Wednesday

April 16, 2014

April 16, 2014

Number of results: 91,805

**Physics**

Two small aluminum spheres, each having mass 2.65×10−2 , are separated by 85.0 . How many electrons would have to be removed from one sphere and added to the other to cause an attractive force between the spheres of magnitude 4.00×104 (roughly four ton)? Assume...
*Thursday, January 31, 2013 at 5:04pm by Julie*

**Physics**

1. The problem statement, all variables and given/known data A point charge is placed at each corner of a square with side length a. The charges all have the same magnitude q. Two of the charges are positive and two are negative, as shown in the following figure. The two ...
*Sunday, January 22, 2012 at 8:40pm by Eddie*

**physics**

two point charges q1=3uc and q2=-2uc are placed 5 cm apart on the x asix. at what points along the x asix in a) the electric field zero and b) the potential zero ?
*Sunday, March 3, 2013 at 10:19pm by yanis*

**physics**

Even if you can't remember the value of the Coulomb's Law constant (like me), try to remember these two important facts: (1) like charges repel; opoosite charges attract (2) The force between two charges is inversely proportional to the square of the distance, and is the same ...
*Thursday, March 12, 2009 at 11:09am by drwls*

**Physics**

Two identical point charges are fixed to diagonally opposite corners of a square that is 0.6 m on a side. Each charge is +2.5 µC. How much work is done by the electric force as one of the charges moves to an empty corner?
*Wednesday, August 31, 2011 at 8:24pm by Jim*

**Physics: Electricity and Magnetism**

The electric field contribution of the two opposite positive charges cancel out. The two charges on opposite sides that are of opposite sign will double the field due to a single charge. The center of the rectangle is at a distance R from corners that is given by the equation ...
*Friday, April 10, 2009 at 7:16pm by drwls*

**physics**

Four point charges have the same magnitude of 2.62 10-12 C and are fixed to the corners of a square that is 3.80 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square.
*Thursday, September 3, 2009 at 1:42pm by amber*

**Physics**

Charge 1 is 3 C , charge 2 is 15 C , the distance between the charges is 8 cm, and they are located in a vacuum. What is the magnitude of the electric potential (zero at infinity) at position *, i.e., exactly between the two charges?
*Friday, November 5, 2010 at 5:51pm by Maree*

**Physics**

A balloon rubbed against denim gains a charge of -8.0 uC. What is the electric force between the balloon and the denim when the two are separted by a distance of 5.0 cm? (Assume that the charges are located at a point!)
*Sunday, May 13, 2012 at 5:01pm by Kelsi*

**Physics**

A balloon rubbed against denim gains a charge of -8.0 uC. What is the electric force between the balloon and the denim when the two are separted by a distance of 5.0 cm? (Assume that the charges are located at a point!)
*Sunday, May 13, 2012 at 5:01pm by Kelsi*

**physics**

Two spheres with charges of 4.00nC and 3.00nC are placed 0.500m apart. At what point between the two charges must the third charge of 2.00cN be placed so that the net electrostatic force acting on this charge is zero?
*Thursday, April 5, 2012 at 1:33pm by Megan*

**physics**

Two point charges, q1 and q2, are placed 0.30 m apart on the x-axis, as shown in the figure above. Charge q1 has a value of –3.0 x 10–9 C. The net electric field at point P is zero Q: Calculate the magnitude of charge q2. Q: Calculate the magnitude of the electric force on q2 ...
*Thursday, February 23, 2012 at 4:09pm by Kayberlynn*

**Physics**

In a thundercloud there may be an electric charge of 18 C near the top of the cloud and −18 C near the bottom of the cloud. If these charges are separated by about 7 km, what is the magnitude of the elec- tric force between these two sets of charges? The electric force ...
*Friday, April 8, 2011 at 7:47pm by Jen*

**physic**

two point charges are located on the y axis as follows : charge q1 = -1.50nc at y= -0.600m, and charge q2 = +3.2nc at the origin (y=0) what is the net force (magnitude and direction) exerted by these two charges on a third charge q3 = +5.00 nc located at y = -0.400 m ?
*Tuesday, February 12, 2013 at 5:03pm by yanis*

**PHY**

. Four identical metal spheres have charges of qA = –8.0 µC, qB =–2.0 µC, qC = +5.0µ C, and qD = +12.0µ C. (a) Two of the spheres are brought together so they touch, and then they are separated. Which spheres are they, if the final charge on each one is +5.0 µC? (b) In a ...
*Sunday, February 17, 2013 at 1:58pm by Saif*

