# A charge +Q and -2Q were placed on first and third of three very large parallel plates. The middle plate is earthed. Find the chargeon right extreem plate

17,079 questions, page 70
1. ## Physics

A 1.0 × 10−6 C test charge is 40.0cm from a 3.2 × 10−3 C charged sphere. How much work was required to move it there from a point 1.0 × 102 cm away from the sphere? what formula(s) should be used to calculate work...?

asked by Lauren on February 24, 2010
2. ## Physics

Consider a point charge with q= 1.5*10^-8 C. (a) what is the radius of an equpotential surface having a potential of 30 V?(b)Are surfaces whose potential differ by a constant amount (1,0 V) evenly spaced in radius?

asked by Jc on February 22, 2012
3. ## Chemistry

I'm having trouble giving the formula for this coordination compound: sodium diamminetetrachloroplatinate(IV) I think that it has to have a charge because it has Na+ and [Pt(NH3)2Cl4] (which is neutral), but Na[Pt(NH3)2Cl4]+ is wrong. Please help!

asked by nikki on March 26, 2011
4. ## physics

if 3e charge is at the origin and the magnesium nucleus is 3cm from the origin in the +x direction, at what position along the x- axis should an electron be placed so that the electron experiences no net force?

asked by james on November 9, 2013
5. ## Physics

I know this is so simple but for some reason I am having a brain fart... A 20 C charge experiences a 2 N force in an electric field. What is the strength of the electric field? Please help and laugh later thank you lol

asked by Trevor on May 1, 2015
6. ## physics

The current in a lightning bolt is 1.6 105 A. How many coulombs of charge pass through a cross-sectional area of the lightning bolt in 0.70 s? I don't know how to set this up???

asked by Brianna on May 16, 2012
7. ## Physics

How does the energy stored in a capacitor change if (a) the potential difference is doubled, and (b) the charge on each plate is doubled, as the capacitor remains connected to a battery?

asked by Anonymous on February 14, 2015
8. ## science

Consider a point charge with q = 1.510-8 C. (a) What is the radius of an equipotential surface having a potential of 30 V? (b) Are surfaces whose potential differ by a constant amount (1.0 V) evenly spaced in radius

asked by Swaran on February 22, 2017
9. ## Physics

The electric field between the plates of a paper-separated (K = 3.75) capacitor is 9.21 104 V/m. The plates are 2.05 mm apart and the charge on each plate is 0.775 µC. Determine the capacitance of this capacitor.

asked by Conor on February 9, 2012
10. ## Physics

How does the energy stored in a capacitor change if (a) the potential difference is doubled, and (b) the charge on each plate is doubled, as the capacitor remains connected to a battery?

asked by Anonymous on February 13, 2015
11. ## Fundamental of Electrical engineering

If the current flowing through an element is given by: I(t) =3t A, 0≤t

asked by Ekenu on February 14, 2019
12. ## Physics

Calculate the net charge on a substance consisting of a combination of 7.5 multiplied by 1013 protons and 3.5 multiplied by 1013 electrons. Answer in units of C

asked by Phil on February 17, 2013
13. ## Chemistry

1) Which group of elements is the least reactive? Explain why. 2) What properties distinguish metalloids from other elements? 3)Explain how to predict the charge usually observed for a monatomic ion.

asked by Anonymous on July 2, 2015
14. ## chemistry

Which surface is larger – the neutral atom or the anion? Use the concept of effective nuclear charge to explain your observations. I know anions are larger, but I can't exactly explain. Any help?

asked by Katherine on January 12, 2010
15. ## physics

Assume that you have two objects, one with a mass of 5 kg and the other with a mass of 20 kg, each with a charge of −0.012 C and separated by a distance of 9m. What is the electric force that these objects exert on one another? Answer in units of N

asked by Anonymous on April 22, 2013
16. ## Physics

Two identical capacitors are hooked in series to a 16.6 V emf. If the charge stored on any one of the capacitors is 0.88 micro-Coulombs after the capacitors are fully charged, what is the capacitance of either one of the capacitors?

