Magnitude Definition and 1000 Threads

Homework Statement Homework Equations \vec{F} = k\stackrel{q1q2}{r^{2}} The Attempt at a Solution 6.022e23*(0.505) = 3.041e23C <-- electrons 6.022e23*(0.495) = 2.981e23C <-- protons 3.041e23 - 2.981e23 = 6e21C <-- the difference between the two charges \vec{F}_{e} =...

1. *Is my solution correct? Homework Statement A positively charged particle of mass 7.2 X 10^-8 kg is traveling due east with a speed of 85 m/s and enters a 0.31T uniform magnetic field. The particle moves through one-quarter of a circle in 2.2 X 10^3 seconds, at which time it leaves the...

Homework Statement http://imgur.com/fvNbE Part a needs to have up to 2 significant figures. For part b. you need to find theta or the degrees counter clockwise from +x direction.Homework Equations Coulombs Law: F = 9(10^9) |q1q2|/r^2 r = distance in meters of two chargesThe Attempt at a...

Homework Statement A 10 cm long, 1 cm diameter solenoid contains 500 turns of wire. A current that varies as I = 5Sin(100πt) Amps flows through the solenoid wire. Calculate the magnitude of the magnetic flux at the centre of the solenoid as a function of time using equation (1). Compare this...

A 10-H inductor, 200-Ω resistor and a capacitor C are in parallel. find C if the magnitude of the impedance is 125Ω at ω=100rad/s Now i attempted to solve it by first doing the parallel combination of the inductor and the resistor. Then i would do the parallel combo of these with the...

Two 1.0g beads are charged equally and placed 50cm apart. When released, they begin to accelerate at 150m/s2. What is the magnitude of the charge on each bead? The equations I used: F = ma F = kQQ / r2 I was just wondering about the mass. Do I have to use the total mass (2.0g) for both...

1.we know that generally, every force systems can be replaced by a resultant force(R) and a couple(M) at a point O. the position of point O is optional. but magnitude and direction of M is dependent to this point while magnitude and direction of R is independent. In static equilibrium R and M...

In each situation below, electric charges are arranged at the corner of a square. Each charge Q has the same magnitude with the signs indicated in the diagrams. Rank the electric potential from most positive to most negative, and the magnitude of the electric field at the center of the square...

A car us driven at a velocity of 72km/h EAST for 0.50hr, 48km/h NORTH for 0.25hr, and 62km/h WEST for 0.50hr. Calculate the magnitude of its displacement. Attempt at the solution: Distance = Speed * Time (72 x 0.5) + (48 x 0.25) - (62 x 0.5) = 17km However, the answer in the book...

From the attached image, the net force on the 1.0mC charge is zero. What is the sign and magnitude of the unknown charge q? Here is what I did: F = k QQ / r2 F = 9.0x109Nm2/C2*(0.002C)*(0.001C) / (0.05m)2 F = 7.2 x 106N Then to look for the unknown charge: F = k QQ / r2 Q = F* r2 / k Q Q =...

Homework Statement At a high point in the Earth’s atmosphere, He2+ ions in a concentration of 2.8 x 10^12 m^-3 are moving due north at a speed of 2.0x10^6 m/s. Also, a 7.0 x 10^11m^-3 concentration of (O2)- (dioxygen -)ions is moving due south at a speed of 7.2 x 10^6m/s. Determine the...

1. An electrically charged macroscopic spherical oil drop of mass M=5.449x10^(-14) kg is released from rest between two electrically charged horizontal plates that produce a uniform electric field magnitude of E=1.667x10^6 N/C that is directed vertically upward. If, after release, the oil drop...

Hello everyone! I just was reading Your questions and was interested in IAO problems. There are only problems without solutions of 2011 year in the net, but i found IAO 2005 problems. So i can not understand how to solve some of them. Like humans, astronomers of venus use the same method...

a soccer ball is kicked with an initial speed of 10.2 m/s in a direction 25 degrees above the horizontal. Find the magnitude and direction of its velocity 0.250 seconds and 0.500 seconds after being kicked. Is the ball at its gratest height before or after 0.500 seconds?

Homework Statement A block of mass 50 kg is free to slide on a frictionless inclined plane that makes an angle of 20° with respect to horizontal. A force F is applied as shown in the drawing pulling parallel to the incline. As a result, the block accelerates up the plane at 4 m/s2. known...

