Friday

April 18, 2014

April 18, 2014

Number of results: 44,801

**Physics Important please**

Four charges are arranged at the corners of a regular tetrahedron (a pyramid with four sides that are identical equilateral triangles). The charges are 1 Coulomb each, and the sides of the tetrahedron are all 1 meter. How much energy in Joules is required to assemble this ...
*Friday, November 8, 2013 at 9:41pm by rosan*

**Physics**

A converging or positive lens is required, with a power such that when an object is placed 25 cm in front of the lens, the lens forms a virtual image. The image distance di= 60 cm, so that this image serves as an object for the eye at the eye’s near point. Taking into account...
*Monday, May 28, 2012 at 8:27pm by Elena*

**Physics**

A converging or positive lens is required, with a power such that when an object is placed 25 cm in front of the lens, the lens forms a virtual image. The image distance di= 60 cm, so that this image serves as an object for the eye at the eye’s near point. Taking into account ...
*Tuesday, May 29, 2012 at 2:42am by Elena*

**Proofs and numbers**

Prove the following theorem: Suppose p is a prime number, r, s are positive integers and x is an arbitrary integer. Then we have x^r identical to x^s (mod p) whenever r is identical to s (mod 11).for x belongs to an integer
*Wednesday, November 28, 2012 at 10:53am by yin*

**physics**

Two point charges are placed along a horizontal axis with the following values and positions: +3 µC at x = 0 cm and - 12 µC at x = 35 cm. At what point (the coordinate) along the x axis is the electric field zero? Expess the answer (in cm) with one decimal place.
*Tuesday, September 11, 2012 at 3:27am by AJ*

**algebra 1**

plse help me 24 (-3,-4) (3,-2) 27 (3,-8) (-2,5) 30. 0.2,1.1) (7,3) a line passes throught the given point. write an equation for the liine in point slope form. then rewrite the euqation in slope intercept for plse help me with these three
*Wednesday, November 12, 2008 at 7:55pm by Amy*

**english**

english - y912f, Wednesday, May 27, 2009 at 9:52pm we almost never learn the private thoughts or motives of any character but Alice. this is a clue that the point of view in the story is a. first person b. third-person limited c. third-person omniscient d. that of the ex-wife ...
*Wednesday, May 27, 2009 at 9:50pm by Anonymous*

**Physics**

Require than m * g = q * E q is the charge. m is the mass in kg. g is the acceleration of gravity, in m/s^2. E is the field strength, in N/C Solve for the field, charge, q, in Coulombs. The charge must be negative so that the upward electrical force can balance the weight.
*Monday, January 30, 2012 at 9:22pm by drwls*

**Physics**

Two tiny spheres, one with a charge of -17mc and the other with a charde of +3mc are positioned with the positive charge 14cm above the negative. What is the magnitude and direction of the force on the negative charge?
*Friday, April 13, 2012 at 1:58am by Anonymous*

**Physics**

a) Use Gauss' Law for the surface charge density in coulombs/m^2. The front and back surfaces will have equal and opposite charge densities, since the net charge is zero. b) Multiply the answer in a) by the plate area, 0.25 m^2.
*Friday, September 18, 2009 at 9:15pm by drwls*

**Science**

Two identical twins marry two identical twins. Will their offspring look the same?
*Friday, March 7, 2014 at 11:23pm by Lynda*

**physics**

A point charge of -7.9 microcoulomb is at the origin. What is the electric potential at (3.0, - 3.0)?
*Monday, January 24, 2011 at 10:36pm by Cassie*

**physics**

is the force on a point charge due to electromagnetic fields. thanks!!
*Monday, April 16, 2012 at 4:40am by Christy*

**Physics**

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
*Thursday, November 29, 2012 at 3:07pm by Karl*

**Physics**

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
*Sunday, December 2, 2012 at 12:13pm by Martha*

**Physics**

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
*Sunday, December 2, 2012 at 4:24pm by Savannah*

**Physics**

What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
*Tuesday, December 4, 2012 at 12:13pm by Adam*

