Wednesday
April 16, 2014

Search: What is the magnitude of the force a +12 µC charge exerts on a +2.9 mC charge 43 cm away?

Number of results: 70,189

physics
There are two +q charges and two -q charges on the corners of a square of size a. Left upper corner= +q charge, right upper corner= -q charge, left lower corner= -q charge, and right lower corner= +q charge. Compute the net force on each charge. I know that F= 9x10^9 Nm^2/C^2 ...
Wednesday, February 20, 2008 at 1:32am by Jessica

Physics
Three charges (q1 = 8.7 nC, q2 = -7.2 nC, and q3 = -4.8 nC) are at the corners of a square of side a = 9.2 cm, as shown in the picture. Determine the magnitude of the resultant electric force on each charge.
Sunday, July 8, 2012 at 12:02pm by Rain

physics
A golf ball of mass 4.50 10-2 kg is struck by a club. Contact lasts 2.35 10-4 s, and the ball leaves the tee with a horizontal velocity of 59.0 m/s. Compute the average force the club exerts on the ball by finding its average acceleration. what is the magnitude?
Thursday, February 3, 2011 at 11:36am by Anonymous

Physics
A warehouse worker exerts a constant horizontal force of magnitude 89.0 N on a 43.0 kg box that is initially at rest on the horizontal floor of the warehouse. When the box has moved a distance of 1.60 m, its speed is 1.10 m/s. What is the coefficient of kinetic friction ...
Sunday, October 23, 2011 at 9:06pm by Tom

Physics
A warehouse worker exerts a constant horizontal force of magnitude 89.0 N on a 43.0 kg box that is initially at rest on the horizontal floor of the warehouse. When the box has moved a distance of 1.60 m, its speed is 1.10 m/s. What is the coefficient of kinetic friction ...
Sunday, October 23, 2011 at 10:35pm by Tom

Physics
A 2.2 uC charge is located on the x-axis at x = -1.5 m. A 5.4 uC charge is located on the x-axis at x = 2.0m. A 3.5 uC charge is at the origin. Find the net force acting on the 3.5 C charge.
Sunday, March 16, 2014 at 6:15pm by Anonymous

college
how would you go about doing this type of problem thank you You are trying to raise a bicycle wheel of mass x and radius r up over a curb of height h . To do this, you apply a horizontal force . 1. What is the least magnitude of the force that will succeed in raising the wheel...
Monday, May 18, 2009 at 11:26pm by amy

physics (Newton's Laws)
One end of a spring is attached firmly to a wall, and a block is attached to the other end. When the spring is fully compressed, it exerts a force F on the block, and when the spring is fully extended, the force it exerts on the block is −F. What is the force of the ...
Wednesday, March 13, 2013 at 10:39pm by Kathy

Science
When an object exerts an action force on a more massive object, how does the reaction force compare to the action force?
Thursday, November 13, 2008 at 7:30pm by Julia

Physics Normal force
When an object exerts a normal force on a surface, the force is My answer is perpendicular to the surface. Am i correct?
Saturday, August 3, 2013 at 2:37am by xavier

Physics
Two small spheres spaced 20.0 centimeters apart have equal charge. How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.5710 −21 newtons?
Friday, January 24, 2014 at 4:57pm by James

Physics
Find the magnitude of the gravitational attraction force that the earth exerts on a 62-kilogram astronaut who is 8.00 X 10^7 meters away from the center of the earth. Useful numbers: M^earth=5.98 X 10^24kg; G=6.67 X 10^-11 N*m^2kg^-2 Please walk me through your steps, don't ...
Monday, June 11, 2012 at 2:53pm by Jen

physics 2
A spherical cloud of charge of radius R contains a total charge +Q with a nonuniform volume charge density that varies according to the equation. p(r) =P0(1-r/R) for r is less than or equal to R and p = 0 for r>R. Determine the magnitude E of the elcetric field. Express ...
Thursday, September 23, 2010 at 3:02pm by derival

Physics
A charge of 6.0 mC is to be split into two parts that are then separated by 3.00 mm. What is the maximum possible magnitude of the electrostatic force between those two parts?
Thursday, February 2, 2012 at 5:53pm by Aliyah

