? Fn = 810 Fg = 750 810 - 750 = Fm 60N (2) A 1200 kg car is moving in a staright line at a constant speed of 15m/s when the brakes are...

Okay, I've been working on designing a custom mold cut for a 410-gauge shotgun slug and need some help with the principle of "Drag Stabilization". Many shotguns are smooth bores and thus shotgun slugs in order to dependably fly straight must have a drag-stabilized design. They can not depend...

Homework Statement I am trying to understand how these Newton's laws work, specifically with an object on an incline. If a 5.00kg object is attached to a Newton spring scale on an incline (incline makes 30 degrees with the ground), what reading is the scale giving? Homework Equations Fx...

I have a question regarding a load cell application I am working on. I am designing a loss in weight feeder system and would like to use a single load cell for my hopper weight. Upon preliminary trials, I mounted the load cell on one side of the hopper and hinged the other. This does not give me...

Just a question regarding Differential Calculus Application. Can anyone help me to solve this using differential calculus. Here it is: A farmer has enough money to build only 100 meters of fence. What are the dimensions of the field he can enclose the maximum area? thanks in advanced:D

My understanding is that today's computers aren't able to simulate true randomness, only complex functions that appear random but can be predicted if someone knows how they work. Is there any way to incorporate the "true" randomness of QM into technology to achieve true unpredictable randomness?

Does anyone know what the deadline is for applying for University in the United States? I want to apply for next year and I am wondering when the deadline is. Thank you!

Homework Statement Solve the following question by using Stokes' Theorem. (Line integral on C) 2zdx + xdy + 3ydz = ? where C is the ellipse formed by z = x, x^2 + y^2 = 4. Homework Equations The Attempt at a Solution We have the vector A=(2z,x,3y) which is cont...

Hello, Supose you have an U tube, in which the inner walls are made absolutelly reflective. Now, put a termical state (temperature T) for the radiation field inside the tube and close it with reflective discs which can slide without friction. Supose further that de diameter of the tube in its...

The question is "For single women in the poll, the percentage who said no exceeded the combined percentages for those who said yes and those who said not sure by 22%. If the percentage who said yes is doubled, it is 7% more than the percentage who said no. Find the percentage of single women...

Greetings everyone! I am new to this forum. I take a variety of mathematic courses and needed some help so found this website. Its great to see a variety of people interested in mathematics! In my current calculus class, we are learning about Integral areas in geometric shapes and...

Homework Statement An elevated train on a track 30.0 m above the ground crosses a street (which is at right angles to the track) at the rate of 20.0 m/s. At that instant, an automobile, approaching at the rate of 30.0 m/s, is 40.0 m from a point directly beneath the track. Find how fast...

Hi, I am new poster on this forum. Apologies if you have already answered a similar problem before. let me get to the point straightaway. Now consider one example: Take a shopping cart and sit in it. Now jerk your body in any manner you require. The goal is to create a net motion forward...

Help me Guys How to select the Injector for CNG application

Hello. Can someone tell me how is Heaviside (or Unit Step) Function used in real life?

Homework Statement List all the elctirical application in your home in a table and power rate? please write the power rate with application.

I recently invented a new application for vortex tube. The application requires a very minimal flow of air at freezing temperature. I wonder if it's possible to design a vortex tube at a very small size if only a very tiny air flow is required? Is flow rate proportional to physical size...

I'm waiting on this REU application. They sent me an email last week asking me if I was still interested in a position. I told them yes, but have yet to hear back from them. I called them on Tuesday, they said that they hoped to make their final decisions by the end of the week. AHHHHH! Just...

Hi, latetly I've been reasoning a bit about the string theory (or M-theory). The scientists are very interested in showing the correctness of the theory, but to what purpose I question myself? How will the theory be used? How will the theory be applied? There must be some application for...

Homework Statement Suppose that a town has a population of 100,000 people. One day it is discovered that 1200 people have a highly contagious disease. At that time the disease is spreading at a rate of 472 new infections per day. Let N(t) be the number of people (in thousands) infected on...

I'm currently studying complex numbers in my high maths class, moving onto trigonometry. I already know some applications of complex numbers, such as phase differences in capacitive and inductive circuits, but what other applications are there? Can they be applied to circular motion in...

A block of mass 20kg is pushed against a vertical surface at an angle of 30 degrees as shown. The coefficient of friction between the surface and the block is 0.2. What is the minimum magitude of P to hold the block still? I got 271.5 when I tried but the answer is 202.2

I'm doing background research on a real application. At high altitudes (and/or when people are shooting at you) helicopters can't stop and hover, but could snag a survivor or critically injured litter patient at around 30 knots (15 meters per second) A similar device (Fulton Recovery system)...

P.W. Anderson won the Nobel prize for the investigation of electron localization phenomenon in semiconductor crystals. And in recent years there are people investigate into the localization of photon in random media. I read some publication but none of them say anything about the application of...

hi. i am looking for a satisfying source about the topic written in the title. it is my semester project. if you can help me i woud be appreciated. thanks already now.

Hi, I am trying to figure out the most effecient method to heat an electronic component in a portable battery powered device. The first thought was just an ordinary wire wound resistor or another possiblity is a peltier TEC. The whole thing needs to be as efficient and small as possible...

Homework Statement \lim_{x\rightarrow 0} \frac{xe^2x+xe^x-2e^2x+2e^x}{(e^x-1)^3} Homework Equations L' Hospital's Rule \lim_{x\rightarrow 0}\frac{f(x)}{g(x)}= \lim_{x\rightarrow\0} \frac{f'(x)}{g'(x)} The Attempt at a Solution Phew, I think my hold on the latex codes are solid now, thanks...

Here's a problem that I just found in my book and to my dismay, I couldn't figure out how differentiation can be used to solve a particular problem (seeing how we've just finished this unit at school). So here's the problem: Felicity and Jane start alking at the same time towards an...

So I wrote this personal statement for my REU application... Could you critique it? At this point it still needs a lot of work but I need to have it done by Monday so I can start asking professors to write letters of recommendation. Below is the first draft of the personal statement...