Strength Definition and 1000 Threads

From the radius (1740 km) and mass (7.36 X 10^22 kg) of the moon, calculate gravitational field strength for this body. g = F/m = F/(7.36X10^22 kg) F = GmM/r^2 = (6.67X10^-11)(7.36X10^22)M/(1740X10^3)^2 What is the big M?

Hey, Just wondering, how would you find the yield strength for an elastomer just from the engineering stress-strain curve. My professor said its complix and different books have different ways of finding it. Any ideas?

I'm proposing that everything has equal advantages and disadvantages. Good management is having strengths affect critcal spots and weaknesses affect non-critical spots. There are a lot of real-world examples (as politics shows), so I won't go about posting them here. Also no one can know...

http://physics.uwstout.edu/StatStr/Strength/indexfbt.htm#STATICS%20&%20STRENGTH%20OF%20MATERIAL The above link has become inactive (the author, Robert Foley has apparently retired), but another professor has put the course notes into a pdf...

After a certain external field strength can it collapse?

Can you please help me with my problem? I need to measure how sound spreads trough foam. To measure it i need one source of sound and one recorder of sound. Ofcourse i need to change frequency and strength of sound to see if there is change in its spreading trough foam. I don't know how to...

The maximum theoretical field strength for a neutron star, and therefore for any known phenomenon is 1013 T. Why is there a maximum?

Alright everyone, normally I am prett good with electrostatics, butlately...I've been in a serious rut. My physics professor has asked us to varify the electric field at a distance r from a cylindrical gaussian surface, under three conditions. 1) with a constant chrage density, 2) with a...

Max tensile strength of "Unobtanium" "Unobtanium", of course, is that ever popular fictional material used in Sci-Fi to do things that today's materials can't. The idea being that although the materials we know of and use today have well established limits, there's no telling what will be...

Hurricanes grow stronger over warm waters and correspondingly lose strength over cool waters. Hurricanes typically need an ocean temperature of about 80º F, 26º C, to form. This page shows the cooler waters following Hurricane Bonnie caused Hurricane Danielle following in Bonnie's wake...

Hi for school i need to design a balsa wood beam. Winner is judged be strength to weight ratio. i have searched around and found all the stress and strain values for balsa wood at different densitys etc... now my dilemma is that i have to use formulas to design this beam before it is...

By the laws of scaling, what would it be like if an object with infinite strength (which does not exist) would try to support an object with infinite weight (also does not exist. I know, this is one of those 'this cannot happen because it is a paradox' things so please forgive me)

Here is my solution. I completed this problem to the best of my ability and I am asking for someone to check and correct my solution if possible. I am not sure if my answers are correct, although and my thinking might also be flawed :confused: q1= 6.0e-6C q2= 1.5e-6C q3=-2.0e-6C The...

What do you think are the true strength of America,those unique factors on which America is progressing ? Here is mine:- America's genre of importing people,really smart people and extracting maximum out of them.!

Most of us have probably heard the anecdotal accounts. One common story involves a mother who lifts a car which has fallen off the jackstands and trapped her son. In my own family there is a story about a great great aunt who, at about 120 Lbs or less and back in the 1940's I think, allegedly...

Hey, does anyone know a backyard method for testing adhesive strength? Need to compare the strength of things like sellotape/masking tape. Cheers A

I was wondering exactly how yield and tensile strength increases with increasing levels of strain rate for a typical steel grade? I understand dislocations are generated during straining (work hardening), but what happens at higher strain rates which increases the strength?

Hi, I have a question in comparing the strength of H-bond. If we mix two H-bond liquids, Propanol (C3H7-OH) and N-Ethylmethylamine (C2H5-NH-CH3), how does the H-bond act in this mixtures? Does the -OH get together with -OH or with -NH? Which pair is stronger among OH...OH, OH...NH and NH...NH...

Bond length, Bond strength, relationship ? Is this always true ? And why? My answer to this question would be, having larger electron density between two nuclei, thus attraction, allows them to position more closely. But somehow I think that there could be some exceptions of this rule...

This is sortof a mix of physics, engineering and metallurgy so I'm not sure if this is the best place for this, but I figured it will get sorted out. I am looking into adding an http://www.mtbr.com/interbike/booths/bikecontrol/ device to my recumbent bike which attaches at the rear dropout...

While mowing the grass, I thought of the following problem (to take my mind off of the heat!) Consider a vertical column of water in a container. The pressure exerted by the water on the sides of the container is rho x g x h, where rho is the density of the water, h is the height of the column...

Hey! I've got my A-Level Physics exam on Thursday, and I'm just doing some past papers and I'm totally confused! Please help! One of the questions (multiple choice) was saying which statement was incorrect. The answer was: Electric potential is zero whenever electric field strength is...

I just received another problem that was faxed from the lady i mentioned in my other thread in this forum. She is urgently asking for help with virus attacks in a day. Supposing that a patient is infected with N(large number) viruses, under what condition that should be established can I say the...

Using furnace and a rolling mill, how to strengthen these? (i)Commercially pure aluminium (ii) Fe-0.2%C (mild steel) (iii)Commercially pure Titanium (HCP metal; 2 methods can be used) How to strengthen these? For (i), is that just roll it and then normalise it? For(ii), forming...

How is tranverse tensile strength defined? How is it measured for thin fibers? Some high strength fibers such as carbon fibers have longitudinal tensile strength of 1,000,000 psi. But these fibers have diameters that measure in the microns. How could a transverse tensile strength be measured in...

