Moments (stylized MOMents) is a Filipino celebrity talk show hosted by Gladys Reyes and aired on Net 25. It is a show for mothers and kids that feature the different bonding moments, child-rearing styles and the many facets of motherhood. It airs 7pm every Saturdays with replays on Mondays to Fridays at 10 A.M and Sundays at 11:30 AM / 12:30 PM.
I have a couple problems that I can't seem to get.
The first I'm really close, I can tell, because my professor did one that was similar in class. The answer the book gives is 250 lbs, I'm coming up with 225.
The second I think is similar to another problem he did in class but I'm not...
Hey guys, I need some help. I have an old fortran program that needs axial moment of inertia as well as polar moment of inertia.
I have the part in Unigraphics NX5.0, where I can get the mass, volume, radius of gyration, and moment of inertias about each axis. However, I cannot find where to...
Hi,
I'm currently working on an imaging problem that oddly requires some physics. Basically, I'm given a set of gray scale pixels and I have to determine whether they're a fiber or just random noise. My question is, how do I calculate the moment of inertia of the pixels while considering...
Homework Statement
A system of spin 1/2 magnet moments with μ = 1*10^-23 Am² are in a magnetic field of 0.2T. At what temperature will 90% of the magnets be aligned parallel to B?
The Attempt at a Solution
I think I have found the relevant equation:
U=-μB(N↑ - N↓)
where U is the...
Homework Statement
Let Y1, Y2, ... Yn be a random sample from the distribution with pdf
\frac{\Gamma(2 \theta)}{[\Gamma(\theta)]^2} (y^{\theta -1)(1-y)^{\theta -1}
for 0 \leq y \leq 1
I have to find the MME for theta
Homework Equations
This is a beta distribution where m = n =...
Hi sorry I am rather new to all this but I was woundering if I could get some help?
Im currently studdying for my Uni's resits over the summer which fall in just a few weeks time.
Iv started to go through some of the old past pappers and I've got stuck on the same bit over and over again...
Im having problems with two questions, the first is linear acceleration, A 6.00-kg cylindrical reel with a radius of 0.600 m and a frictionless axle, starts from rest and speeds up uniformly as a 4.00-kg bucket falls into a well, making a light rope unwind from the reel. The bucket starts from...
Homework Statement
I'm not sure how to go about finding the following moments:
M_{x}= \int \int\ y dx dy
M_{y}= \int \int\ x dx dy
Where the region is bounded by the ellipse:
\frac{(x-2)^2}{16}} + \frac{(y-4)^2}{36}} = 1
Homework Equations
Listed above...
The Attempt...
Hi there...
I'm not sure how to go about finding the following moments:
M_{x}= \int \int\ y dx dy
M_{y}= \int \int\ x dx dy
Where the region is bounded by the ellipse:
\frac{(x-2)^2}{16}} + \frac{(y-4)^2}{36}} = 1
I tried this several ways. I drew the ellipse and found the bounds to be
-2...
We can easily write down configuration of electrons in an atom of given element. The question is how can I calculate the magnetic moment of given atom knowing configuration of electrons in that atom? Or maybe some other data is needed? Especially I am interested in calculation of magnetic moment...
Moments of Inertia, Centres of Mass... help please!
Homework Statement
A rod of length l rotates about an axis that runs perpendicularly to the rod through one end. The linear density p(x) of the rod in terms of the distance x from the axis is given by:
p(x) = p0(1 + (x^2/l^2))
where...
Homework Statement
http://img376.imageshack.us/img376/1033/questionii7.jpg
The diagram shows a cross-section ABCD of a uniform rectangular block of weight W. The lengths of AB and BC are 2a and a respectively. The edge through A rests against a smooth vertical wall and the edge through B...
not totally sure this should be in the advanced physics section.
its a general test your knowledge question of everything youve learnt, so naturally i can't remember anything...
a magnet of magnetic moment U is droped such that it falls down metal tube of length L. the magnet's magnetic...
If a something is rotating about an axis with a constant velocity is the sum of the acting moments 0 since no acceleration is occurring?
Moment = mass x acceleration x distance
If acceleration is 0, the moment is 0.
Is this correct?
Hi I have a few problems from 'Physics for Scientists and Engineers' by Serwat and Jewett, chap 10
Prob. 51
A cylinder of mass 10 kg rolls without slipping on a horizontal surface. At the instant its centre of mass has a speed of 10 m/s. Determine (a) the translational kinetic energy of...