PHYSICS
A 900 kg car pushes a 1900 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4800 N. (a) What is the magnitude of the force of the car on the truck? (b) What is the magnitude of the ...
Tuesday, June 21, 2011 at 7:50pm by Kate

physics2
A charge of -6.5 micro-Coulombs is placed at the origin of a coordinate system. Another charge of -7.6 micro-Coulombs is placed at x = +0.29 m, y = +0.17 m. A third charge of +14 micro-Coulombs is placed at x = -0.29 m, y = 0 m. What is the magnitude of the total electric ...
Saturday, January 29, 2011 at 12:06pm by kelly

physics (coulombs law)
2m N/ 6 C = E in Newtons/coulomb (-2/6) (2m N) ==================================== for a) i assumed the charge is 0 'cos there's no charge placed before that.is it correct? NO! E is force experienced by test charge of one coulomb
Saturday, December 8, 2012 at 9:48pm by Damon

physics
A 3.0 kg block is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 30 with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25.(a) Calculate the magnitude of the frictional force on the block from the ...
Saturday, October 2, 2010 at 2:07pm by Alejandra

earth
The value of g at different latitudes are well known and measured. At sea level, the the effective (measured) value of g: g (at equator) = 9.78039 m sec^-2 g (North pole) = 9.83217 m sec^-2 (you will need to check that I have obtained the correct values - you should have been ...
Wednesday, September 7, 2011 at 8:24am by Dr Russ

physics
If the magnitude of the electric field in air exceeds roughly 3 106 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 49 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without a spark forming (...
Friday, February 10, 2012 at 9:08pm by james

physics
A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is 5.0 m/s^2 [E] and it takes 2.5s to stop. How...
Tuesday, March 27, 2012 at 11:18pm by Isabella

physics
A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is 5.0 m/s^2 [E] and it takes 2.5s to stop. How...
Tuesday, March 27, 2012 at 11:20pm by Isabella

help me please
Four 9.5 kg spheres are located at the corners of a square of side 0.70 m. Calculate the magnitude and direction of the gravitational force on one sphere due to the other three. What is the magnitude? ___ N Figure the vector of the opposite corner, and the adjacent corners ...
Monday, October 9, 2006 at 8:36pm by Teri D

Physics
Look up the charge on a proton!!!! (It is the same magnitude as the charge on an electron but positive, not negative, otherwise a hydrogen atom would not be neutral!!!) Try U = k Q1 Q2 / r where k = 9*10^9 N m^2/C^2
Friday, February 18, 2011 at 3:54pm by Damon

physics
A stone has a mass of 6.01 g and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.948. When the tire surface is rotating at 14.7 m/s, the stone flies out of the ...
Wednesday, February 23, 2011 at 7:07pm by heather

physics
A stone has a mass of 3.40 g and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.916. When the tire surface is rotating at 18.8 m/s, the stone flies out of the ...
Monday, April 30, 2012 at 2:26pm by Anonymous

physics
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 21.12 N. Find the magnitude of the net force exerted by the wire on the crooked tooth.
Wednesday, October 5, 2011 at 2:44pm by sarah

Physics
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 12.40 N. Find the magnitude of the net force exerted by the wire on the crooked tooth.
Sunday, October 13, 2013 at 2:48pm by Blue

physics
Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 95.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 21.0 kg. (c) Calculate the ...
Thursday, February 20, 2014 at 8:33pm by Steve

physics
I assume that the energy comes from asn E field between A and B. The force is proportional to charge and E so the force magnitude is equal (opposite sign though ) The distance is the same so the work done is the same. So the kinetic energy is the same (1/2) m v^2 so (1/2) ...
Wednesday, September 8, 2010 at 7:28pm by Damon

physics
A crate of mass m = 230 kg is pushed at constant speed up the frictionless ramp (θ = 29.0) by a horizontal force F. What is the magnitude of F? What is the magnitude of the force exerted by the ramp on the crate?
Wednesday, October 20, 2010 at 9:56pm by jim

physics
In the figure, forces A, B, C and D each have magnitude 50.0 N and act at the same point on the object. What torque (magnitude and direction) does A force exert on the object about point P? What torque (magnitude and direction) B does force exert on the object about point P? ...
Saturday, April 12, 2008 at 3:02pm by Erin

physics
oh ok sir thank you. The thickness of the probe in the direction of B is 2.00 mm. Find the density of the charge carriers, each of which has charge of magnitude e). thank you again sir
Tuesday, April 5, 2011 at 10:01pm by Rachel

physics
A point charge Q produces an electric field of magnitude 80.5 N/C at a distance of 1.08 m. If the field is directed toward the charge, what is the value of q
Thursday, September 1, 2011 at 7:44pm by Anonymous