**Physics**

You are given two unknown point charges, Q1 and Q2. At a point on the line joining them, one-third of the way from Q 1 to Q2, the electric field is zero. Are Q1 and Q2 like or unlike charges? How many times greater is Q2 than on Q1? I am really confused on this problem. Please...
*Thursday, February 22, 2007 at 4:16pm by Nat*

**physics**

In a thundercloud there may be an electric charge of 54 C near the top of the cloud and −54 C near the bottom of the cloud. If these charges are separated by about 4 km, what is the magnitude of the electric force between these two sets of charges? The value of the ...
*Tuesday, February 19, 2013 at 10:06pm by hannah *

**Physics**

Two point charges of 8.7×10−6 C, on the left, and −2.7×10−6 C, directly to its right, are separated by 0.071 m. Find the electrostatic force acting on the charge on the left. A force to the right is taken as positive, while one directed to the left is negative.
*Monday, February 3, 2014 at 8:54pm by Anonymous*

**physics**

a +35x10^-6 C point charge is placed 32 cm from an identical +32x10^-6 C charge. how much work would be required to move a +50.0x10^-6 C test charge from a point midway between them to a point 12 cm closer to either of the charges? please show work and explain. i still don't ...
*Saturday, February 23, 2008 at 2:42pm by leess*

**Physics**

Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the electric field strength between them, if the potential 8.50 cm from the zero volt plate (and 1.50 cm from the other) is 540 V? (b) What is the voltage between...
*Sunday, March 23, 2014 at 11:35pm by Sam*

**physics**

Two slits are separated by 0.18 mm. An interference pattern is formed on a screen 80 cm away by 656.3-nm light. Calculate the fraction of the maximum intensity 0.6 cm above the central maximum.
*Tuesday, December 6, 2011 at 6:45pm by kuikui*

**Physics**

Two point charges lie on the x axis. A charge of + 6.5 µC is at the origin, and a charge of -1.5 µC is at x = 10.0 cm. What is the net electric field at x = -2.0 cm? I found the electrical field for each charge using the equation E= k(q)/ r^2. My calculations were: For the ...
*Saturday, July 7, 2007 at 4:26pm by micole*

**Physics**

Two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Each charge is 3.0E-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?
*Monday, October 11, 2010 at 2:49pm by Bob *

**physics**

A 23.6μC point charge lies at the origin. Find the electric field at the point (0.55m , 0). What is the magnitude of the electric field? Express your answers using two significant figures. Enter the x and y components of the field separated by a comma. Find the electric ...
*Tuesday, February 4, 2014 at 11:06pm by jrfannin*

**Physics**

Four identical metal objects each carry different charges. The charges are +1.6, +8.2, -4.8, and -9.4 ìC. These objects are brought simultaneously into contact, so that each touches the others. Then they are separated. What is the final charge on each object?
*Monday, April 19, 2010 at 8:27am by Anonymous*

**physics**

Two equals negatives charges (-1.75x10^(-19) Coulb) are separated by an insulator at a distance of 0.230 mm. Find the electrostatic force between these electrons?
*Wednesday, February 8, 2012 at 11:47pm by Anonymous*

**Physics **

Picture the following: A square with 4 point charges. Charges Q are diagonal from eachother, and charges -Q are diagonal from eachother. The length of each side is "a". One of the -Q charges is "kicked" away with an outward initial speed of V0, while the three other charges ...
*Saturday, February 12, 2011 at 5:50pm by Rachel*

**physics**

Two identical small spheres possessing charges q1 and q2 are separated by distance r. Which change would produce the greatest increase in the magnitude of the electrostatic force that one sphere exerts on the other? 1) doubling charge q1 2) doubling r 3) doubling r and charge ...
*Thursday, February 9, 2012 at 8:53pm by simin*

**physics**

A parallel plate capacitor is made of two 3.0 cm x 3.0 cm square plates that are separated by 1.0 mm are connected to a12.0 V battery. If and electron is released from the negative electrode, what speed will it reach by the time it arrives at the positive electrode?
*Thursday, February 10, 2011 at 10:44pm by So Confused*

**Physics**

If the two equal charges separated with one unit (one meter) has a force of 20 N. What will be the force if the distance is increased by 2 units (two meters)? What is the value of the new force compared to the old?
*Wednesday, December 5, 2012 at 11:19pm by Anonymous*