Q: "The Earths radius is 6700km. Show that the magnitude of the gravitational field strength at a height of 350km above the Earth's surface is about 9 N/kg" I got the mass of the Earth which is 5.98E 24 G the constant = 6.67E -11 Formula : g= GM/r² , i can't seem to get 9, am I supposed...

I have racked my brain for the past two hours and I can't figure this out. If anyone can help me with, please do. Two long parallel wires 6.00 cm apart carry 19.5 A currents in the same direction. Determine the magnetic field strength at a point 12.0 cm from one wire and 13.4 cm from the...

Hi! I'm doing my physics lab and I need to find the normal strenght applied on an object. Here's the info I have: weight: 0,558 kg gravitational strenght: 0,558 * 9,8 = 5,47 N Anybody can help me out? Thanks! :smile: - Alex

[FONT=Verdana] I have interest in an application involving a very high pressure tube. The pressure a pipe can resist is given by the Barlow formula P = 2*S*t/d, with P the pressure, S the tensile strength of the pipe material, t the pipe wall thickness, and d the inner diameter. I want to get...

Is it the case that an Aluminium alloy will change strength (yield/ultimate) if subjectet to a varying load instead of a static one? I can't quite see why it should...can someone help me with this?

http://www.newscientist.com/channel/mech-tech/mg18624931.000

Could anybody tell me what material will give the best tensile strength to weight ratio? I figure it's between steel cable and the nylon type stuff used in some dog leashes, but I'm not sure which.

i'm writing a lab report of an experiment investigating strenth of hydrogen bond. An excess of cyclohexane was mixed with ethanol and there's a decrease in temperature of the mixture. I was told that upon the addition of cyclohexane, the H bonds between ethanol molecules were broken and I don't...

Hello, I have a 40 teeth gearing driving a 24 teeth gearing, and on the 24 teeth gearing attached another 24 teeth gearing to drive a 40 teeth gearing... The axle with two 24theeths are the left side of the CLAW, and the other is the Right. I noticed a problem is that it does not...

Who can give a detailed explanation? :cry:

whoever could give a detailed explanation? :frown:

I think I remember there being a formula to determine the Strength of an Electromagnet, but I just can't remember what it is, and i can't find it any where. of course the strength will depend on many things, # of coils, current, voltage?, Power? distance away from magnet and other things.

Can someone help me explain how a plate of metal's yield strength changes as it is 1) Rolled (flattened) then 2) Heated for some hours and cooled, and then finally 3) Cooled and rolled additionally. Does the yield strength increase at first, then drop, and then increase again? That's what I...

What is the electric field strength in a region where the flux through a: 1.0cm \times 1.0cm flat surface is: 65N\frac{m^2}{C}, if the field is uniform and the surface is at right angles to the field? [] []----> E [] Since the field points at a right angle to the surface we have a norm...

I need help with the following question. A diopole is made up of two charges, Q1 and Q2, that are separated by a distance of 1 meter. Q1 has a charge of +3C and Q2 has a charge of -3C. What is the electric field strength of the field set up by these two charges at a point exactly halfway...

What is the electric field strength at a point in space where a proton experiences an acceleration of 1 million "g"? I'm completely lost on this one I know it's bound to be something simple but I just can't figure out where to start with it, well other than that 1 million "g" should be...

I'm kinda stuck on this question: 1. Calculate the magnitude ofthe magnetic f ield at a point midway between two long, parallel wires that are 1 .0 m apar t and have currents of1 0.0 A and 20.0 A, respectively, ifthe currents are (a) in opposite directions and (b) in the same direction...

I am stuck on my physics homework. I can manage the latter question, how ever when i work out the first one my working out has no rhyme nor reason (nor a right answer). Any help will be great. A small metal sphere on an insulating rod is placed on a top pan balance, as shown in the diagram...

Given are two charges +1 X 10^-6 and one 3 X 10 ^ -6 distnace of 10 cm apart I know there is a poitn in between these two and it is 4 cm from the 1.0 X 10^-6 charge But i am asked to plot the elctric field strength as a function if the elctric field is pointing right, then positive...

Having a bit of a problem with this question, Find the minimum diameter of an alloy cable, tensile strength 75 MPa, needed to support a load of 15 kN. I know the answer is 1.6cm but i need someone to help explain how to get it. Ive got this far... Tensile strength of cable = 75 MPa...

Is gravity so weak because every force mediating boson starts out as a graviton, which then loses energy and becomes gluons,photons W and Z particles. This would mean that the graviton carries colour charge and so dark energy must emit gravitons with colour charge and therefore dark energy...

What is the difference between the meanings of the terms magnetic induction and magnetic field strength? thanks in advance...

Why is HSO3- a stronger acid then H2SO3? And also, i know that When the size of an atom X increases, the H-X bonds decreases, meaning the strength of the acid increases since more H+ are ionized. But when when H-X are more electronegitive, doesn't it mean the bonds between the H-X gets...

am to design an experiment showing how magnetic field strength of a magnet varies with its temperature. i know i can use a hall probe to measure the field strength - but how do i vary the temperature, and ensure that this is uniform throughout the magnet?

i am to design an experiment showing how magnetic field strength of a magnet varies with its temperature. i know i can use a hall probe to measure the field strength - but how do i vary the temperature, and ensure that this is uniform throughout the magnet?