Physics
A stone has a mass of 6.00 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.73. When the tire surface is rotating at a maximum speed of 17 m/s, the ...
Wednesday, November 7, 2012 at 6:53am by Don

Physics
A force of magnitude 7.50 {\rm N} pushes three boxes with masses m_1 = 1.30\,{\rm{kg}},m_2 = 3.20\,{\rm{kg}}, and m_3 = 4.90\,{\rm{kg}}, as shown in the figure(Figure 1) . (Ignore friction.) Find the magnitude of the contact force between boxes 1 and 2, and Find the magnitude ...
Saturday, February 16, 2013 at 5:54pm by Adnan

Physics
A person, sunbathing on a warm day, is lying horizontally on the deck of a boat. Her mass is 59.6 kg, and the coefficient of static friction between the deck and her is 0.696. Assume that she is moving horizontally, and that the static frictional force is the only force acting...
Wednesday, December 19, 2012 at 3:33pm by Sadie

physics
Two forces are the only forces acting on a 2.8 kg object which moves with an accelera- tion of 2.5 m/s2 in the positive y direction. One of the forces acts in the positive x direc- tion and has a magnitude of 12 N. What is the magnitude of the other force f2? Answer in units
Wednesday, October 17, 2012 at 9:36pm by josi

phys
A 12-kg crate rests on a horizontal surface and a boy pulls on it with a force that is 30 degree below the horizontal. If the coefficient of static friction is 0.40, the minimum magnitude force he needs to start the crate moving is:
Wednesday, March 12, 2014 at 8:28pm by tony

Physics
A stationary 3.0-m board of mass 6.0 kg is hinged at one end. A force is applied vertically at the other end, and the board makes a 30 angle with the horizontal. A 40-kg block rests on the board 80 cm from the hinge as shown in the figure below. a) Find the magnitude of the ...
Thursday, April 28, 2011 at 9:55am by Kayla

Physics Repost
Sphere A and B each have 1/3 the original charge. The electrostatic force separates them. Electrostaticforce/mg= tanTheta but sinTheta= d/2 / length where d is the sphere separation. Using the small angle approximation Force/mg= d/2*4 K(1/3 q)^2/d^2 = d/8 solve for d. q is ...
Monday, November 19, 2007 at 8:08pm by bobpursley

Physics
The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.971024 kg. The Earth's average radius is 6.38106 m. What is the magnitude of the gravitational force that the Earth exerts on the Hubble?
Wednesday, April 6, 2011 at 9:29pm by Denise

Physics
The Hubble Space Telescope orbits the Earth at an approximate altitude of 612 km. Its mass is 11,100 kg and the mass of the Earth is 5.971024 kg. The Earth's average radius is 6.38106 m. What is the magnitude of the gravitational force that the Earth exerts on the Hubble?
Wednesday, April 6, 2011 at 9:32pm by Denise

Physics
Two forces act concurrently on a point P. One force is 60nt due east. The second force is 80nt due north. (a) Find the magnitude and direction of their resultant. (b) What is the magnitude and direction of the equilibriant?
Monday, January 17, 2011 at 9:59pm by Elise

Physics
Two charges are D = 1.5 m apart and lie on the x-axis. What must be the magnitude of the charge on the right one, Q2, (in C) so that the electric field is zero at x = 1.05 meters. Let Q1 be at the origin and have a charge 6 C.
Monday, January 24, 2011 at 2:44pm by Nadya

physics
Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4
Sunday, July 17, 2011 at 12:46am by Chloe

physics
Find the magnitude and direction of the net electrostatic force exerted on the point charge q3 in the figure below, where q = +2.5 μC and d = 28 cm. The picture is of a square. q1=+q, q2=-2q, q3=-3q, q4=-4
Sunday, July 17, 2011 at 12:54am by Chloe