**algebra 2 (#3 of 4)**

Rewrite as 3c^4(c^3 -27) = 0 This is true if either c=0 or c^3 = 27 27 is the cube of 3, so c=3 is the other solution.
*Saturday, February 23, 2008 at 6:17pm by drwls*

**Math 5/6**

2^3 = 8, 3^3 = 27, and (-1)^3 = -1, so (-2/3)^3 = -8/27. The exponent can be distributed among the various components, as they are all multiplied. So, -(-2/3)^3 = 8/27
*Tuesday, August 18, 2009 at 5:57pm by Marth*

**physics**

Three charges are fixed to an x, y coordinate system. A charge of +12 µC is on the y axis at y = +3.0 m. A charge of -14 µC is at the origin. Lastly, a charge of +50 µC is on the x axis at x = +3.0 m. Determine the magnitude and direction of the net ...
*Sunday, January 21, 2007 at 2:09pm by Ann*

**6th grade**

98.13 divided by 24.27 First move the decimal point two places over in the divisor to make a whole number. Next move the decimal point over two places in the dividend. Put a decimal point in the quotient directly above the point in the dividend. That gives you 9813 / 2427 ...
*Tuesday, October 21, 2008 at 5:51pm by Ms. Sue*

**5th grade math (dividing fractions)**

3/(x/9) = 3*(9/x) = 27/x so, now you have 27/x = 27/5 x = 5
*Sunday, December 9, 2012 at 7:26pm by Steve*

**Physics**

Two charges, -15 and +4.5 µC, are fixed in place and separated by 2.8 m. At what spot along a line through the charges is the net electric field zero? What would be the force on a charge of +1 µC placed at this spot?
*Monday, January 23, 2012 at 5:11pm by Anne*

**physics**

true or false a small plastic ball has an excess negative charge on it. if a magnet is placed close to this ball, it will either attract or repel the ball, depending upon which pole is closer to the ball.
*Friday, March 9, 2012 at 7:35am by fatih*

**Physics**

A 5.0 µC point charge is moved within an electric field and has an electric potential energy change of 10.0 J. What is the electric potential difference before and after the charge was moved? Show work. (µC = 1.0 × 10–6 Vq=energy so delta V must be 10 volts. What do I do NOW?
*Saturday, May 19, 2012 at 3:06pm by Pat*

**Physics**

Two idencial point charges (q = 7.40 x 10^-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.440m. A test charge (q = -2.30 x 10^-8 C), with a mass of 7.25 x 10^-8 kg, is released from rest at one of the empty corners of the square. Determine the...
*Wednesday, February 3, 2010 at 6:39pm by Allee*

**physics**

A uniform electric field ofmagnitude 384 V/m is directed in the positive x-direction. Suppose a 16 ìC charge moves from the origin to point A at the coordinates, (20 cm, 60 cm). What is the absolute value of the change in potential from the origin to point A? Answer in units of V
*Monday, January 23, 2012 at 12:44am by robert *

**Physics**

idential point charges of 1.7e-6 C are fixed diagonally on opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing their magnitudes. Find the sign and ...
*Sunday, March 15, 2009 at 11:39pm by andrea*

**physics**

A magnetic field has a magnitude of 1.20 10-3 T, and an electric field has a magnitude of 5.50 103 N/C. Both fields point in the same direction. A positive 1.8-µC charge moves at a speed of 2.60 106 m/s in a direction that is perpendicular to both fields. Determine the ...
*Tuesday, February 8, 2011 at 10:04pm by aml*

**physics**

You meet a person with prescription glasses of +1.74 dpt. What is the near point of this person? Express the result as a positive number! Hint: the near point of a healthy person is 25 cm. An object placed at this distance will form an image at the near point of the person. 1....
*Tuesday, April 27, 2010 at 2:20pm by lauren*

**algebra**

That's a lot of work since 3^3 = 27, 3^-3 = 1/27 so, log_3(1/27) is thus -3
*Friday, March 1, 2013 at 5:17pm by Steve*

**Maths**

The trick is to recognize that 8 and 27 are cubes of 2 and 3, respectively. So take the cube roots first, as follows (8/27)^(2/3) = [(8/27)^(1/3)]^2 = (2/3)^2 = 4/9
*Sunday, September 16, 2007 at 11:33am by drwls*