asked by Xander on August 1, 2014
17. ## Physics

Four identical point charges of q = 4.64 nC are at the four corners of a square with a side length of 13.5 cm as shown in the figure. What charge Q should be placed at the center of the square to keep the other four charges in equilibrum?

asked by Julie on July 9, 2015
18. ## Physics

There is an electric field in a certain region that is defined as E=axihat, a is N/C and x is defined by the position in meters. What is the volume charge density in the region. So far I did 32p=(32)(8.85*10^-12) I got 3.54*10^-10, where did I go wrong?

asked by Sammy on August 20, 2009
19. ## physics

three electric charges, 3e, 3e and 12e, where "e" is proton charge, are placed at three of four vertices of a square of side 3cm. Calculate the electric field in the center of the square.

asked by manu on November 10, 2013
20. ## math

The charge for renting a rowboat on Loon Lake is D dollars per hour plus c cents for each minute into the next hour. How many dollars will Mr.Wilson pay if he used a boat from 3:40 P.M. to 6:20 P.M.

asked by john on July 27, 2014
21. ## statistic

in 2000 the average charge of tax preparation was \$95. assuming a normal distribution and a standard deviation of \$10. What proportion of tax preparation fees were more than \$95 ?

asked by tolendoy on December 26, 2014
22. ## physics

A car battery has a rating of 200 ampere·hours (A·h). This rating is one indication of the total charge that the battery can provide to a circuit before failing.

asked by rick on January 30, 2008
23. ## Statistics

In 2000,the average charge of tax preparation was \$95.Assuming a normal distibution and standard deviation of \$10.What proportion of tax preparation fees were more than \$95?

asked by Leslie Meagan on January 3, 2015
24. ## arithmetic

The magazine wants to make \$160 each page of advertising sold. What might the magazine charge for each size ad if ads can be any of the following sizes: 1/32, 1/16,1/8, 1/4, 1/2, or a whole page? Explain your reasoning.

asked by Kiyoshi Kasume(Help?) on January 10, 2011
25. ## Math Movers

Movers A mover charges \$500 for the first 100 miles plus \$10 for each additional mile. If C represents the charge and M represents miles. What would the equation look like for this question?

asked by John on March 29, 2013
26. ## Chemistry

When a solution of a certain gadolinium salt is electrolyzed with a current of 1.0 A for 2.0 h, 0.025 mol of Gd metal forms. Calculate the charge on the gadolinium ion in the salt.

asked by Durbin23 on May 7, 2017
27. ## physics

The potential energy of a +2 x 10-6 C charge decreases from 0.15 J to 0.05 J when it is moved from point A to point B. What is the change in electric potential between these two points? Do not enter any (-) sign in your answer.

asked by Amanda on April 28, 2014
28. ## physics

Three 3.0 microC charges are at the three corners of an square of side 0.50 m. The last corner is occupied by a -3.0 microC charge. Find the electric field at the center of the square

asked by ka on May 23, 2013
29. ## physics

Calculate the net charge on a substance consisting of a combination of 4.3 multiplied by 1013 protons and 2.5 multiplied by 1013 electrons.

asked by brooke on April 10, 2012
30. ## Physics

Two adjacent corners of a square have charges q1 = +1.5 x 10-9 C and q2 = +4.0 x 10-9 C. The length of a side of the square L = 0.25 m. Find the EPE of a charge q3= -6.0 x 10-9 C placed at the 2 remaining corners.

asked by K on July 10, 2008
31. ## Physics

A +2 uC and a +10 uC are 3cm apart a) Find the electrostatic force between the charges b) If the charges are brought together and touched, what would be the charge on each one? c) These spheres are then moved 3 cm apart. What would be the force between

asked by Betty on January 26, 2013
32. ## Physics

A small object of mass 3.50 g and charge -22 µC "floats" in a uniform electric field. What is the magnitude and direction of the electric field?