Physics
A mobile postive point charge is located between two parallel charged plates of charge densitys +o (top plate) and -o (bottom plate) at a distance d from the negative plate.the distance doubles (becomes 2d)between the negative (bottom) plate and the mobile charge... will the ...
Tuesday, February 23, 2010 at 8:13pm by Michael

PHYSICS
A mobile postive point charge is located between two parallel charged plates of charge densitys +o (top plate) and -o (bottom plate) at a distance d from the negative plate.the distance doubles (becomes 2d)between the negative (bottom) plate and the mobile charge... will the ...
Wednesday, February 24, 2010 at 1:32pm by Michael

science
Three point charges are placed on the x-axis. A charge of +2.0 μC is placed at the origin, -2.0 μC to the right at x = 50 cm, and +4.0 μC at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin? ...
Tuesday, March 18, 2014 at 1:46pm by shaindle

science
If the magnitude of the electric field in air exceeds roughly 3 X10^6 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 52 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without a spark forming (...
Saturday, February 11, 2012 at 12:39am by Brittney

physics
what is the magnitude of the electric field produced by a charge of magnitude 6.00 micro coulombs at a distance of a. 1.00m b. 2.00m
Monday, September 10, 2007 at 10:33pm by natash

physics
what is the magnitude of the electric field produced by a charge of magnitude 8.00 uC at a distance of 1.00 m?
Thursday, January 27, 2011 at 7:11pm by courtney

Science
A force of 650N is acting upwards and a force of 850N is acting downwards along the same line,state the magnitude and direction of the resultant force and the equilibrant force
Monday, February 10, 2014 at 9:23am by Precious

Physics
a)An object on a frictionless surface forms an angle of 27 with the horizontal. The object is pushed by a horizontal external force such that it moves with a constant speed. If the mass of the object is 72.3 kg, calculate the magnitude of the external force. b)What is the ...
Saturday, October 25, 2008 at 2:15pm by Anonymous

physics
A 125 kg crate rests on the flatbed of a truck that moves at a speed of 15.0 m/s around an unbanked curve whose radius is 66.0m. This crate does not slip relative to the truck. Obtain the magnitude of the static frictional force that the truck bed exerts on the crate. If you ...
Wednesday, November 3, 2010 at 6:41pm by Lynda

college physics
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.4N ; a second force has a magnitude of 5.0N and points in the negative y direction.
Sunday, September 29, 2013 at 10:24pm by taylor

physics
A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
Saturday, May 14, 2011 at 11:34pm by Sandhya

physics
A proton traveling at 10^4 m/s in the positive x-direction, enters a region where there is uniform electric field of magnitude 10 v/m and a uniform magnetic field of magnitude 10^-2 T. The electric and magnetic fields are parallel and are in the z-direction. In the following ...
Sunday, May 15, 2011 at 3:28am by Sandhya

physics
A car (m = 1670 kg) is parked on a road that rises 10.3 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
Thursday, September 29, 2011 at 3:06pm by Anonymous

physics
A car (m = 1540 kg) is parked on a road that rises 18.9 above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
Sunday, February 19, 2012 at 8:56pm by Shelby

physics
The froghopper (Philaenus spumarius), the champion leaper of the insect world, has a mass of 12.3mg and leaves the ground (in the most energetic jumps) at 4.00m/s from a vertical start. The jump itself lasts a mere 1.00ms before the insect is clear of the ground. (a) find the ...
Friday, October 4, 2013 at 1:13pm by jasmine

physics
a crane drops a .3 kg steel ball onto a steel plate. the ball's speeds just before impact and after are 4.5 m/s and 4.2 m/s respectively. If the ball is in contact with the plate for .03 s, what is the magnitude of the average force that the ball exerts on the plate during ...
Thursday, December 4, 2008 at 11:17pm by jason

Physics
A 1230 N beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1910 N crate hangs from the far end of the beam. What are the magnitude of the horizontal and vertical components of the force that the wall exerts on the left end of the ...
Friday, November 16, 2012 at 2:53pm by Sahrish

Physics
Determine the magnitude and direction of the total electric force on the +q charge by the +Q and -Q charges respectively. it should express and algebraic expression using Q,q,x,d and fundamental constants. -- I am trying to post a graph but it is not willing to so I will try ...
Sunday, August 28, 2011 at 9:52pm by AfterLife

physics
find the force for the charge with that velocity in that magnetic field, you have an equation for that. Then centripetal force equals that force above, solve for mass
Tuesday, March 26, 2013 at 4:16pm by bobpursley

physics
a. number=charge/e where e is the charge on one electron. b. Use coulombs force equation.
Monday, September 10, 2007 at 10:32pm by bobpursley