**Physics**

There are 3 charges situated on the x-axis: a +3.0 nC charge at (-3 cm, 0), a +4.0 nC charge at the origin (0, 0) and a -6.0 nC charge at (3 cm, 0). What is the electric potential at the point (0, 3 cm) on the y-axis?
*Thursday, February 10, 2011 at 10:46pm by Mr. Science*

**physics**

two identical point charges are fixed to diagonally opposite corners of a square that is .5m on a side. Ecah charge is +3.0x10^-6 C. How much work is done by the elctric force as one of the charges moves to an empty corner
*Wednesday, January 19, 2011 at 4:57pm by sasha*

**Physics**

Two identical +9.0 µC point charges are initially spaced 5.2 cm from each other. If they are released at the same instant from rest, how fast will they be moving when they are very far away from each other? Assume they have identical masses of 1.0 mg.
*Saturday, February 25, 2012 at 5:07pm by Jon*

**Capacitance (tricky)**

Two parallel plates of area 41 cm.^2 have equal but opposite charges of 2.60E-07 C. Within the dielectric material filling the space between the plates, the electric field is 5.80E+05 V./m. Find the dielectric constant of the material. Feel like there is a huge lack of ...
*Saturday, November 3, 2012 at 1:18am by andrew*

**Physics**

Two charges are placed on the x axis. One of the charges (q1 = +9.3 µC) is at x1 = +3.4 cm and the other (q2 = -20 µC) is at x2 = +8.9 cm. (a) Find the net electric field (magnitude and direction) at x = 0 cm. (Use the sign of your answer to indicate the direction along the x-...
*Monday, January 28, 2013 at 1:36am by Jasmine*

**Physics**

Two parallel, uniformly charged, infinitely long wires carry opposite charges with a linear charge density ? = 5 £gC/m and are 8 cm apart. What is the magnitude and direction of the electric field at a point midway between them and 49 cm above the plane containing the two ...
*Friday, February 17, 2012 at 2:27pm by Long*

**Physics: Electricity and Magnetism**

Four charges on a rectangle that is 6 cm by 3 cm. All but one of the corners has a positive charge. The magnitudes of the charges are all 8.40e-12 C. What is the net electric field at the center of the rectangle?
*Friday, April 10, 2009 at 7:16pm by Erica*

**physics**

Two point charges of 48 nC and -45 nC are held fixed on an x axis, at the origin and at x = 77 cm, respectively. A particle with a charge of 69 μC is released from rest at x = 49 cm. If the initial acceleration of the particle has a magnitude of 123 km/s2, what is the ...
*Friday, January 14, 2011 at 7:15pm by Anonymous*

**physics**

Three point charges are fixed in place in a right triangle. What is the electric force on the q = -0.63 µC charge due to the other two charges? (Let Q1 = +0.83 µC and Q2 = +0.9 µC.) what is the magnitude N, and direction in degrees ° above the positive x-axis?
*Sunday, January 22, 2012 at 3:16pm by john*

**math**

the lengths of the sides of four triangles are listed as follows. which two triangles are similar? explain. a~ 5 cm, 6 cm, 8 cm b~ 6 cm, 7 cm, 8 cm c~ 8 cm, 10 cm, 12 cm d~ 12 cm, 15 cm, 18 cm
*Saturday, December 4, 2010 at 1:23pm by Anonymous*

**physics**

Three point charges, q1, q2, and q3, lie along the x-axis at x=0, x=3 cm, and x=5 cm, respectively. Calculate the magnitude and direction of the electric force on each of the three points when q1=+6.0 muC, q2=+1.5 muC, and q3=-2.0 muC. I would add the forces. Watch direction. ...
*Wednesday, April 11, 2007 at 7:25pm by Mischa*

**physics**

The charges and coordinates of two charged particles held fixed in an xy plane are q1 = 2.32 Î¼C, x1 = 3.08 cm, y1 = 0.793 cm and q2 = -3.14 Î¼C, x2 = -1.75 cm, y2 = 1.05 cm. At what (a)x and (b)y coordinates should a third particle of charge q3 = 5.72 Î¼C be placed such that ...
*Thursday, February 16, 2012 at 12:08am by Antonio*

**Physics**

By what distance must two charges of +2 C and +10 C be separated so that the repulsive force between them is 3.70*10^10 N?
*Sunday, December 4, 2011 at 8:30pm by David*

