Homework Statement
A 5.0kg mass is suspended from the ceiling. A horizontal force F is applied to hold the string in position as shown
http://i.imgur.com/ZdR72ff.jpg
Determine the reading of F on the spring balance by using a scale diagram
Homework Equations
None
The Attempt at...
Homework Statement
A ladder weighing 200N is being held by a man. The man shoulder acts as a pivot. His arm is pushing an upward force F.
http://i.imgur.com/dMrcRtK.jpg
Where could a weight of 150N be hang upon, so that force F do not need to counteract the weight of the ladder...
Hi everyone.
I am self studying for my GCE for the past 6 months now. I have been doing revision for a long time and did some question papers. I have a few problems and hope the people here can guide me. Thank you
Problem 1.
Homework Statement
A 5.0kg mass is suspended from the ceiling. A...
Hi, I'm interested in how light and how electricity works so I'm interested in a beginners (undergraduate level) physics book that has the following:
Giving intuition by showing each experimental setup - visually (with ppictures) and mathematically - which contributed to the understanding...
I'm studying using the popular Lindenberg book. It suggest I have to memorize about 30 elements and their respective oxidation numbers. However, the book was written before they revamped the exam. Anyone know if I still have to memorize this?
Hello everyone. I have a rather unusual issue in which I do not seem to some know/understand basic concepts in prealgebra, but do rather well in something like calculus. By basic concepts, I don't mean something like solving equations, but I don't understand why certain things work the way they...
Find the phase angle between i_1= - 4 sin(377t+55) and i_2= 5 cos(377t-65)
The Attempt at a Solution
Ok, so I converted i_1= 4 cos(377t+145) and i_2=5cos(377t-65)
According to lectures in class the 'most' negative leads. So in this case i_2 leads by -65-145=210. However, if you look at the...
I've been reading up on gauge theory and it isn't easy. Can someone give me an easy summary of its fundamental scope and postulates without too much math. It seems really important insofar as it defines itself as something of a "parent" theory to most of the leading cosmological models of the...
Author: Frederick Reif
Title: Fundamentals of Statistical and Thermal Physics
Amazon Link: https://www.amazon.com/dp/1577666127/?tag=pfamazon01-20
Prerequisities:
Table of Contents:
1. Introduction to Statistical Methods
Random Walk and Binomial Distribution / General Discussion...
Author: Theodore L. Bergman (Author), Adrienne S. Lavine (Author), Frank P. Incropera (Author), David P. DeWitt (Author)
Title: Fundamentals of Heat and Mass Transfer
Amazon Link: https://www.amazon.com/dp/0470501979/?tag=pfamazon01-20
Prerequisities:
Contents:
Homework Statement
We say that the displacement of a particle is a vector quantity. Our best justification for this assertion is:
A. displacement can be specified by a magnitude and a direction
B. operating with displacements according to the rules for manipulating vectors leads to results...
I'm trying to get a basic understanding of RF DAC.
If I have a DAC that does 100 MS/s with an 8 bit resolution, this translates to a 800 Mbps throughput. Or is this too simple?
Now, how does the bandwith of a channel affect this? Say I have two 5 MHz channels. With two channels there...
http://oyc.yale.edu/physics/phys-200
http://oyc.yale.edu/physics/phys-201
I'm starting college in September and have never taken Physics before, so I am preparing by reading different books and watching some videos, and was wondering if this course is worth watching because the curriculum...
Hi, My name is Ersel!
FE has just been launched in ITU in Turkey firstly . I'm study (MSc) Enginnering Physics in ITU and will graduate this depertmant in 2013 ,naturally, have a BS Physics degree but not enginnering .
In this case, I'm not enginnering I ' m just a physicist :) !
(I guess...
Everybody says that inorder to master physics we must be thorough in our fundamentals . So can anyone explain me wat is meant by getting fundamentals correct and how to study physics conceptually
hi guy i have a question regarding digital fundamentals plss help:)))
Show how ONE XOR gate can be replaced by THREE 2-input logic gates.You are allowed to use any logic gate except XOR and XNOR logic gates...anybody can solve this?:))
I am not exactly sure if I am posting this in the right section, but I am taking a class called Fundamental of Engineering 101 this Fall term for school.
Do any of you know what I should study before taking this class?
can anyone help me with this one... i am not able to solve most of the problems in fop by resnick and halliday,can anyone mention which books should i refer so that i develop good problem solving skills and will be able to solve tough problems.. please guys suggest something! thanks in advance
"Fundamentals of Electrical Engineering" Circuit Basics Question
Homework Statement
I am asked to find p1, p2, p3, p4.
Homework Equations
p=vi
ƩP=0
The Attempt at a Solution
p1=(5)(-9)
=-45
p2=(2)(9)
=18
p4=(3)(5)
=15
p3=v(.6i)
=v(.6(4))
=v(2.4)
I know that v=5 and...
Homework Statement
Find the amplitude, frequency and period of a particle whose distance from the origin is described by
x=4cos(5t)sin(8t)
Homework Equations
The Attempt at a Solution
Would sin x - sin y = 2 cos [(x+y)/2] sin [(x-y)/2] be a worthwhile expression to try?
I undestand the following concerning the frequency response function;
Frequency response function is a fundamental measurement that isolates the dynamic properties of a mechanical structure.
It describes the input output relation between two points of a structure as a function of...
well, i know there must be a different between them with the word "EXTENDED"
here is my problem,
my class required Fundamentals of Physics(NON EXTENDED) and i bought a Extended instead...so can i still use Fundamentals of Physics Extended instead of the non extended?? does Extended version has...
The question I am looking at has a man of X kilograms of mass, with a rope tied around his waist. That rope is thrown over a tree limb. The man pulls on the other end of the rope to hoist himself up, with say, Y netwons of force (tension). The aim of the problem is to solve for his acceleration...