Homework Statement
At a particular stage of the manufacturing process, a robotic arm has the position and loading shown in the figure;
http://img246.imageshack.us/img246/5498/25481552jo0.th.png
Calculate the direct stresses due to bending and the shear stresses due to torsion...
Simple moments ! Can't do ! Urgent
Homework Statement
Determine the reactions at the smooth collar A, the rocker B and the shortlink CD.
Homework Equations
RC = Normal reaction at smooth collar A.
RN = Normal reaction at rocker B.
RD = Normal reaction at D.
Moment at rocker B is...
Homework Statement
A yo-yo consists of two uniform heavy discs, each of mass M and radius R, connected
by a light axle of radius a around which one end of a string is wound. One end of the string is attached to the axle and the other to a fixed point P. The yo-yo is held with its centre of mass...
A uniform Disk of radius 0.18 m is mounted on a frictionless, horizontal axis. A light cord wrapped around the disk supports a 0.57 kg object. When released from rest, the object falls with a downward acceleration of 2.6 m/s^2
What is the Moment of Inertia of the disk...
Homework Statement
A non-uniform plank of wood AB has length 6m and mass 90kg. The plank is smoothly supported at its two ends A and B, with A and B at the same horizontal level. A woman of mass 60kg stands on the plank at the point C, where AC=2m. The plank is in equilibrium and the...
Homework Statement
Four small spheres, each of which you can regard as a point of mass 0.200 , are arranged in a square 0.400 on a side and connected by light rods.
The picture has 4 spheres connected by rods in the shape of a square. Theres a point O in the middle of the square and a...
Homework Statement
Hello~ I just had a general question about moments and finding them~ I have no idea how to! In my statics class the professor gave us the Moment about o = r X force, but it gets confusing with more than one vector on more than one plane... and there is also this thing...
Homework Statement
http://img510.imageshack.us/img510/7663/26160035im5.jpg
Homework Equations
principle of moments
The Attempt at a Solution
I took moments about the base of teh retort stand :
(220 X x) = 228 X 9
x = 9.33 which is wrong as the question says show that it is...
Hi guys,
I am having difficulty understanding moments and equilibrium.
I have attached a diagram of a sample problem. The red Arrows are T1 resolved into X and Y components.
Let's say that I want to find the equilibrium equation for the moments about A and B. I realize that forces...
1. http://img337.imageshack.us/img337/520/fic06p090bk7.png
http://img337.imageshack.us/img337/2763/vqc06p090je0.png [/URL]
2. \sumMaboutapoint
\sumFy
\sumFx
3. Well firstly i just looked at it as a whole to see if i can figure out any of the reactions at F or B. I am confused...
Hi there, quick conceptual question just to make sure I know what I am doing...
I am given two forces, F1 and F2, in vector form with given magnitudes.
(I) Find the resultant force about point P (given).
(II) I am also asked to find the Moments of the resultant force about point P.
(I)...
Hi there, quick conceptual question just to make sure I know what I am doing...
I am given two forces, F1 and F2, in vector form with given magnitudes.
(I) Find the resultant force about point P (given).
(II) I am also asked to find the Moments of the resultant force about point P.
(I) I...
Homework Statement
(Q) A beam 4m long is supported at the left hand side by a hinge support and on the right by a roller support. It is under a non-uniform load intensity throughout by a load intensity given by:
w = 25Cos(pi x/8)kN/m.
Write equations for the shear force and the bending...
I need some help with number 4.16? well actually I just can't understand the question.. what I did is calculate all the moments with respect to A.. but I don't know if this has some relevance to the problem.. \sum MA= -2 (18.49) - .8 (4.5) +.8 (5.51)
I took the counter clockwise direction as...
Homework Statement
http://www.tunerspec.ca/school/question_oct16.jpg
Homework Equations
M=FD
The Attempt at a Solution
http://www.tunerspec.ca/school/work_oct16.jpg
I'm having trouble solving for B by adding the moments about the point A. I am getting an answer of 4.31kN...
Homework Statement
The four masses shown in the figure below are connected by massless, rigid rods.
http://i241.photobucket.com/albums/ff4/alg5045/p13-17.gif
a.) Find the coordinates of the center of mass if Ma=100g and Mb=Mc=Md=230g.
b.) Find the moment of inertia about an axis that...