**physics**

What can we conclude from the attractive nature of the force between a positively charged rod and an object? 1. The object has no net charge. 2. Cannot be determined. 3. The object does not have an appreciable negative charge. 4. The object does not have an appreciable ...
*Saturday, February 20, 2010 at 7:49pm by Anonymous*

**Physics**

A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...
*Sunday, October 31, 2010 at 8:24pm by Scott*

**Physics**

Wb = 2.8kg * 9.8N/kg = 27.44 N. = Wt. of block. Fb = 27.44N.[56.6o] = Force of block. Fp = 27.44Sin56.6 = 22.91 N. = Force parallel to the incline. a. cos56.6 = F/27.44 F = 27.44cos56.6 = 15.11 N. b. Fv = 27.44cos56.6 = 15.11 N. = Force perpendicular to the incline = normal.
*Thursday, May 9, 2013 at 9:37pm by Henry *

**Physics**

Consider a conducting spherical shell with inner radius b = 0.862 m and outer radius c = 1.21 m. There is a net charge q2 = 3.82 ìC on the shell. At its center, within the hollow cavity, there is a point charge q1 = 2.89 ìC. Determine the flux through the spherical Gaussian ...
*Sunday, March 20, 2011 at 10:34am by Alicia*

**Physical Science**

A charge of +2 X 10^-7 C is 10 cm from a charge of -6 X 10^-6 C. Find the magnitude and direction of the force of each charge. Could someone help me with this problem. I dont know what to do.
*Sunday, September 25, 2011 at 4:12pm by Jackson (please help)*

**physics**

Find the electric potential energy for the following array of charges: charge q1 = +3.0 µC is located at (x, y) = (0.0, 0.0) m; charge q2 = +3.0 µC is located at (4.0, 3.0) m; and charge q3 = −1.0 µC is located at (0.0, 3.0) m.
*Tuesday, January 31, 2012 at 8:50pm by anybody?*

**Chemistry**

Choose the true statements regarding the charge-minimized Lewis structure(s) of the BrO2- ion. (selet all that apply) a. There is only one charge-minimized structure for this ion. b. There are two charge-minimized resonance structures for this ion. c. The formal charge on the...
*Sunday, October 5, 2008 at 11:04pm by Lindsay*

**Physics**

A charge of 3.75 10-9 C is located 3.1 m from a charge of -3.10 10-9 C. Find the magnitude of the electrostatic force exerted by one charge on the other.
*Saturday, March 14, 2009 at 3:39am by Sonam*

**electricity and magnets**

A thick metal slab carries a current I. A uniform magnetic field B points perpendicular to the slab (and into the page). If point P on the slab is at a higher potential than point , what can we say about the charge carriers that produce the current in the slab?
*Tuesday, December 17, 2013 at 5:36pm by Anon*

**College Physics**

A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...
*Sunday, October 31, 2010 at 1:53pm by Scott*

**PHYSICS**

All answers are wrong. At least, if this were not multpile choice then, reasonably speaking, a teacher would have to mark any of the answers as "not correct". The reason why the charge spreads out uniformly is because a non uniform charge distribution gives rise to a electric ...
*Wednesday, April 8, 2009 at 1:26pm by Count Iblis*

**calculus**

when x=2 , y = 1 when x = 4, y = 27 average rate of change between those points = (27-1)/(4-2) = 13 f'(x) = 3x^2 - 8x + 6 f'(3) = 27 - 24 + 6 = 9
*Saturday, October 15, 2011 at 8:39pm by Reiny*

**Physics Important please**

If the 3e charge is at the origin and the Magnesium nucleus is 3cm from the origin in the +x direction, at what position (in centimeters) along the x-axis should an electron be placed so that it (the electron) experiences no net force? x =
*Friday, November 8, 2013 at 2:10pm by sied*

**Physics**

Consider a disk of radius 2.6 cm with a uniformly distributed charge of +3.6 µC. Compute the magnitude of the electric ﬁeld at a point on the axis and 3.3 mm from the center. The value of the Coulomb constant is 8.98755 × 10^9 Nm2/C2. Answer in units of N/C Compute the...
*Thursday, September 1, 2011 at 6:04pm by Monica*

