Net Definition and 1000 Threads

Homework Statement Two short magnets of equal dipole moments M are fastened perpendicularly at their centres as shown. The magnetic field (magnitude) at a point P, distant d from the centre on the bisector of the right angle is ...

A) If the moon of mass mM has radius RM and the distance between the centers of the Earth and the moon is REM, find the total gravitational potential energy of the particle-earth and particle-moon systems when a particle with mass m is between the Earth and the moon, and a distance r from the...

Homework Statement Write the net ionic equation for the following reactions: 1). Excess 6 M HNO2 is added to 1 M Na2CO3. Na2CO3 displays 2eq/mol 2). Nitric Acid is added to Zinc metal. The products are nitrogen monoxide and zinc ion. Homework Equations NA The Attempt at...

Homework Statement A uniform, solid cylinder with mass M and radius 2R rests on a horizontal tabletop. A string is attached by a yoke to a frictionless axle through the center of the cylinder so that the cylinder can rotate about the axle. The string runs over a disk-shaped pulley with mass M...

G'day all, I have been reading that if there are no external torques on a system, then angular momentum will be conserved. Can a system be defined as anything or only a single rigid object. Could I define the "system" as 2 disks rotating side by side? If so then the total angular momentum of...

if a ball is thrown and caught at the same height with constant horizontal velocity and no vertical displacement is its initial and final velocity the same? since v2y^2=v1y^2+2aDy, no displacement means final vertical velocity will be the same as initial, since v2x=v1x, horizontal velocity...

Homework Statement A long, straight wire carries a current of 14A. Next to the wire is a square loop with sides 1.0m in length, as shown in the figure. The loop carries a current of 2.5A in the direction indicated. http://img69.imageshack.us/i/walker2260.jpg/ Calculate the magnitude of...

Homework Statement A basketball player dunks the ball and momentarily hangs from the rm of the basket. Assume that the player can be considered as a 95.0kg point mass at a height of 2.0m above the floor. If the basket rim has a spring constant of 7.4 x 10^3 N/m, by how much does the player...

I was looking at a situation where a fridge in the back of a truck is just about to tip back due to the truck's acceleration. I am looking at the moment just before it tips. The net torque here is 0 since it is not yet tipping back. I thought I was allowed to pick any axis I wished and so picked...

I'm trying to calculate the acceleration of an object but first I need to calculate the net force. For this question we were told Fnet = Fa-Fd-Ff.. just wondering what Fd is? Thank you in advance.

Homework Statement 1.) An 11 kg block is being pushed forward on a flat surface with a force of magnitude 45 N. The coefficient of kinetic friction is 0.12 and the coefficient of static friction is 0.15. What is the accleration of the object, and what is the net force acting on the object...

Homework Statement The Attempt at a Solution There were 4 parts to find net capacitance across AD, FE, AE and AO I need help with AO and i don't have any idea how to do it

Hi everybody. Apologies for asking what may be a very simple question, but in every textbook I've read, they say that the net flux through an area dA from an isotropic emitter is zero. But it also says that the sun is an isotropic emitter. Now hold on, the net flux from the sun is clearly...

I was always wondering, on very short distances/high energies, what is a net effect of having not one (gamma) but two (gamma and Z) 'carriers' for the 'force' between 2 charged particles. Does it make an interaction sronger or not?

G'day, Just wondering if someone can explain to me how when an object is moved to a higher point above the earth, if initial velocity = final velocity, the net work done is zero? The way I see it the object now has a greater gravitational poitential energy and although no kinetic energy is...

This is probably a simple question but it has absolutely annoyed me for a week at University (yes, I know, I am still learning this, laugh away). I am meant to identify the atom/ion and the net charge of it. This is the information I am given: Protons: 9 Neutrons: 10 Electrons: 20...

Hey All I'm going to implement a tennis net for a video game. I already have the animation of the net in place (I think) through cloth simulation. What's missing is a physics simulation of the collision between the ball and the net? I think the net could be modeled as an elastic rectangular...