**Electr. and Magnetism**

1) A charge of 80nC is uniformly distributed along the x-axis from x= 0 to x= 2.0m. Determine the magnitude of the electric field at a point on the x-axis with x=8.0m. a] 30 N/C b] 15 N/C c] 48 N/C d] 90 N/C e] 60 N/C 2) 3 point charges, 2 positive and one negative, each ...
*Monday, January 31, 2011 at 5:00am by Allan*

**physics**

Two charges separated by one meter exert 1 Newton forces on each other. If the magnitude of each charge is doubled, the force on each charge is ______ Newtons. Thanks!
*Sunday, July 20, 2008 at 10:35pm by Claire*

**Physics**

A small bead of mass m and charge q is free to move in a horizontal tube. The tube is placed in between two spheres with charges Q = − q. The spheres are separated by a distance 2a. What is the frequency of small oscillations around the equilibrium point of the bead? You...
*Tuesday, September 3, 2013 at 11:08am by Petra Tanovic*

**physics**

Two charges of -5 x 10(power -6) C and 3 x 10(power -6) C are placed at distance of 200mm from each other , find point on the line joining the charges at which electric field is zero.
*Wednesday, March 10, 2010 at 2:00pm by paula*

**Physics**

Two point charges +q=1 ìC and −q=−1 ìC with mass m=1 g are fixed at the positions ±r ⃗ 0 with |r 0 |=1 m . The charges are released from rest at t=0 . Find the time ô in seconds at which they collide.
*Wednesday, May 15, 2013 at 11:01pm by Sarah*

**Science**

Two point charges +q=1 ìC and −q=−1 ìC with mass m=1 g are fixed at the positions ±r ⃗ 0 with |r 0 |=1 m . The charges are released from rest at t=0 . Find the time ô in seconds at which they collide.
*Wednesday, May 15, 2013 at 11:06pm by Andrew*

**Physics**

Two point charges +q=1 ìC and −q=−1 ìC with mass m=1 g are fixed at the positions ±r ⃗ 0 with |r 0 |=1 m . The charges are released from rest at t=0 . Find the time ô in seconds at which they collide.
*Thursday, May 16, 2013 at 7:17pm by Anonymous*

**Physics**

Two concentric conducing spheres of radii 4 cm and 12 cm are given equal but opposite charges of 6 x 10^-8C. How much energy is stored in the system? How would I go about in beginning to solve this problem?
*Wednesday, March 5, 2008 at 3:03am by Jessica*

**Physics #66**

Two charges are placed on the x axis. One of the charges (q1 = +9.3 µC) is at x1 = +3.4 cm and the other (q2 = -20 µC) is at x2 = +8.9 cm. (a) Find the net electric field (magnitude and direction) at x = 0 cm. (Use the sign of your answer to indicate the direction along the x-...
*Friday, January 25, 2013 at 1:34am by Elizabeth*

**physics**

Two point charges +q=1 μC and −q=−1 μC with mass m=1 g are fixed at the positions ±r ⃗ 0 with |r 0|=1 m. The charges are released from rest at t=0. Find the time τ in seconds at which they collide.
*Tuesday, May 14, 2013 at 9:03pm by Anonymous*

**physics**

A 8.95 μC point charge is glued down on a horizontal frictionless table on the right. If is tied to a -6.35 μC point charge by a light nonconducting wire with length 2.5 cm on the left. The charges are placed in a external, uniform electric field with magnitude 1.65 ...
*Monday, February 3, 2014 at 10:22pm by Anonymous*

**Physics**

Two identical positive charges exert a repulsive force of 7.0 10-9 N when separated by a distance of 3.2 10-10 m. Calculate the charge of each. _C
*Friday, April 26, 2013 at 4:13pm by Mat*

**chemistry**

4e- + 7H+ + Cr2O72- = 2Cr3+ +7H20 Since you didn't write the entire equation I can't tell if everything is separated or not; however, the Cr half reaction is separated properly. The trouble you have in balancing is because you have assigned the wrong number of electrons. Cr in...
*Thursday, March 22, 2012 at 10:02pm by DrBob222*

**Physics 2 Charges what is the magnitude at point P**

Two charges, Q1= 3.20 microCoulombs, and Q2=5.90 microCoulombs, are located at points (0,-2.00cm) and (0,+2.00cm. What is the magnitude of the electric field at point P, located at (5.00cm,0), due to Q1 alone?
*Friday, February 11, 2011 at 8:34pm by Mike*