Physics (Normal Force)
I agree with your answer to the second part. You can consider the first part of the problem from different perspectives. From the macroscopic perspective where you look at the book and the table on the scale where you don't see the individual atoms, you can describe the book ...
Thursday, October 1, 2009 at 2:01am by Count Iblis

Physics, still don't get it!
Good morning. I know I have posted this question several times but I am still getting the wrong answer. So I decided to repost it to get a fresh start. Thanks for your help! A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside ...
Tuesday, April 10, 2007 at 1:35am by CJ

Math
A track of mass 1000 kg travelling on a straight level road accelerates from a speed of 10 m/s to a speed of 30 m/s in 12 seconds. Given that the engine of the track exerts a constant pull of magnitude P N and that there is a constant resistance to motion of 200 N, find the ...
Wednesday, April 17, 2013 at 9:32am by Samuel

trigonometry
Find the magnitude of the resultant force and the angle between the resultant and each force: Forces of 2 lbs and 12 lbs at an angle of 60 degrees to each other.
Tuesday, November 27, 2012 at 12:58pm by mikey

Physics
A construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. The beam is 2.77 m long and weighs 472 N. At a certain instant the worker holds the beam momentarily at rest with one end a distance d = 1.44 m above the floor, as shown in...
Wednesday, December 29, 2010 at 8:22pm by Sarah

Physics help
You are pushing three equal boxes, 8kg each, with a force of 250 on the first. What is the magnitude of the force of the first box on the second box? _________N What is the magnitude of the force of the third box on the second? _________N
Friday, October 26, 2012 at 2:29am by arcos15

Physics help
You are pushing three equal boxes, 8kg each, with a force of 250 on the first. What is the magnitude of the force of the first box on the second box? _________N What is the magnitude of the force of the third box on the second? _________N
Friday, October 26, 2012 at 2:38am by arcos15

Physics help
You are pushing three equal boxes, 8kg each, with a force of 250 on the first. What is the magnitude of the force of the first box on the second box? _________N What is the magnitude of the force of the third box on the second? _________N
Friday, October 26, 2012 at 2:44am by arcos15

Physics
On earth, two parts of a space probe weigh 18300 N and 4440 N. These parts are separated by a center-to-center distance of 5.11 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far...
Friday, October 19, 2012 at 5:00pm by Orla

Physics
On earth, two parts of a space probe weigh 17300 N and 3260 N. These parts are separated by a center-to-center distance of 19.4 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far...
Friday, September 20, 2013 at 2:42pm by Briana

physics
On earth, two parts of a space probe weigh 19200 N and 4130 N. These parts are separated by a center-to-center distance of 6.38 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far...
Monday, October 21, 2013 at 5:27pm by Anonymous

physics
A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.80 x10^5pa. Assuming that the top and bottom surfaces of the cap each have an area of .0004M^2, obtain the magnitude of the force that the screw thread exerts ...
Sunday, April 8, 2007 at 5:03am by CJ

Physics
Am I correct? Which statement explains why a bicycle is stable when a rider pedals quickly? (Points : 1) The angular momentum vector resists directional change. <------- Applying a torque does not change the angular velocity of the wheel. A rotating object acts like a ...
Monday, February 3, 2014 at 2:57pm by Me and I

physics,
A student presses a book between his hands The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 30.8 N. The coefficient of static friction between his hands and the book is 0.424. To keep the book ...
Monday, November 28, 2011 at 2:19pm by darren

Physics
A student presses a book between his hands. The forces that he exerts on the front and back covers of the book are perpendicular to the book and are horizontal. The book weighs 31N. The coefficient of static friction between his hands and the book is 0.40. To keep the book ...
Monday, June 11, 2012 at 7:35pm by Anonymous

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

chemistry
Matt forgot to put the fabric softener is the wash. As his socks tumbled in the dryer, they became charged.If a small piece of lint with a charge of +1.25 E -19 C is attracted to the socks by a force of 3.0 E -9 N, what is the magnitude of the electric field at this location?
Wednesday, May 1, 2013 at 12:09pm by michael