asked by Jan on February 6, 2010
33. ## physics

Thunderstorms can have an electric ﬁeld of up to 341 × 10 ^5 N/C. What is the magnitude of the electric force on an electron in such a ﬁeld? The fundamental charge is 1.6002 × 10^−19 C .

asked by Jenna on April 22, 2013
34. ## maths , science

Two point charges q and -2q are kept 'd' distance apart . Find the location of point relative to charge 'q' at which potential due to this system of charges is zero.

asked by neeraj on March 20, 2017
35. ## physics

A proton has a charge of e= 1.6 x 10^-19 C. (a.) Calculate the electric field produced by the proton 10 cm away. (b.) what is the magnitude of the electric potential at the same position (10cm)?

asked by Anonymous on February 16, 2014
36. ## physics

The repulsive electric force between the point charges -6.36 * 10^-6 C and q has a magnitude of 1.32 N when the separation between the charges is 1.07 m. Find the sign and the magnitude of the charge q.

asked by Alfredo on February 5, 2015
37. ## math

Monica paid sales tax of 1.50 when she bought a new bike helmet.If the rate was 5%,how much did the store charge for the helmet before tax.

asked by JONAH SANGILLO on October 29, 2015
38. ## Physics

An electrostastic force of 20.0 newtons is exerted on a charge of 8.00 x 10^/2 C at point P in an electric field. The magnitude of the electric field strength at P is Given: Fe = 20 B q = 8.00 x 10^/2 C

asked by Priscilla on February 5, 2010
39. ## Physics

Given the figure above, if a = 5.53 cm and b = 4.15 cm, what would be the force (both magnitude and direction) on the 5.0 nC charge? its a rectangle with + 10nC top left, -10nC top right and 5.0 nC bottom right.

asked by Impossible on January 20, 2017
40. ## physics

A hollow metal ball carrying an electric charge produces no electric field at a point: is it inside the ball?

41. ## Physics

A small object of mass 2.60 g and charge -17 µC "floats" in a uniform electric field. What is the magnitude and direction of the electric field?

asked by Phil on February 17, 2013
42. ## Physics Problems

Can you please help me with the following problem? Two charges separated by one meter exert 1-N forces on each other. If the charges are pushed to 1/4 meter separation, the force on each charge will be?

asked by Soly on November 5, 2007
43. ## Physics

A small object of mass 3.00 g and charge -13 µC "floats" in a uniform electric field. What is the magnitude and direction of the electric field?

asked by Nate on October 4, 2010
44. ## Math

What price do we charge a patient if the AWP for 300 tablets is \$14.55 and we want to give the patient 30 tablets plus a 6% markup and a \$3.00 dispensing fee?

asked by Anonymous on July 15, 2015
45. ## physics

Calculate the net charge on a substance consisting of a combination of 6.8 multiplied by 1013 protons and 4.6 multiplied by 1013 electrons.

asked by joe on January 11, 2010
46. ## ALGEBRA

IN A particular​ city, taxis charge an initial fee of ​\$3.20 plus ​\$1.70 per mile. How far can a passenger travel for ​\$40.60​? The passenger can travel nothingm miles.

asked by ELIZABETH on February 18, 2019
47. ## Chem

First off, thanks for the help on the other problems... For the reaction, A(g) + 2 B(g) 2 C(g), Kc = 1 x 10-10 at 25°C. Which of the following statements is true? 1. Delta n = +1 2. The concentration of the products is greater than the concentration of

asked by Marisol on February 9, 2007
48. ## Accounting

You have recently been employed by a large retail chain that sells sporting goods. One of your tasks is to help prepare financial statements for external distribution. The chain's largest creditor, National Savings & Loan, requires that financial

asked by Nirav on October 2, 2011
49. ## physics

lets say two capacitors C1 and C2 1uF each are connected in series with a voltage source 5v. One of the capacitors C2 has an initial voltage of 1v and the other has no charge on it initially.What is the final voltages across the capacitor C2?

