Strength Definition and 1000 Threads

guys, here's my question: A long solenoid has circular cross section of radius R. The solenoid current is increasing, and as a result so is the magnetic field in the solenoid. The field strength is given by B = bt, where b is a constant...

Homework Statement A heavy conductor (mass m, length l, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field B is now imposed. The acceleration of gravity is 9.8 m/s^2. I'm going to...

simple question: is the magnetic field of uniform strength at all points inside a solenoid?

Homework Statement Okay so, we weren't given much of a question other than "Prove the Earth's GFS is 9.81 N/KG" So what I'm asking is, with the data that I have collected, is how I go about doing this? As it stand we set up an experiment with the ticker tape machine, rolled the little buggy...

Homework Statement Three point charges are located at the corner of an equilateral triangle. The Coulomb constant is 8.98755 X 109 N*m2 / C2 What is the strength of the electrostatic force on the top charge? Answer in units of N. Length of each side is .19m Photo...

A chain always breaks ath the weakest link. Right? Hypothetical: Where would a chain break if all the links were of equal strength, shape, shape, size... equal in every way. Ignore all tolerance rules, this is hypothetical! Thanks!

Homework Statement The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons orbit the magnetic field at 2.4 GHz, and as they do so they emit 2.4 GHz electromagnetic waves. a) what is the magnetic field strength? b) if the maximum diameter of...

Homework Statement What is the approximate electric field strength of the electromagnetic waves radiated by a 100-W light bulb, measured 3.0m from the bulb? Homework Equations $$\vec{E}=\frac{kq}{d^{2}}$$ $$P=\frac{2kq^{2}a^{2}}{3c^{3}}$$ The Attempt at a Solution I solved for...

How do I know that the resultant filed strength acts toward Y? Thank you

Homework Statement q=4.0x10^-6C, 8.0x10^-6C d=2m Homework Equations Two charges of +4.0x10^-6 C and +8.0x10^-6C are placed 2.0m apart. What is the field strength halfway between them? The Attempt at a Solution netEa= (9.0x10^9)(4.0x10^-6C) + (9.0x10^9)(8.0x10^-6C)...

The electric field strength is 1.70×104 inside a parallel-plate capacitor with a 1.40 spacing. An electron is released from rest at the negative plate. What is the electron's speed when it reaches the positive plate? Help please...

Knowing the portion of the link BD has a uniform cross-sectional area of 800mm^2, determine the magnitude of the load P for which the normal stress in that portion of BD is 50 Mpa. (Hint draw a free body diagram of the link ABC) http://img137.imageshack.us/img137/9845/problmezf4.png sorry for...

1. A 0.180g plastic bead is charged by the addition of 0.700 x 10^10 excess electrons. What electric field strength will cause the bead to hang suspended in the air? 2. Is amount of excess electrons the exact same as the charge of the bead?? 3. I am sure you use F=qE. But I am...

Heres my given problem: Gauge Length = 2 in. Area = 0.5 in^2 The specimen yields under a load of 32,000 lb The corresponding gauge length is 2.0083 (the 0.2 yield point) Max load = 60,000 lb @ gage length = 2.60 in I need to determine the yield strength, modulus of elasticity, and...

Homework Statement An electron moving to the right at 3% the speed of light enters a uniform electric field parallel to its direction of motion. The electron is to be brought to rest in the space of 6.0cm. What is the strength of the field?______N/C Homework Equations F = q * E The...

Homework Statement A. What is the strength of the electric field at the position indicated by the dot? (X=2.84 cm, s=5.37 cm, q=5.5 nC.) B. What is the direction of the electric field at the position indicated by the dot? Specify the direction as an angle (in degrees) above or below...

I am trying to repair my 1920s pier and beam house and have a situation where I need to slide under two butted beams on top of a post the thinnest steel I can that will support the two beams. What would help me determine this would be a general idea of how to compare the strength of a flat...

Homework Statement A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 1*10^6V/m/s. What is the magnetic field strength 3.0 cm from the axis? Homework Equations B= uo/(2*pi) *r/R^2*(Chang in Q/ change in...

Well I have this lab on electric field lab and what I did was measure the voltage from different distances on a parallel plate. So when I plotted the graph Voltae vs. Distance, I got a linear line and the equation was y = 85x (somewhat like that disregarding the y-intercept). My concern is what...

Hi, folks, I'm an aspiring Mechanical Engineer, & as such am very new to the subject of stress, strain, etc. I'm designing an assembly using a hi-performance polymer that has the following characteristics: Tensile Strength, 73°F 10.1 kpsi (10,100 psi) Tensile Modulus (E) 340 kpsi...

Hello, everyone! I have a question, and i don't know how to solve it... They ask me for the dielectric strength! How do i find it?

Calculate the ionic strength of Ca2+ in a 0.01M CaCO3 solution. equation to use is: u=0.5 sum(Mi)(zi)^2 where M is the concentration and z is the charge of the species my question is when I am calculating the ionic strength of Ca2+, do I have to include CO3^2- that is in that...

This is a strange one: 1. The problem statement It is known that the strength of the muscles is proportional to the area of their section. In other words, if the muscles are two times more thick, they have four times greater strength.Explain why people cannot grow indefinitely tall...

what are the magnitude and direction of the electrical field strength at point Z in the situation below? negatively charged sphere, x(-2.0*10-5C) is left most, 60 cm to the right of it is a positively charged sphere,Y (8.0*10-6C). Point Z is 30 cm to the right of Y. What I did: First i...

Homework Statement What is the ultimate tensile strength if necking begins at a true strain = 0.25 in a material whose stress strain curve obeys the relation: sigma=120000(epsilon)^1/2 psi? Homework Equations The Attempt at a Solution I'm kind of stumped on this. I really...