Math 360 "Fundamentals of Mathematics"
I wasn't able to get into my astronomy course I need, so I instead registered for this course, Math 360. It is not required for physics majors but it is required for math majors, and I may double major.
It's only prerequisite is Calculus I, which I am...
The best understanding I have got is that it is the word we use to describe flux - a fundamental state of the universe.
Maybe the question can be rephrased as 'why do things affect each other?'
My class wants the 8th edition. Is there much of a difference between the older/cheaper versions? I really don't want to spend a lot of $$ if I don't have to!
Homework Statement
a) For any fixed integer q > 1, prove that the set of points x = p/q^8, p, s ranging over all positive integers, is dense on the number line
b) Show that if p is required to range only over a finite interval, p<= M for some fixed M, the set of all x is not dense on any...
So before I graduated with my BS in Civil Engineering I took the FE exam in Arizona and passed it. I then went out of state for my Masters in Civil Engineering. I am getting close to graduating and am looking to get a job. Do I need to retake the FE exam if I work outside of Arizona...
Opinions of "Fundamentals of Physics" textbook
http://www.google.com/products/catalog?q=fundamentals+of+physics&rls=com.microsoft:en-us&oe=UTF-8&startIndex=&startPage=1&um=1&ie=UTF-8&cid=17779640656174386744&sa=X&ei=6MJvTYC_DoussAPG08XRCw&ved=0CDQQ8wIwAw#
Do any of you have experience with...
1. The point P at the origin of a spherical-surface radiation source. The diameter of the sphere is 30cm, and the source intensity is uniform of 10^5 particles cm^-2 sec^-1 over the entire spherical surface. (a) Calculate the fluence rate (particles cm^-2 sec^-1) at P. (b) Calculate the average...
Hi all,
My objective is to understand the electronics of a computer.
It does not have to be a modern computer, but I want to know how the basics of digital electronics (like flip flops, gates, counters) are assembled togather to get the desired output.
Its more like how the individual...
Hi this problem is one I couldn't understand very well so I couldn't do big attempts at solving
Homework Statement
since I have it on pdf and I don't want to mistake in typing and that there is a picture in it I made the problem into a picture...
[b]1. ammonia at 20 c with a quality of 50% and a total mass of 2 kg is in a rigid tank with an outlet valve at the bottom. how much liquid mass can be removed through the valve assuming that the temperature stays constant?
and from so table in the text
saturated press.= 857.5kps (@20 c)...
Dear all,
This is a query from DSP which I need to implement in MATLAB. I am new to both, DSP and MATLAB.
I have gone through the Transfer Function (TF) theory in MATLAB Help but could not really figure out how I use it for my application.
Just to give you an idea of my task:
I have two...
Homework Statement
A rapidly growing plant doubles in height each week. At the end of the 25th day, the plant reaches the height of a building. At what time was the plant one-fourth the height of the building?
Homework Equations
The problem is a part of chapter which deals only with...
Anyone? I took it. I think I passed. We will see in 2 months. I took the general exam in the afternoon. The morning section was a breeze but the afternoon section was kinda difficult for me. I am an EE and I am bad at some of the ME stuff. Unfortunately, the exam seems to be skewed toward...
hi
Is there lectures on the net about nuclear engineering?
I read many but most of them are fundementals.
I am searching for written lectures or video lectures...
Hi,
I have this quite basic question regarding photonic crystals.
As I understand, a periodic dielectric structure (photonic crystal) has modes (spatial profiles) at discrete frequencies from:
\nabla \times \Big( \frac{1}{\epsilon(r)}\nabla \times H(r) \Big) = \frac{\omega^2}{c^2} H(r)...
I'm taking Physics this year. The problem is that the lectures are not going to be in English, my native tongue, and I'm not yet fluent in the language of instruction. I'm an international student and will be dealing with this my entire studies.
The book the class is using is Fundamentals...
Hello Everyone,
Recently, I was trying to explain the fundamentals of thermal radiation to a non-engineer and I discovered that I myself have a poor understanding of it. I understand that "thermal radiation is continuously emitted by all matter whose temperature is above absolute...
Homework Statement
The load in Fig. 11.44 draws 10 kVA at PF =0.8
lagging. If |IL |=40 A rms, what must be the value of C
to cause the source to operate at PF =0.9 lagging?
Homework Equations
P(apparent power VA)= |I| |V| cos@
@ = @V - @I
cos@= p.f
X= Xrms*(2)^0.5
S(complex...
Not sure if this belongs here, and it probably doesn’t. I just wanted to let all you folks at Physics Forums that I recently found out that I passed the April 2009 FE exam (on my first try). I am a Senior Civil Engineering student at New Mexico State University. Also I would like to thank...
Hi,
I am new here at the forums, and I would like to ask anyone here that has the same book (Physics by Alonso and Finn) if they would want to do a over the summer review.
I have taken Physics 1-3 at a university but I mainly did them just to get them done. Now, I want to really...
1. Light takes 1.28 s to travel from the moon to Earth. What is the distance between them?
2. d= vt
3. d = vt
= 3 * 108(1.28)
= 3.84 * 108m
1.The sun is 1.5 * 108 km from Earth. How long does it take for its light to reach us?
2. d= vt
3. d = vt...
I'm having a hard time trying to figure out if Linear Algebra or the Foundations of Higher Mathematics would be best to take for fall quarter. I briefly thought about just taking both, but I'm not sure if I could handle it. Originally I was thinking about take linear algebra, but a friend...
Hi I am curently doing my degree in chemical engineering and I'm finding the separation processes module a bit rough, mainly because of interuption to lectures and the lecturer not being there most of the time.
Anyway I've got an exam coming very soon and need some help, getting desperate! A...