**7th grade math please help Ms. Sue **

4. Find the area for a triangle: base 14, height 5.5. (1 point) 19.5 cm² 77 cm² 38.5 cm² 770 cm² 5. Find the area of a parallelogram: base 5.2, height 2.3. (1 point) 10.6 cm² 12.96 cm² 5.98 cm² 11.96 cm² My answers: 4. 38.5 cm² 5. 11.96 cm²
*Wednesday, February 6, 2013 at 9:26pm by Delilah*

**Physics - Electromagnetism**

Let the point where E=0 be to the left from the charge q and separated by distance “x” from q and by distance (2+x) from -2q. Then kq/x²=k2q/(2+x)², x²-4x-4 = 0 x= 2±√(4-4) =2. The point where E=0 is x= - 2m. Let the point where φ=0 be to the right ...
*Tuesday, August 14, 2012 at 11:55pm by Elena*

**Physics**

Two point charges are placed on the x axis. The charge +4q is at x=3.00 m, and the -q charge is at x=-3.00. a) There is a point on the x axis between the two charges where the electric potential is zero. Where is this point? Found it to be: -1.80m b) The electric potential ...
*Saturday, February 12, 2011 at 5:46pm by Rachel*

**College Physics**

four particles are fixed along an x axis, separated by distances d = 2.70 cm. The charges are q1 = +3e, q2 = -e, q3 = +e, and q4 = +6e, with e = 1.60 × 10-19 C. What is the value of the net electrostatic force on (a) particle 1 and (b) particle 2 due to the other particles?
*Friday, July 6, 2012 at 10:41pm by Stephanie46*

**Physics**

Two charges 10uC (point A) and -10uC (point B) are placed 10cm from each other. Find the electric field at a point P perpendicular bisector of AB at a distance 12cm from the middle. Can someone get me started on this one? I'd appreciate any help. Thanks
*Thursday, January 31, 2008 at 10:03am by Riley*

**physics**

Two charges separated by a distance of 1 m exert a 1.0N force on each other. If the changes are pulled to a 3-m separation distance, the force on each charge will be
*Friday, April 19, 2013 at 1:04pm by Ashlee*

**Physics**

Hi, I solved this problem, but I want to make sure it is correct: 2 equal charges are separated by 3.7x10^-10m. The force between the charges has magnitude of 2.37x10^-3N.What is the magnitude of q on the charges? F= ( k x q x q)/ (r^2) F=2.37 c 10^3 N k= 9 x 10^9 r= 3.7 x 10...
*Monday, June 20, 2011 at 9:17pm by Anonymous*

**physics**

The center of the square is 5/sqrt2 = 3.535 cm from each corner. The fields due to the two +2nC charges at opposite corners will cancel out. The other two opposite charges will add, and the field will act along the diagonal between them. Calculate the E field due to the ...
*Saturday, February 6, 2010 at 2:20am by drwls*

**Physics**

Two identical point charges are fixed to diagonally opposite corners of a square that is 1.5 m on a side. Each charge is +2.0 µC. How much work is done by the electric force as one of the charges moves to an empty corner? I have W(fe)= -EPE=-q[V(f)-V(i)]. I can't figure out ...
*Tuesday, September 20, 2011 at 8:39pm by Traci*

**Physics **

Two charges q1 and q2 when separated by a distance r1 = R produce a force F1on each other. If the separation is increased to r2 = 2R, what is the new force F2 in terms of F1?
*Tuesday, February 8, 2011 at 10:55pm by Alex*

**Physics--diffraction**

Suppose you have measured the diffraction pattern of a grating with d = 0.09 mm and have found that the spots were separated by s = 1 cm. Now you want to determine d for an unknown grating. With the unknown grating, the spots are separated by s = 3.1 cm. What is d?
*Wednesday, November 3, 2010 at 12:28am by bre*

**Physics**

In a vacuum, two particles have charges of q1 and q2, where q1 = +3.8C. They are separated by a distance of 0.37 m, and particle 1 experiences an attractive force of 4.7 N. What is the value of q2, with its sign? Two spherical objects are separated by a distance of 1.45 × 10-3...
*Monday, August 26, 2013 at 1:45pm by Liz*