asked by Venkatarama on September 10, 2012
50. ## Physics

The voltage across the cell membrance is 0.070 V the cell membrane is 0.10 µm thick what is the work done in joules to move one sodium ion (charge= 1.6 x 10 ^-19 C) from inside the cell to outside the cell?

asked by Nina on March 30, 2013
51. ## physics

a point charge q=5.0 micro coulombs is placed at each corner of an equilateral triangle with sides .26 m in length. a. what is the magnitude of the electric field at the midpoint of any of the three sides of the triangle?

asked by natash on September 10, 2007
52. ## physics

lets say two capacitors C1 and C2 1uF each are connected in series with a voltage source 5v. One of the capacitors C2 has an initial voltage of 1v and the other has no charge on it initially.What is the final voltages across the capacitor C2?

asked by Venkatarama on September 10, 2012
53. ## Physics

The voltage across the cell membrance is 0.070 V the cell membrane is 0.10 µm thick what is the work done in joules to move one sodium ion (charge= 1.6 x 10 ^-19 C) from inside the cell to outside the cell?

asked by Nina on March 30, 2013
54. ## Math

Alma subscribes to a website for processing pictures. The subscription is \$5.95 per month and 4-by-6 inch prints are\$0.19 each. How many prints does Alma purchase if the charge fir January is \$15.83?

asked by Anonymous on January 9, 2014
55. ## Physics

An electron is placed near a neutron. Which statement best describes the electrostatic force between them? a) there's no force between them since one is neutral b)there's a force of repulsion between them c)there's a force of attraction between them Isn't

asked by Andrea on April 5, 2008
56. ## Math

Mrs. Dana can buy a coat for \$187.00 cash or \$35.00 down or \$15.00 per month for 12 months. The charge for buying on the installment plan is: Also, can you explain what the installment plan is.

asked by Anonymous on August 5, 2015
57. ## physics

A solid nonconducting sphere of radius 13 cm has a positive charge 9.8 × 10-8 C spread uniformly throughout its volume. The electric field at a point within the sphere at a radius 5.0 cm has a magnitude of

58. ## electric force/field

Three point charges, A = 2.2 µC, B = 7.5 µC, and C = -3.9 µC, are located at the corners of an equilateral triangle . Find the magnitude and direction of the electric field at the position of the 2.2 µC charge. magnitude = . N/C direction =

asked by physics on January 23, 2012
59. ## Physics

A particle, travelling at 5.2x10^3 ms, with a charge of 1.6uC, is moving up the page. It is at right angles to a magnetic field of 6.4 T in the direction of right. What is the magnitude and direction of the force on the particle?

asked by Simmo on May 19, 2017
60. ## Chemistry

Give the formal change on the sulfur atom in a Lewis structure for the sulfate ion in which every atom satisfies the octet rule. 6 v.e - 4 v.e. = formal charge of +2?

asked by Anon on April 27, 2017
61. ## Math

frank saved 50% by purchasing his airline ticket in advance. His wife paid the full price. If their total charge was \$294, how much was Frank's ticket only?

asked by Reece on October 23, 2012
62. ## physics

if you charge a rubber rod with a piece of fur and bring the rubber rod close to the top of the gold-leaf electroscope, is it induction or polarization?

asked by todi on February 10, 2008
63. ## Math

Morgan subscribes to a website for processing her digital pictured. The subscription is \$5.95 per month and 4 by 6 inch prints are \$0.19 each. How many prints did Morgan purchase if the charge for January was \$15.83?

asked by Yoshi Egg on October 9, 2016
64. ## math

what is the cost in dollars to steam clean a room W yards wide and L yards long if the steam cleaners charge 10 cents per square foot?