Hi there, I am currently looking to measure the tensile strength using Young’s Modulus for steel and brass. My results I have obtained are comparable with published values of E. My question is regarding the formulae, the one I used was: E = F/x X l/a Where a is the original cross section...

Homework Statement differance between tensile and yield strength. please help. Homework Equations The Attempt at a Solution

Homework Statement With the Earth's electric field the strength of the field at the Earth's surface is 100 V/m. Now I think that means 100 volts per vertical meter height. My question is what is the strength of the Earth's electric field per meter^2 on horizontal Earth's surface...

if an electron is accelerated closer and closer to the speed of light, will its magnetic field grow forever or will it approach a limit?

[SOLVED] Tension: Force + Velocity. Breaking Strength. Homework Statement The tension at which a fishing line breaks is commonly called the ``breaking strength''. What minimum breaking strength is needed for a fishing line to stop a salmon that weighs 90.0 N in 18.0 cm if the fish is moving...

Hey, I'm doing my science fair project on how much force can an egg withstand from one direction without cracking and i want to know if the color has anything to do with it. My mom says that she has heard that it is just the breed and i have looked up the question on the internet and it says...

Homework Statement (a) Find the altitude above the Earth's surface where Earth's gravitational field strength would be two-thirds of its value at the surface. Assume re = 6.371 103 km. km (b) Find the altitude above the Earth's surface where Earth's gravitational field strength would be...

Homework Statement a) Find the altitude above the Earth's surface where Earth's gravitational field strength would be two-thirds of its value at the surface. Assume re = 6.371 103 km. __________ km (b) Find the altitude above the Earth's surface where Earth's gravitational field strength...

Homework Statement The strength of gravity on the moon is 1/6 of that on earth. If a ball is thrown straight upward on the moon with initial velocity Vo the ratio of the height it reaches to the height it would reach on earth, if also thrown upward with velocity Vo is: 2 1/6 6 depends on Vo...

Question Charges at three corners of a square are shown in Figure P26.34, in which n = 9. To answer the following questions, use the letters k, Q, q, L, and m. IMAGE IS LOCATED HERE: http://www.webassign.net/knight/p26-34.gif a) Write the electric field at point P in component form. b)A...

A bucket of water with mass 6.00 is accelerated upward by a cord of negligible mass whose breaking strength is 66.0 .

Ionic Strength...help I am taking Biochemistry. However, the prof talked about Inoic Strength in class. This is the example, u = 1/2 (Molarity) (ionic charge )^2 Example... .10M CaCl2 u = 1/2 (.10)(+2)^2 + (.20)(-1) ^2 u = 1/2 ( .40 + .20 ) = .30 I opened my Chemistry...

with an odd shaped magnet eg a cone .. apex = N / base = S is the strength of the magnet the same at each pole ?

Homework Statement What are the magnetic field strength and direction at the dot in Figure Ex32.8, in which v = 3.0*10^7 m/s? Figure Ex.32.8 is attached to the this post. r = 0.02828 m m0/4pi = 10^-7 T v = 3.0*10^7 m/s q = 1.60217653*10^-19 C Homework Equations Biot-Savart Law...

can anyone describe wat is dB level. can dB level be showed through receiver or field strength meter? thx for helping

Homework Statement A magnetron is a microwave source in which a "bunch" of electrons travel on a circular orbit in a uniform magnetic field. As the electrons pass the electrodes, a high-frequency alternating voltage difference occurs. Suppose the resonant frequency is f = 2.82×10^10 s-1...

I have investigation on measuring the factors the signal strength from the transmitting antenna. I have some idea about measuring the signal strength. Is it true to use field intensity meter to measure signal strength with the unit of volts per metre? Thank you for helping out.

Hello everybody, I'm having difficulty understanding the rationalization behind the strengths of Bronstend Lowry acids and bases and my textbook isn't too helpful. Can someone please expalin to me: (1) What exactly is effective negative charge density? (2) how does electronegativiy correspond to...

why does magnetic field strength decrease much faster than the inverse square of the distance like gravity? Is it because the force lines have to curve back to the source? Is magnetism also carried by an "imaginary" particle? Thanks. Mr Beh

Hi, Kinda new here so here goes. I have been asked to drawn a graph B(magnetic field) vs Tan theata and find its slope, ok no problem there. The next question has asked me to use the value of the slope to obtain the value of the strength of the Earth's magnetic field in the region :eek...

There is this characteristic time associated with the decay of particles; ~10^-16s for electromagnetic decay, ~10^-23s for strong decay and >10^-13s for weak decay. Now I know that the decay time is to first order inversely proportional to the coupling constant squared (from a first order...

Tensile Strength of 4" square RV Bumper I'm building a Class II style hitch for mounting on a 4" square RV Bumper. The RV bumper wall thickness is around .090 thousands. The bumper is welded perpendicular to a couple box frames on 60" centers. I intend to mount the hitch directly to the center...

Hello. This is my first time here, so let me know if I'm doing anything wrong "posting-wise." Homework Statement The electric potential in a region of space is V= (260 x^2 - 180 y^2) V, where x and y are in meters. What is the strength of the electric field at (2.00 m, 3.00 m) ? x =...

1) Methods/equipment for radioactivity detection. For my high-school Chemistry studies, needs clarification. Geiger counter: A small chamber contains a high voltage electric field inside filled with inert gas. When ionizing particles/radiation enters the chamber, it will ionise the...

Homework Statement In the attachment Homework Equations The Attempt at a Solution I have been solving this question for quite some time but I can't get the answer yet. I offset all the forces to point C and I get the following values: Moment at y-axis, M(y) = 10Nm Moment at...