**Physics**

The figure below shows two pint charges, each of -2Q, fixed on the y-axis at y = +a and at y = -a . A third points charge -Q is placed on the x-axis at x = 2a . Express all algebraic answers in terms of Q, a, and fundamental constants. (a) What is the net force (magnitude and ...
*Sunday, September 5, 2010 at 6:08pm by David*

**PHYSICS **

1. Why is an electric field considered to be a vector quantity? 2. Draw the electric field around an electric dipole of +1 µC and -1 µC 3. How many electrons have been removed from a positively charged object if it has a charge of 1.5 x 1011 C? 4. A particle with a charge - 1....
*Friday, December 21, 2012 at 2:33am by Hayden*

**Physics**

The following questions use a central charge of q1=+2x10^-4C 1. What is the field strength at a distance of 5m from the central charge? I got 7.2x10^4 However, I'm not sure which unit to use... is it joules? 2. What is the force acting on another charge (+5x10^-4C) which is 5m...
*Friday, April 17, 2009 at 10:52pm by Lucy*

**Physics 212**

potential energy is a scalar. Take the first charge, move it. No energy change to move it. Then move in the second charge, energy = kqq/d. Now move the third charge in. It is opposed by the two other charge, energy= kqq/r * 2 add the energies: 3kqq/r check my thinking.
*Thursday, February 14, 2013 at 7:49pm by bobpursley*

**Physics**

Three identical masses of 700 each are placed on the x axis. One mass is at = -100 , one is at the origin, and one is at = 370 . What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? Take the gravitational constant to be = ...
*Thursday, February 7, 2013 at 2:20pm by Tamar*

**Physics**

initial distance is (1/2)(.10)(30^2) = 45 at that point, v = at = 3 m/s so, after the bump in acceleration, s = 45 + 3t + (1/2)(.2)t^2 when s=200, we have 45+3t+.1t^2 = 200 t = 27.131 by then, v = 3 + .2*27.131 = 8.43 m/s
*Monday, September 9, 2013 at 2:31am by Steve*

**Physics**

Sphere W (with an initial charge of zero) is touched to sphere A and then they are separated. Next, sphere W is touched to sphere B (with an initial charge of -26e) and then they are separated. Finally, sphere W is touched to sphere C (with an initial charge of 46e), and then ...
*Thursday, January 19, 2012 at 4:15pm by Phil*

**Pre-Calculus**

12. 3 / 12 = 3 / ( 3 * 4 ) = 1 / 4 5 / 15 = 5 / ( 5 * 3 ) = 1 / 3 ( x + 3 / 12 ) / ( 4 x - 5 / 15 ) = ( x + 1 / 4 ) / ( 4 x - 1 / 3 ) = ( 4 x / 4 + 1 / 4 ) / ( 4 x * 3 / 3 - 1 / 3 ) = [ ( 4 x + 1 ) / 4 ] / [ ( 12 x - 1 ) / 3 ] = ( 4 x + 1 ) * 3 / [ 4 * ( 12 x - 1 ) ] = ( 3 / 4...
*Wednesday, April 10, 2013 at 12:19am by Bosnian*

**Physics concept question**

A long straight horizontal wire carries a current I = 2.10 A to the left. A positive 1.00 C charge moves to the right at a distance 4.50 m above the wire at constant speed v = 2250 m/s. What are the magnitude and the direction of the magnetic force on the charge? h t tp:// ...
*Monday, March 7, 2011 at 2:10pm by Robert*

**chemistry**

A piece of solid carbon dioxide, with a mass of 7.4 g, is placed in a 4.0-L otherwise empty container at 27°C. (a) What is the pressure in the container after all the carbon dioxide vaporizes? 1.0atm (b) If 7.4 g solid carbon dioxide were placed in the same container but it ...
*Monday, November 1, 2010 at 8:42pm by Mattie*