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 8:06pm by Anonymous

Physics
yes, I added the vectors, of the charges. for a uniform line, E= kλ/R. Since the charge on the line is negative, it goes towards the line, and only has an x component of E= -12 kN/C. For the point charge, which is negative, E is away from the source, I got E=30.2 kN/C for...
Sunday, October 9, 2011 at 5:30pm by Paul

Physics
A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +5.0 C point charge is fixed to one end of the rod, while a -5.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external ...
Saturday, January 26, 2013 at 3:03am by Amy

Physics
A long, thin rod (length = 4.0 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +5.0 C point charge is fixed to one end of the rod, while a -5.0 C point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external ...
Saturday, January 26, 2013 at 2:03pm by Amy

Physics
Charged particles such as ions can separate the charges inside of overall electrically neutral atoms, thus making an electric dipole. A dipole is characterized with a dipole moment p=αEexternal, where α is the polarizability of an atom, and Eexternal is the external ...
Monday, July 1, 2013 at 12:14pm by Mary

physics
In the figure here, a box of Cheerios (mass mC = 1.4 kg) and a box of Wheaties (mass mW = 3.3 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.1 N, and the ...
Wednesday, October 16, 2013 at 9:08pm by adek

scienc
I'm driving my car of mass 1000 kg at 100 km/hr when I accidentally hit the rear end of a truck of mass 5000 kg traveling in the same direction at 90 km/hr. My car and the truck lock together and move as a single object. Let F1 be the force the truck exerts on my car and let ...
Monday, March 18, 2013 at 12:33am by ayan

umt
2. A charge of -3.00 C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.1 m). The charges on the circle are -4.0 C at the position due north and +5.0 C at the position due east. What is the magnitude and ...
Wednesday, October 26, 2011 at 1:25pm by roy

phYsics
Consider three charged particles placed along the x-axis. The particle with q1 = 9.27 nC is at x = 7.66 m and q2 = 4.82 nC is at x = 2.64 m. Where must a positive charge, q3, be placed such that the resultant force on it is zero? I know F3= F13+ F23 (net force on charge q3 = ...
Wednesday, April 7, 2010 at 12:30am by echem

Physics
A 50-story building is being planned. It is to be 200.0 high with a base 48.0 by 66.0 . Its total mass will be about 2.5107 , and its weight therefore about 2.5108 . Suppose a 200 wind exerts a force of 860 over the 66.0 wide face . Part A Calculate the magnitude of the ...
Wednesday, June 29, 2011 at 11:37pm by Jenny

physics
A charge of -3.95C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass (radius = 0.135 m). The charges on the circle are -5.90C at the position due north and +4.27C at the position due east. What is (a) the magnitude and (b) ...
Sunday, May 20, 2012 at 6:43am by BM

physics
A duck has a mass of 2.70 kg. As the duck paddles, a force of 0.130 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.210 N in a direction of 52.0 south of east. When these forces begin to act, the velocity of the duck is 0.110 m...
Sunday, November 25, 2012 at 2:27pm by John

physics
A duck has a mass of 2.10 kg. As the duck paddles, a force of 0.110 N acts on it in a direction due east. In addition, the current of the water exerts a force of 0.240 N in a direction of 47.0 south of east. When these forces begin to act, the velocity of the duck is 0.120 m/...
Thursday, February 21, 2013 at 9:30pm by bebenel

physics
I think you may have left out a negative exponent of 10. Otherwise the charge is 20 C. That is a lot of charge. Call the charge Q, whatever it is. The force between the objects is F = k Q^2/d^2 = 10 Newtons where k is the Coulomb constant 8.99*10^9 N m^2/C^2 and d is the ...
Thursday, March 11, 2010 at 4:54am by drwls

Physics
An electric force of 3x10^-8N is produced from an electrostatic point charge of 4x10^-10. It is 40cm from another electrostatic point charge. What is the charge of the second point?
Thursday, April 11, 2013 at 11:15pm by Andrea

physics
5. A charge of -5.00 nC and a charge of -2.00 nC are separated by a distance of 40.0 cm. Find the equilibrium position (where the net force equals zero) for a third charge of 15.0 nC.
Wednesday, February 5, 2014 at 7:56pm by Anonymous

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