' a mass of 450 grams is given an acceleration of 8cm/s/s. Calculate the net force required. so confused, the only question i couldn't get was this one.

Homework Statement A 12 kg brick moves along an x axis. Its acceleration as a function of its position is shown in Fig. 7-37. What is the net work performed on the brick by the force causing the acceleration as the brick moves from x = 0 to x = 5.2 m...

Homework Statement A closed surface with dimensions a = b = 0.254 m and c = 0.4064 m is located as in the figure. The electric field throughout the region is nonuniform and given by ~E = (α + β x^2)ˆı where x is in meters, α = 4 N/C, and β = 6 N/(C m2). Picture of object attached...

Homework Statement Where on the x-axis would the net force on a (-2) micro Coulomb charge be zero? *picture attached* Homework Equations F = k*(q1q2)/d^2 The Attempt at a Solution I think the answer is d= 6, making the position on the x-axis = 7. However, when solving my equation, I have...

Homework Statement See figure attached. Homework Equations The Attempt at a Solution I'm confused as how to calculate the net magnetic force that acts on the loop. Do I choose a point somewhere and calculate the magnetic force with respect to that? Because I don't quite...

Hi folks, I am in the energy industry, and we do linear/multilinear regressions stats. One of the concepts being introduced to supplement standard way of doing regressions is make use of: (1) Coefficient of Variation Root Mean Squared Error (2) Net Mean Bias or Abs (Mean bias)...

If a sphere has a net charge of zero, then it experiences no electric field right? But if you bring a + charged rod it, the electrons experience a field and all move towards it. But the net charge for the sphere is still zero since same number and electrons cancelling out. So do we say the...

Homework Statement Find the net electric flux through the spherical closed surface shown in the figure below. The two charges on the right are inside the spherical surface. (Take q1 = +1.96 nC, q2 = +1.03 nC, and q3 = -3.09 nC.) https://www.webassign.net/serpse8/24-p-006-alt.gif The...

Homework Statement calculate net outward flux of vector field F(x,y,z)=3xy^2 i +xcosz j +z^3k, across surface solid bounded by cylinder y^2 +z^2 =1 planes x=-1, x=2 Homework Equations The Attempt at a Solution my attempt was triple integral of divF=> 3*triple integral r^3 ended...

Homework Statement A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 55.0 kg and air resistance exerts a total upward force of 620 N on her and her parachute. A.) What is the weight of the parachutist? B.)...

I have been working on an idea for a little while.. A large hurdle in planning for this idea is that I need to figure out what the net gravitational pull would be on a 17,200km long cable going from a geosynchronous orbit around Mars to the surface of the planet would be. Its basically...

Homework Statement A solid cylinder of radius r1 = 2.5 cm, length h1 = 5.1 cm, emissivity 0.90, and temperature 28°C is suspended in an environment of temperature 46°C. (a) What is the cylinder's net thermal radiation transfer rate P1? (b) If the cylinder is stretched until its radius is r2...

I don't really know how to solve this problem. I only know how to calculate the net force on B, not A... here is the problem: sphere A is located at the origin and has a charge of +2.0x10^-6 C. Sphere B is located at +.6m on the x-axis and has a charge of -3.6x10^-6 C. Sphere C is located...

Homework Statement The circuit is a resistor (200 ohms) and a capacitor (200 nF) in series, and that is in parallel with an inductor. Homework Equations [tex]$Z=j \omega L$[\tex] [Gah, how do I make the latex render?] The Attempt at a Solution I'm not really sure where to start with this...

Homework Statement A point charge +2Q is at the origin and a point charge -Q is located along the x-axis at x=d. Find a symbolic expression for the net force on a third point charge +Q located along the y-axis at y = d Answer = k\frac{Q^2}{d^2}<\frac{1}{2\sqrt{2}}, 2 -...

Homework Statement Four charges Aq,Bq,Cq, and Dq (q = 5.00 × 10-7C) sit in a plane at the corners of a square whose sides have length d = 83.0 cm, as shown in the diagram below. A charge, Eq, is placed at the origin at the center of the square. DATA: A = 2, B = 4, C = 7, D = 4, E = -5...