**chemistry**

4 moles CO, 5 moles N2 and 2 moles C2H4 are placed in a 5 liter vessel at 27 degree celsius . the ratio of kinetic energy per molecule of CO2, He and NH3 is
*Thursday, May 17, 2012 at 2:04pm by kanika*

**chemistry**

4 moles CO, 5 moles N2 and 2 moles C2H4 are placed in a 5 liter vessel at 27 degree celsius . the ratio of kinetic energy per molecule of CO2, He and NH3 is
*Thursday, May 17, 2012 at 2:06pm by kanika*

**Physics**

Consider a ring of radius a containing q amount of negative charges. Derive an expression for the electric field strength at a point at a distance x on the axis of this charged ring. Hence prove that at a great enough distances, the charged ring behaves like a point charge.
*Thursday, August 11, 2011 at 10:58am by Ashik*

**physics**

A charge of 3.75 10-9 C is located 3.1 m from a charge of -3.10 10-9 C. Find the magnitude of the electrostatic force exerted by one charge on the other. a)increases or b)decreases or c)remains the same
*Saturday, March 14, 2009 at 3:35am by Sonam*

**physics**

x is 0.70 m from the 6 mC charge, 0.50 m from the 4 mC charge, and 0.10 m from the 5 mC charge I also do not understand why the number "0.002" was added to those distances (in meters). It appears to be a misprint.
*Monday, January 11, 2010 at 2:55am by drwls*

**CHEM**

Cations have a positive charge as in K^+, Na^+, Ca^+2, etc. Anions have a negative charge as in SO4^-2, Cl^-, Br^-, etc. What you have listed are neutral charge which means they are molecules.
*Tuesday, January 25, 2011 at 7:35pm by DrBob222*

**Organic Chemistry**

--Why does caffeine have a larger Rf value than chlorophyll? --If two compounds have the same Rf under identical conditions. Does this show that they have identical structures? Explain.
*Thursday, October 23, 2008 at 9:52pm by James*

**Physics**

A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point?
*Tuesday, September 21, 2010 at 2:54pm by Ignatius*

**9th grade algebra**

oops sorry i havn't done this in a while thanx bobpursley -6-(-2-5^2)= =-6-(-2-25)= =-6-(-27)= (negatives cancel) =-6+27= =27-6= =21
*Sunday, September 13, 2009 at 10:28am by venessa*

**physics**

A charge of 2.4 nC and a charge of 5.0 nC are separated by 33.30 cm. Find the equilibrium position for a -4.1 nC charge.
*Monday, January 11, 2010 at 8:09pm by joe*

**physics**

A charge of 3.0 nC and a charge of 5.8 nC are separated by 53.40 cm. Find the equilibrium position for a -4.7 nC charge.
*Tuesday, May 1, 2012 at 5:06pm by Haley*

**algebra**

30D=810 check =D=810/30 108*.05+27*.1=8.1 =D=27 5.4+2.7=8.1 8.1=8.1 x=y*4 x=27*4 x=108 y=27
*Sunday, May 17, 2009 at 1:23pm by bob sanhowyour*

**math**

From the Periodic Table, 1 mole of aluminum weighs 27.0 g., Therefore; If 54.0 g of aluminum are placed into the beaker to react with copper(II) chloride, how many grams of the metal product will be produced?
*Thursday, January 12, 2012 at 9:35pm by chris*

**Physics - net force on charges**

Three charged particles are located at the vertices of a right angled triangle. Charge A(5.0*10^-6) has Cartesian coordinates of (0,4); Charge B(-5.0*10^-6) is at the origin; Charge C(4.0*10^-6) has coordinates (5,0),where the coordinates are in meters. What is the net force ...
*Monday, October 18, 2010 at 7:10am by Anonymous*

**physics**

please check: Two point charges, initially 1 cm apart, are moved to a distance of 3 cm apart. By what factor do the resulting electric and gravitational forces between them change? a. 9 b. 3 c. 1/3 d. 1/9 D Two positive charges, each of magnitude q, are on the y-axis at points...
*Saturday, March 14, 2009 at 8:44pm by physics*