Homework Statement Calculate the magnitude of the net force on an air parcel of mass 1.0x10-3kg which is at a temperature 250K and which is in the US standard atmosphere at an altitude of 4.0km. Take the lapse rate as 6.5K/km and the surface temperature as 288K Homework Equations Force =...

Homework Statement In Fig. 22-31 the four particles are fixed in place and have charges q1 = q2 = 3e, q3 = 2e, and q4 = -10e. Distance d = 5.42 μm. What is the magnitude of the net electric field at point P due to the particles? Homework Equations E=1/(4πε0) x [ q4/2d^2-q3/d^2] j...

Homework Statement Three parallel wires carry a current of I 1 = 3 A, I 2 = 2 A, and I 3 = 1 A, respectively. They are arranged as shown. If r = 2m and L=5m,what is the magnitude of the net force on the bottom wire? <------------------------- I1 r -------------------------->I2 2r...

A rectangular loop of wire measures 1.0 m by 1.0 cm. If a 7.0-A current flows through the wire, what is the magnitude of the magnetic force on the centermost 1.0-cm segment of the 1.0-m side of the loop? Fm = ILBsin of angle Fm = Magnetic force I= Electric current L= Length of...

I need help on how to solve this Homework Statement Three vectors, expressed in Cartesian coordinates are : S -> x( -3.5), y(+4.5) T -> x(0), y(-6.5) U -> x(+5.5), y(-2.5) what is the magnitude of the resultant vector S + T + U? The answer, according to my answer sheet is 4.9...

Hello my name is Brendon. I'm a graphic designer currently studying an MA. My major project is based around Eames' Power of 10 film and more recently the Huang twins Scale of the Universe website. I'm trying to reproduce these ideas in print, using folding to represent the orders of...

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting for at least 1 ms will cause injury...

[b]1. Five charges of 1.00 μC magnitude are placed in a row, each charge being 1.00 m distant from its neighboring charges. If all chargers are positive, what is the magnitude in N/C, of the electric field at the position of charge 4? A) 0 B)2.13x10^-2 C)3.25x10^-3 D)3.25x10^3 E)2.13x10^4...

Homework Statement An electric dipole is defined as two point charges separated by distance L. Consider point P with coordinates (x,0). A dipole along the x-axis is separated by distance a from the origin. q- is closer to point P Find: 1) Electrostatic potential due to dipole at point P 2)...

Homework Statement A plane flies 425 km east from city A to city B in 40.0 min and then 954 km south from city B to city C in 1.70 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d) direction of its...

Homework Statement The x component of vector is -16.2 m and the y component is +54.6 m. (a) What is the magnitude of ? (b) What is the angle (in radians) between the direction of and the positive direction of x? Homework Equations magnitude of vector is sqrt of a^2+b^2 direction...

Homework Statement v = (-4, -2) and need to find alll vectors of magnitude 4 that are perpindicular to v Homework Equations The Attempt at a Solution I tried let (x, y) be the vector of interest. -4x -2y = 0 x^2 + y^2 = 16. Is this the right track? If so, how do i...

the question is to find the magnitude and phase angle of the resistor voltage in the circuit below : http://img513.imageshack.us/img513/1035/ee204.jpg i want you guy's to check my solution please . thanks .

The question is "Make a simple estimate of the order of magnitude of the ratio of the cross sections (electron,positron->2photons) and (electron,positron->3photons)" Now I know that cross section is proportional to (1/q^4)*(Phase space factor)*(Coupling constant) where q^2 = E^2 - p^2. We are...

General question: Is the magnitude of the poynting vector equal to the intensity of an electromagnetic wave? I know that I= average S which makes me think that I cannot simply assume that that their magnitudes are equal!?

Homework Statement A very thin disk of non-conducting material initially holds a charge QO = +5 μC that decreases with time t as Q(t) = QO e-t/τ where τ = 10 seconds. If the disk has a radius of 0.10 m, what is the magnitude and direction of the magnetic field at the circumference of...

Homework Statement A uniform magnetic field B is confined to a cylindrical volume of radius 0.080m. B is directed into the plane of the paper and is increasing at a constant rate of (delta)B/(delta)t=0.300 T/s. Calculate the magnitude and direction of the current induced in a circular wire...

Homework Statement I have this function: G(w)=\frac{1}{j\omega\tau+1} I want to find the magnitude Homework Equations S=\alpha+j\beta magnitude(S)=\sqrt{\alpha^{2}+\beta^{2}}[b]3. The Attempt at a Solution [/b What i did was carry out the division, so i got...