Homework Statement A ball (hollow sphere) of radius .11m and mass .444kg is mounted on a frictionless axle. A massless cord is wrapped around the ball supporting an object of mass .02kg. Find the angular acceleration of the wheel, linear acceleration of the object and tension in the cord...

Homework Statement Three point charges lie along the x axis. The positive charge q1 = 15.0uC and is at x = 2.00m (2.00 away from the origin), the positive q2 = 6.00uC is at the origin. The net force on q3 which is between q2 and q1 is 0. What is the x coordinate of q3? solution My...

Homework Statement See figure attached for problem statement as well as the figure given. Homework Equations The Attempt at a Solution If a throw a third charge 3 into the mix the forces on each charge should be as follows: \vec{F_{1}} = \vec{F_{13}} + \vec{F_{12}}...

hi everyone! I would love to learn more about physics. Please help me define the term "net polarization". Thank you very much.

What will be the technology difference between neural net based processor and the Microprocessor based on VLSI technology we use today?

http://online.wsj.com/article/SB10001424052748703395204576023452250748540.html?mod=googlenews_wsj So according to this, tomorrow the FCC begins expanding regulations over the Internet in the name of protecting Internet freedom. I can understand the arguments by the proponents of Net...

Is it possible to use net work in the power formula? If a car accelerates from v1 to v2, can you use Power = Worknet / time And if Wnet = \DeltaKE Would Power = \DeltaKE / time ?

Homework Statement I am doing a Gr. 11 Physics project and my task is:Determine the net force acting on a ball as it rolls down a ramp. m= 46.7 d(horizontal of ramp/length)= 92.5cm h (height of the ramp from floor to tallest point)= 45.0cm time for ball to roll down= 0.61s Homework...

Homework Statement http://edugen.wiley.com/edugen/courses/crs4957/art/qb/qu/c13/fig13_37.gif Masses m are the same on the bottom, and the net gravitational force is 0 on m4 which is located at the center of an equilateral triangle. What is the mass of M? Homework Equations Fg=GmM/r^2...

Homework Statement Consider a charge of +2.0 µC placed at the origin of an X-Y co-ordinate system and a charge of -4.0 µC placed 40.0 cm to the right. Where must a third charge be placed – between the charges, to the left of the origin, or beyond the second charge – to experience a net force of...

1. STATEMENT Calculate the net torque about a fixed pointfor 2 different forces given the angles of the applied forces. 2. MY QUESTION what is the net force, meaning how do i fint it? and what do i do wit the information given? Do i use T=r x F...

Homework Statement a box of mass 5.0 kg is accelerated from rest across a floor at a rate of 2.0m/s^2 for 7.0s. find the net work done on the box. Homework Equations f = ma w= fdcostheta The Attempt at a Solution f = ma f=10 w = fdcostheta w=10d w=10*v*t w=10*v*7...

Homework Statement A man in a wheel chair is being pushed up a slope, for a distance of 10 metres. He is moving at a constant velocity. What is the net work done when he reaches the top of the slope? Homework Equations W = FX The Attempt at a Solution I just seem to have...

Homework Statement What is the net force acting on a 5kg suitcase when picked up with 60N of force? what is the applied force? What is the acceleration of the suitcase? Homework Equations ma=? The Attempt at a Solution I'm not even sure on how to start the equation all I know...

Homework Statement Not really a homework problem, but I have a conceptual question assume a uniform Electric field in a direction, meaning Electric field does not change by location if you have any objects, the total electric reflux is always 0? Homework Equations Electric reflux=...

Homework Statement Two point charges are placed on the x axis: +5 microC charge at x=0 and +8 microC charge at x=0.9m. Where on the x-axis can a third charge be placed so that the net charge on all three charges is zero? Determine the magnitude of the third charge. Homework Equations...

Homework Statement The graph below shows the component (Fcos(theta)) of the net force that acts on a 5.0 kg block as it moves along a flat horizontal surface. Find (a) the net work done on the block and (b) the final speed of the block if it starts from rest at s = 0. The graph shows...