**Physics last question**

A charge of 23.6 is located at (4.37 m, 5.94 m), and a charge of -10.7 is located at (-4.53 m, 6.77 m). What charge must be located at (2.19 m, -2.91 m) if the electric potential is to be zero at the origin?
*Wednesday, November 10, 2010 at 2:40am by rudi*

**physics electricity**

(a) Work done by the field is MINUS the change of potential energy. So the EPE change is -6.40*10^-3 J Since they are asking for EPEA - EPAB, that is +6.40*10^-3 J. (b) Divide the previous answer by the charge, 1.64*10^-4 C (c) Point A has higher potential, since work was done...
*Sunday, January 3, 2010 at 11:43pm by drwls*

**math**

Larry and Shamir want to build identical houses. They bought a rectangular piece of land and divided it into two identical squares.Each square piece of land has a area of 2500 meter squared. What is the perimeter of the original rectangle?
*Tuesday, April 9, 2013 at 3:52pm by Eugene *

**Physics**

Assuming I did it correctly: F=ma mass = the mass of the electron = 9.11 * 10^-31 kg a= 115 m/s plug in your known variables F will equal 1.05 * 10^-28 Newtons (N) Next, F=qE q equals the charge of the electron, or "point charge". q=1.6 * 10^-19 C Solve for E, so E=F/q plug in...
*Monday, March 1, 2010 at 8:02pm by Jason*

**algebra**

I assume you need to solve these equations simultaneously ? 3x + 5y = 0 2x - 5y = -9 Solving by elimination method. The object is to eliminate one of the variables, either x or y. Since you have +5y in the first equation and -5y in the second equation, you ADD the two ...
*Tuesday, January 25, 2011 at 4:48pm by helper*

**chem**

It means a partial negative charge or a partial positive charge. Placing a - sign or a + sign (with no small delta in front of either) means you are assigning a full -1 charge (or a -2 or -3 or any other number yu place there) to that atom or end of the molecule. The partial ...
*Wednesday, July 8, 2009 at 7:46pm by DrBob222*

**physics**

An object with a net charge of 35 µC is placed in a uniform electric field of 643 N/C, directed vertically. What is the mass of the object if it floats in the electric field?
*Friday, February 5, 2010 at 9:22pm by carla*

**physics**

An object with a net charge of 21 µC is placed in a uniform electric field of 590 N/C, directed vertically. What is the mass of the object if it "floats" in the electric field?
*Friday, April 15, 2011 at 1:47pm by Shannah*

**physics**

There is a +4 microCoulombs (ìC) charge at each of 3 corners of a square (each side 58. mm long). What is the force on +10 microCoulombs (ìC) placed at the center of the square?
*Thursday, February 9, 2012 at 11:45am by jason*

**Math**

hmm. "sum" is addition, which is commutative. That means that 27+y = y+27 Your suggestion is good, in that it follows the wording of the problem, but the value is the same as y+27.
*Monday, September 10, 2012 at 10:18am by Steve*

**Hard physics**

The potential at any point is the sum of the potentials due to the two separate charges. (that is the thing about potentials, they add) due to charge 1 k = 1/(4 pi eo) Q = 5 u C U1 = k Q /((x+.1)^2+y^2)^.5 due to charge 2 U2 = k Q /[( x-.1)^2 +y^2) ]^.5 so at (0,0) U = U1 + U2...
*Sunday, March 3, 2013 at 6:57pm by Damon*

**Calculus**

did you make a sketch? did you notice that (6,8) is the farthest right-most point of your region? So I will find the volume of the cylinder with radius 8 and height of 6, then subtract the region we don't want cylinder = π(8^2)(6) = 384π radius of region we don't ...
*Tuesday, January 31, 2012 at 7:58pm by Reiny*

**physics**

If a negative charge is initially at rest in an electric field, will it move towards a region of higher potential or lower potential? What about a positive charge? How does the potential energy of the charge change in each case?
*Sunday, May 27, 2012 at 5:57pm by myra*

**physics - charge**

A 80.0 g block carrying a charge Q = 33.0 µC is connected to a spring for which k = 74.0 N/m. The block lies on a frictionless, horizontal surface and is immersed in a uniform electric field of magnitude E = 4.84 104 N/C directed away from the spring and block. The block is ...
*Saturday, July 10, 2010 at 11:44pm by lo*