Homework Statement There's a spherical capacitor, inner radius a and outer radius b, with a filling in between of epoxy, and also connected to battery of voltage V. What is the capacitance? Also, what is magnitude of surface charge density outer shell? Homework Equations For Q1...

Hi I have read that LPF (or HPF) have magnitudes which fall at the rate of 20dB/decade from the corner frequency onwards. Why is it assumed this way although the slope is changing with frequency? Thanks Salil

Homework Statement A steel rod with a length of l = 1.55 m and a cross section of A = 4.52 cm^2 is held fixed at the end points of the rod. What is the size of the force developing inside the steel rod when its temperature is raised by ∆T = 41.0 K? (The coefficient of linear expansion for steel...

Homework Statement http://desmond.imageshack.us/Himg37/scaled.php?server=37&filename=physicsh.jpg&res=medium Homework Equations B = \frac{μI}{2πr} The Attempt at a Solution B = \frac{μ(12)}{2π(0.4m)} - \frac{μ(12)}{2π(0.1)} B = -1.8 x 10-5I'm not sure if I am doing this correctly, am I...

Question says. Two objects of mass 2kg each are attached to each other by a massless string. One moves vertically and the other is moving on a frictionless surface horizontally and is being pulled the opposite direction by a force of 10 N at 60 degrees to the horizontal get the acceleration of...

A car is traveling counterclockwise along a circular bend in the road with an effective radius of 180 m. At a certain instant, the car’s speed is 26 m/s, but it is slowing down at a rate of 1.0 m/s2. What is the magnitude of the car’s acceleration? I thought it was v^2/r but that isn't the...

Homework Statement A square loop, with sides of length L, carries current i. Find the magnitude of the magnetic field from the loop at the center of the loop, as a function of i and L. Homework Equations B=μ0/4∏∫i * dl X r^ /r^2 The Attempt at a Solution

Homework Statement Suppose that the magnetic field of the Earth were due to a single current moving in a circle of radius 1758 km through the Earth's molten core. The strength of the Earth's magnetic field on the surface near a magnetic pole is about 6. 10^-5 T. About how large a current would...

Homework Statement 3 identical charges of 2.0 uC are placed on the x-axis. The first charge is at the origin, the second to the right at x = 50cm, and the third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin...

Hi all, on a current homework I have been given a transfer function and asked to draw the straight-line (asymptotic) magnitude (dB) and phase (degrees) Bode plot. I first learned Bode plots roughly a year ago, and while being on spring break and my notebook from last year is at school, I'm...

Homework Statement An observer 5pc away observes the sun in the plane of Jupiter orbit. He cannot resolve either object but he notices a slight dimming of the star when Jupiter passes across the sun in his vision. Find the magnitude of the sun with and without Jupiter in front of it...

Hey all. Looking at the following link http://starizona.com/acb/ccd/projectsfaint.aspx , the page says that limiting magnitude is mostly a function of aperture.(First paragraph in the Project Ideas section) I'm wondering why that is. Doesn't skyglow increase at the same rate as the light from...

Homework Statement question is attached with threadHomework Equations The Attempt at a Solution Is attached with thread. I tried solving by creating a moment at a point, which I did at 2 separate points points to give me the same answer, which I would expect, however it is not the answer I am...

Homework Statement A rectangular loop with dimensions 4.2 cm by 9.5 carries current I. The current in the loop produces a magnetic field at the center of the loop that has magnitude 5.60×10−5 T and direction away from you as you view the plane of the loop.Homework Equations...

I'm not entirely sure of my answer, if it's wrong could some one point me in the right direction? Homework Statement A 140g ball is falling through the air at 36 meters per second (constant speed) prior to time 0. The ball impacts the floor at time 0. The ball decelerates until time 0.012...

Question: A point charge is moving with speed 2 x 107m/s along the x axis. At t=0, the charge is at x= 0m and the magnitude of the field at x=4m is B0. The magnitude of the magnetic field at x= 4m when t= 0.1μs is:The equation and my attempt at solving it is in the attachment. --I also converted...

Homework Statement Calculate the magnitude of the magnetic field from the previous table (see attachment). Homework Equations The Attempt at a Solution I've been googling for an answer but can't find how to obtain the magnitude of the magnetic field with the Intensity I and...