asked by iris on November 17, 2011
65. ## 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

asked by Anonymous on April 19, 2010
66. ## 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!)

asked by Kelsi on May 13, 2012
67. ## Physics

Four identical 12µC charges are placed at the corners of a square of sides 44 cm, with one additional 12µC charge placed at the center. Find the electric potential at the midpoint of one of the sides.

asked by Ivan on November 12, 2010
68. ## physics

An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.75 µC at this spot? magnitude?

asked by michelle on January 8, 2011
69. ## Pre algebra

A fair charge an admission fee of \$6 for each person. Let C be the cost of admission (in dollars) for P people. Write an equation relating C to P. Then graph your equation using axes

asked by Kat on May 6, 2017
70. ## Math

Mrs. Monk rented a truck for 3 days. Enterprise charged her \$ 40 per day plus \$0.25 per miles. The total charge was \$142.75. How many miles did she drive the truck?

asked by Sunny on February 20, 2015
71. ## science

What creates the difference in charge that exists across a neuron's membrane? neurotransmitters sodium-potassium pump action potential resting potential I think its neurotransmitters

asked by anthony archer on April 18, 2019
72. ## Physics

Electrons are accelerated in the picture tube through a potential difference of 8000 V. What is the change in the potential energy of each electron traveling in this tube? charge of -e is 1.6E-19 C and its mass is 9E-31 kg.

asked by Mike on February 4, 2008

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 =

asked by sied on November 8, 2013
74. ## PHYSICS

You've got a conducting hollow sphere of rradius 0.2 m and a charge of 20 micro culumbs. What is the potential of the sphere at distance r from the center if: r=0.1 m? r=0.2 m? r=0.3 m? i need it step by step with explanations and solutions

asked by bel on February 15, 2012
75. ## 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!)

asked by Kelsi on May 13, 2012
76. ## Math

Beaufort Scale and Wind Effects 0 Smoke rises vertically 1 Smoke shows wind direction 2 Wind felt on face 3 Leaves move, flags extend 4 Paper, small branches move 5 Small trees sway, flags beat 6 Large branches sway, flags beat 7 Large branches sway,

asked by Smith on February 22, 2012
77. ## Physics

Two equally charged insulating balls each weigh 0.42 g and hang from a common point by identical threads 35 cm long. The balls repel each other so that the separation between their centers is 6.4 cm. What is the magnitude of the charge on each ball? I have

asked by Nicole on January 17, 2013
78. ## Physics

Two small pith balls, each of mass m = 16.6 g, are suspended from the ceiling of the physics lab by 1.8 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 19°, and the charges on the two balls are equal,

asked by Sami on June 6, 2012
79. ## College Physics

In Millikan's experiment, an oil drop of radius 1.75 ƒÊm and density 0.882 g/cm3 is suspended in chamber C (Fig. 22-14) when a downward electric field of 1.35 ~ 105 N/C is applied. Find the charge on the drop, in terms of e.

asked by Stephanie22-39 on July 8, 2012
80. ## ALGEBRA

Suppose you have a \$1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is \$50. How much will you save in interest charges in June by paying \$100 instead? Steps please.

asked by MONICA on November 26, 2011
81. ## ALGEBRA

Suppose you have a \$1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is \$50. How much will you save in interest charges in June by paying \$100 instead? Steps please.

asked by MONICA on November 26, 2011
82. ## Chem

What causes dispersion forces? Disperson forces are caused by an unsymettrical distribution of charge in the molecule, causing a net electric force. http://www.chem.purdue.edu/gchelp/liquids/disperse.html

asked by Dennis on January 9, 2007
83. ## ALGEBRA

Suppose you have a \$1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is \$50. How much will you save in interest charges in June by paying \$100 instead? Steps please.