**physics**

a charge of 7.2 nC and a charge of 6.7 nC are separated b 32 cm. Find the equilibrium position for a -3.0 nC charge.
*Sunday, November 15, 2009 at 10:23pm by abbigail*

**Physical Science**

A charge of +2 X 10^-7 C is 10 cm from a charge of -6 X 10^-6 C. Find the magnitude and direction of the force of each charge.
*Sunday, September 25, 2011 at 3:37pm by Jackson*

**math,algebra,help**

can someone explain to me why (3)/(5) and (27)/(45) are equivalent fractions. If you simplify 27/45 by dividing the numerator and the denominator by 9 you will get 3/5. 27/25/9 27/25*1/9=3/5 3/25=3/5 5*3=3*25 15=75 75/15=3 If u multiply 3/5 by 9/9 you get 27/45 Oh didn't even ...
*Sunday, March 4, 2007 at 1:52am by jas20*

**Phsyics**

The electric field is constant in magnitude and direction for the following arrangement of fixed charges: -Close to a point charge -Close to a dipole -Far from a dipole, i.e., at a distance greater than 10 times the charge seperation distance d of the dipole -Around the ...
*Friday, February 5, 2010 at 7:00pm by Sandra*

**physics**

Two loudspeakers are placed above and below each other and driven by the same source at a frequency of 3.70 102 Hz.An observer is in front of the speakers at point O, at the same distance from each speaker. What minimum vertical distance upward should the top speaker be moved ...
*Thursday, May 3, 2012 at 1:28am by andrew *

**Physics**

Use F = q V B to solve for the charge, q, in Coulombs. F is the force (N) B the magnetic field (Tesla) and V is the velocity (m/s). If they mean how many ELECTRONS (positive or negative) the particle's charge corresponds to, divide q by the electron charge, e. That will give ...
*Wednesday, June 4, 2008 at 5:49pm by drwls*

**Physics**

Four point charges are positioned on the rim of a circle. The charge on each of the four is +0.5 µC, +1.5 µC, -1.0 µC, and -0.5 µC. If the electrical potential at the center of the circle due to the +0.5 µC charge alone is 4.5 104 V, what is the total electric potential at the...
*Friday, January 29, 2010 at 8:45am by Anonymous*

**physics**

A thick metal slab carries a current I A uniform magnetic field B points perpendicular to the slab (and into the page). If point P on the slab is at a higher potential than point Q , what can we say about the charge carriers that produce the current in the slab? Need some help...
*Wednesday, December 18, 2013 at 7:06am by james*

**physics 2 **

how much excess charge must be placed in a copper sphere so that its electric potential relative to infinity is 150kv radius 0.125 m b)what is the potential of the surface relative to infinity
*Wednesday, February 24, 2010 at 12:55pm by Anonymous*

**Math**

What are the multiples of 27? any number that can be divided by 27 9 , 3, 27 and 1
*Wednesday, January 24, 2007 at 6:14pm by Rachel*

**Math**

(370 * 290) - 27^2 = ? 27^2 = 27 squared.
*Monday, February 8, 2010 at 9:09pm by PsyDAG*

**math**

27=8k+k 27 = 9k 27/9 = k ? = k
*Tuesday, October 18, 2011 at 6:25pm by Ms. Sue*

**Math**

2 L + 2 w = 54 so w = 27 - L also w = L/2 so L/2 = 27 - L 3 L/2 = 27 L = 18
*Monday, March 10, 2014 at 10:07am by Damon*

**Physics**

A non-conducting ring of radius with a uniform charge density and a total charge is lying in the - plane, as shown in the figure below. Consider a point P, located at a distance from the center of the ring along its axis of symmetry. (a) What is the direction of the electric ...
*Sunday, February 24, 2013 at 10:28pm by P*

**Math - Exponential**

I get what you did up until... = [27*√7*√7*√7]/1331 Why is it √7 three times instead of √27??? I also don't get why 27 isn't √27...
*Saturday, January 24, 2009 at 2:04pm by Anonymous*

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