Homework Statement
It's number 4 I'm doing
Homework Equations
ΣmomentA= 0
ΣFx= 0
ΣFy= 0
The Attempt at a Solution
i've got the correct answers i think, but I'm not sure how to draw the shear force and bending moment diagrams because of the moment that's included. i did draw...
[Urgent]Assignment On Couples and moments
Homework Statement
Two coplanar couples equal and opposite moments balance each other
Hint:
Case1: lines of action constituting the couple intersect
Case2: lines of action constituting the couple do not intersect
Above is what the lecturer...
I think I am getting the wrong answer here, but I don't know why. Would someone please be so kind to go through this basic stuff.
Question: The force F exerts a 200 ft-lb counterclockwise moment about A and a 100 ft-lb clockwise moment about B. What are F and theta?Attempt:
M_A = 2 F \cos...
Hi,
As part of a school project on statistics, I'm trying to calculate some parameters of collected data. I've the marks of 50 randomly sampled students in 6 subjects. I'm trying to calculate their skewness. Since the inbuilt Excel function to calculate skewness uses an estimator I've never...
Moments & couples 2D (for now) (cant move on :( )
Hey guys and girls, I am new to this forum but been looking at it for a while, its a great read and always a challenge here or there, but for now i was hoping to get a little help
:)
Homework Statement
The direction of the two thrust...
Homework Statement
Consider a thin rod of length L which is pivoted at one end. A uniform density spherical object (whose mass is m and radius is r = 1/6L) is attached to the free end of the rod. The moment of inertia of the rod about an end if I = 1/3 mL^2. The moment of inertia of the...
Homework Statement
Consider 3 objects of equal masses but different shapes: a solid disk (radius R), a thin ring (radius R), and a thin hollow square (side 2R). The ring and the square are hollow and their perimeters carry all the mass, but the disk is solid and has uniform mass density over...
when there is enough block ... here is my problem.
a hyperbola having F(-5,0) and D(5,0) and difference of focal radii 6.
We can use |PF - PD|= 6 or PF - PF = \pm6.
I apply the distance formula ..eleminate radicals and simplify.
I get
16X^2 -9y^2=144
Divinding both sides by...
Homework Statement
1.Describe how you would find the centre of gravity of a piece of cardboard of irregular shape.
2.The figure represents a tray held horizontally by a glass of water. The tary has a weight of 6N amd supports a drink of weight 3N.The waiter provides a force at P. The tray...
Homework Statement
Hi
I have a physics exam tmorrow and I was hoping I could get a little help with the moments problem. I attached the drawing and the question asks:
a-1. State the principle of moments
b-1.Write down expressions including W, Rc and FA for
(i)the total counter clockwise...
A uniform scaffold pole of length 5m has brackets bolted to it as shown in the diagram below. The mass of each bracket is 1kg.
http://img502.imageshack.us/my.php?image=mechanicseb9.png
The centre of mass is 2.44m from the left hand end. What is the mass of the pole?My attempt:
I tried using...
Hi all,
just having a little trouble getting my head into the following problem.
(See attached picture)
The picture shows a robot leg, assuming the rest of the leg joins onto something rigid, I need to calculate the torque the motor is required to have to resist the 333g making it...
Homework Statement
A large disk of mass M and radius R is spinning like a CD of merry-go-round - that is, about an axis perpendicular to the plane of the disk. It is rotating at an angular velocity (omega initial). At some instant, a sphere of mass M/4 , which is initially not rotating, is...
So I have a point A on a graph with x and y axes. From the origin, the point is 3r to the right, and 1r up. I'm to find the Moment of Inertia along the x, y, and z axes. I've found the x and y moments, but not the z and I'm not really sure on how. I'm not getting any ideas from the graph...
Homework Statement
Two plasterers Bill and Dave of mass 45kg and 65kg respectively stand on a unofrm plan ABCDEF of length 4m and mass 40kg. The plank is supported at C and E where C is 1m from A and E is 1m from F. Plasterer Bill stands at B which is 0.5m from A and plasterer Dave stands at D...
For my statistical mechanics class I need to find the cumulants of a special distribution of which all moments are constant and equal to a. I followed two different approaches and obtained imcompatible results, something is wrong but I couldn't figure it out.
Here's what I did:
Since all...