**Physics**

Two charged particles, q1 = −2.50×10−3 C and q2 = +3.700e-3 C, are separated by a distance of 5.00 cm. (a) What is the electric potential energy of this configuration? (b) What is the electric potential at a point midway between the particles? I have the answer to ...
*Thursday, May 31, 2012 at 10:35am by Sheree*

**Physics**

Two 0.20 g metal spheres are hung from a common point by non-conducting threads that are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is 20 degrees. How much charge was placed on each sphere?
*Thursday, April 15, 2010 at 12:09pm by Newberger*

**chemistry**

Why not plot the graph and see what you get? The pK value is the pH at the half-way point to the equivalence point. If you can identify the equivalence point, then take half that volume and read the pH for the pKa. If you have two equivalence points just do that twice. Could ...
*Monday, March 21, 2011 at 12:10am by DrBob222*

**physics**

Four charges with equal magnitudes of 6.50 x 10-15 C are placed at the corners of a rectangle. The lengths of the sides of the rectangles are 4.07 cm and 5.28 cm. Find the magnitude of the electric field at the center of the rectangle, assuming that three charges have the same...
*Thursday, February 9, 2012 at 5:26pm by Mike*

**Physics- repost**

Posted by jude on Saturday, February 6, 2010 at 2:20am. Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the electric field at ...
*Saturday, February 6, 2010 at 2:27pm by Sandra*

**physics**

What are the magnitude and direction of the electric field at a point midway between a -7.0 µC and a +6.0 µC charge 2.5 cm apart? Assume no other charges are nearby.
*Saturday, November 27, 2010 at 8:29pm by Anonymous*

**Physics**

Two metal spheres having charges of +4.0 x 10^-6 coulomb and +2.0 x 10^-5 coulomb, respectively, are brought into contact and then separated. After separation, the charge on each sphere is...
*Sunday, March 20, 2011 at 10:02pm by Dom*

**Physics**

In a vacuum, two particles have charges of q1 and q2, where q1 = +3.7 µC. They are separated by a distance of 0.22 m, and particle 1 experiences an attractive force of 3.5 N. What is q2 (magnitude and sign)?
*Wednesday, January 8, 2014 at 2:27am by Dee*

**Physics**

Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.24 m from the spot, while charge B is 0.37 m from it. Find the ratio qB/qA of the charges.
*Wednesday, June 13, 2012 at 8:10pm by Beth*

**Physics**

Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges. Help!
*Sunday, September 30, 2012 at 4:26pm by Anthony*

**Physics**

Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges. Help!
*Sunday, September 30, 2012 at 4:26pm by Anonymous*

**physics**

Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges. Help!
*Sunday, September 30, 2012 at 8:05pm by anthony*

**physics**

help! Two charges A and B are fixed in place, at different distances from a certain spot. At this spot the potentials due to the two charges are equal. Charge A is 0.22 m from the spot, while charge B is 0.54 m from it. Find the ratio qB/qA of the charges.
*Thursday, October 11, 2012 at 8:14pm by alex*

**math**

1) E 2) The first six numbers are separated by five; then there is a gap of two, and the last three are separated by 1.
*Tuesday, October 12, 2010 at 12:30am by drwls*

**physics**

Use Coulomb's law to get the force. F = k Q1 Q2/R^2 The Q's are the two charges. R is the distance between the charges, which is sqrt [2^2 + 3^2]= sqrt13 cm The direction of the force is along the vector from the 2*10^-6 charge to the 1*10^-6 charge, since it is a repulsive ...
*Friday, November 27, 2009 at 2:06pm by drwls*

**physics**

I have these problems that I keep doing and keep missing. If someone could please help me with what I am doing wrong! Two charges, -25 µC and +15 µC, are fixed in place and separated by 3.4 m. (a) At what spot along a line through the charges is the net electric field zero? ...
*Tuesday, February 2, 2010 at 2:42pm by jennifer*

**Geo (locus)**

I don't fully get this stuff but some of these I guessed on and some I think I;m close so will someone check/ help me please? * is the answer I put 1. Point A is 0.5 cm from j. k and k are parallel and 1 cm apart. Find the locus of points that are 0.75 cm from A and ...
*Saturday, June 12, 2010 at 1:19am by matt*

**physics**

Two identical positive charges exert a repulsive force of 6.6 multiplied by 10^-9 N when separated by a distance of 5.8 multiplied by 10^-10 m. Calculate the charge of each.
*Tuesday, January 13, 2009 at 6:41pm by Mara*