asked by MONICA on November 26, 2011
84. ## Physics

Two small pith balls, each of mass m = 17.4 g, are suspended from the ceiling of the physics lab by 1.2 m long fine strings and are not moving. If the angle which each string makes with the vertical is = 17.9°, and the charges on the two balls are equal,

asked by Phil on September 5, 2014
85. ## Physics

Three charges are arranged as shown in the figure below. Find the magnitude and direction of the electrostatic force on the charge q = 5.12 nC at the origin. (Let r12 = 0.320 m.) I did the math and for mag i got 1.41E-5 N.for the direction i seem to keep

asked by Maria on February 1, 2018
86. ## ALGEBRA

Suppose you have a \$1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is \$50. How much will you save in interest charges in June by paying \$100 instead? Steps please.

asked by MONICA on November 26, 2011
87. ## geometry

A theatre +-decides to change the shape of its popcorn container from a regular box to a right regular pyramid, as shown in the following figure, and charge only half as much. If the containers are the same height and the tops are the same size, is this a

asked by crystal on January 10, 2011
88. ## 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

asked by michael on May 1, 2013

Molly Ellen, bookkeeper for Keystone Company, forgot to send in the payroll taxes due on April 15. She sent the payment November 8. The IRS sent her a penalty charge of 8% simple interest on the unpaid taxes of \$4,100.

asked by lynn on May 6, 2012
90. ## Physics

Two small pith balls, each of mass m = 10.1 g, are suspended from the ceiling of the physics lab by 0.8 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 42.1°, and the charges on the two balls are

91. ## physics

Two small pith balls, each of mass m = 16.6 g, are suspended from the ceiling of the physics lab by 1.8 m long fine strings and are not moving. If the angle which each string makes with the vertical is è = 19°, and the charges on the two balls are equal,

asked by Becky on June 6, 2012

A computer with software costs \$2,987, and Docie Johnson has agreed to pay 19% per year finance charge on the cash price. If she contracts to pay the loan in 18 months, how much will she pay each month?

asked by tmouery on April 8, 2013
93. ## science

if the voltage between the two plates of an electric air cleaner is 500 v, how fast would a 10 negative 12kg soot particle with -1* 10 negative 11 c of charge on it be moving if it went from negative plate to the positive? Explain your response

asked by i on June 22, 2011
94. ## physics

Electric current is a flow of electric charge that moves due to an electric pressure is called what?. A) wattage.B) voltage.C) All of these to some degree.D) None of these.E) amperage. I chose ampere, this is what my textbook tells me and I got it wrong

asked by Christy on April 14, 2012
95. ## ELECTRICITY AND MAGNETISM

a dust particle with mass =5.0*10-9 kg and charge q =2.0nC starts from rest at point a and moves in a straight line from a to the point b ! what is its speed V at point b? please some on SOLVE it and send me ON my emial after got solved pleaseee ?

asked by sufyan khalil on October 29, 2011
96. ## Chemistry

A tin atom has 50 electrons. Electrons in which sublevel of this atom would experience the lowest effective nuclear charge? a. 1s b. 3p c. 3d d. 4s 3. 5p

asked by C. on November 14, 2009
97. ## chem

Please help me with these two problems: 1)How many electrons would it take to equal the mass of a proton? 2)What mass of electrons would be required to just neutralize the charge of 1.0g of protons?

asked by sue on March 4, 2009
98. ## Nursing/billing/coding

if a physician is charging for a mole removal procedure based on what other physicians generally charge for this procedure, the physician is probably using what?

asked by Kati on April 6, 2017
99. ## physics

the elecric potential at a certain point is space is 12 V. What is the electric potential energy of a -3.0uc charge placed at that point? is it +36uj?

asked by josh on March 8, 2012
100. ## physics

A spherical conductor has a radius of 14.0 cm and charge of 26.0 µC. Calculate the electric field and the electric potential (a) r = 10.0 cm, (b) r = 20.0 cm, and (c) r = 14.0 cm from the center. how do i calculate k?

asked by confused on February 7, 2012