**Physics**

Two charges (+4C and -3C)are separated by .00002m. What is the electrostatic force and its direction? Using Coulomb's law, I arrived at 2.696 x 10^20 J. Would the direction be said to be "towards the positive charge"? Is this correct? Thanks
*Wednesday, January 30, 2008 at 6:29pm by Riley*

**Physic **

The field of an unknown charges is first mapped with a 1.0 X 10^-8 C test charges, then repeated with 2.0 X 10^-8 C test charge. a) would the same forces be measured with the two test charges (Explain)? b) would the same fields be determine using the two test charges (Explain)?
*Friday, August 17, 2012 at 9:35pm by sara*

**physics**

Two point charges +q=1 μC and −q=−1 μC with mass m=1 g are fixed at the positions ±r⃗ 0 with |r0|=1 m. The charges are released from rest at t=0. Find the time τ in seconds at which they collide.Hint: Can you do it without integrating by using ...
*Monday, May 13, 2013 at 12:18pm by stranger*

**PHYSICS**

a. A 25 nC particle and a – 7 nC particle is interacting with each other at a certain distance. Find the force between the two charges @ 3.0 cm and 1.0 cm Calculate and draw each of the particle’s electric fields. Calculate the electric potential values of the two particles. ...
*Thursday, August 18, 2011 at 8:28pm by KAIT*

**physics**

A current I=2.3 A flows around a continuous path that consists of portions of two concentric circles of radii a and a/2, respectively, where a=6 cm, and two straight radial segments. The point P is at the common center of the two circle segments. Calculate the components of ...
*Friday, April 26, 2013 at 11:19am by sat*

**physics**

Two point charges, 3.4 μC and -2.6 μC, are placed 1.6 cm apart on the x-axis. At what points along the x-axis is (a) the electric field zero (b) the potential zero?
*Monday, March 1, 2010 at 8:07pm by electric field*

**physics**

Two particles, each of mass 6.00 kg and speed 4.67 m/s, travel in opposite directions along parallel lines separated by a distance 4.89 m. What is the magnitude of L, the angular momentum of the two-particle system around a point midway between the two lines?
*Thursday, April 7, 2011 at 11:40pm by john*

**physics**

Two particles, each of mass 3.00 kg and speed 5.41 m/s, travel in opposite directions along parallel lines separated by a distance 3.15 m. What is the magnitude of L, the angular momentum of the two-particle system around a point midway between the two lines?
*Monday, April 1, 2013 at 8:06am by safc*

**physics**

This question is pretty weird, but basically what you want to do is set these two charges up in an equation with the distance and have them equal to zero. K(q_1)/(r+2.8)^2 - k(q_2)/r^2 = 0 q_1 - the first (negative) charge q_2 - the second (positive) charge r - this is the ...
*Tuesday, January 23, 2007 at 6:34pm by Galen*

**Physics**

When two unequal point charges are released a distance d from one another, the heavier one has an acceleration a. If you want to reduce this acceleration to one-fifth of this value, how far (in terms of d) should the charges be when released?
*Wednesday, July 8, 2009 at 10:32am by Sarah*

**physics 2**

A charge, q1, of +4.4 micro-coulombs and another unknown charge, q2, are surrounded by a surface. The total flux through the surface is -9.2 x 106 (N m2)/C. These charges are now placed on the x axis. q1 is placed at x = 0, and q2 is placed at x = +114.51 cm. What is the ...
*Friday, January 25, 2013 at 2:42pm by Jessica *

**physics**

10. The following three point charges are placed on the x axis: +5.0 mC at x=0; +4.0 mC at x= -40 cm; and +6.0 mC at x= +80 cm. Find (a) the electric field magnitude and direction and (b) the electric potential at x= +10 cm. a) E = k(5E-6)/.102 +k(4E-6)/.502 - k(6E-6)/.702 = +...
*Monday, January 11, 2010 at 2:55am by tv*

**maths --plse help me..**

without using set square or protacter construct 1. triangle A BC WITH AB = 5.5 CM , BC = 3.2 CM CA = 4.8 CM 2. DRAW LOCUS OF A POINT WHICH MOVES SO THAT IT IS ALWAYS A DISTANCE OF 2.5 CM FROM B. 3. DRAW LOCUS OF POINT SO THAT IT IS EQUIDISTANT FROM BC & CA . 4. MARK POINT OF ...
*Friday, December 28, 2012 at 11:43am by Anonymous*

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