1. physics (electric charges)

    Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)

    asked by gaveen on May 12, 2010
  2. physics

    Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)

    asked by gaveen on May 12, 2010
  3. physics (electric charges)

    Hi, How can you charge an electroscope negatively? Is it by using a positively charged rod? Can someone please help me? Thank you :)

    asked by gaveen on May 12, 2010
  4. physics

    if a negatively charged rod is brought near a negatively charged electroscope, there will be no effect the leaves will fall the leaves will spread farther apart the electroscopw will become positively charge

    asked by kriti on March 28, 2011
  5. PHYSICS-

    Given a plastic rod and fur,explain how you would charge the electroscope positively and negatively.

    asked by DICKSON.C on April 27, 2016
  6. physics needed asap

    When you bring a positively charged rod next to the electroscope without touching it, the electroscope is neutrally charged, yet the leaves at the bottom of it repel each other. Why?

    asked by tyrell on April 13, 2012
  7. physics needed ASAP

    When you bring a positively charged rod next to the electroscope without touching it, the electroscope

    asked by tyrell on April 13, 2012
  8. Science

    To neutralize a pithball electroscope all you have to do is to hold it for a very short time. Explain what happens to discharge the pith ball if it is a)negatively charged b)positively charged

    asked by anum on April 28, 2008
  9. Physics

    7. Two metal spheres are suspended from insulating threads. A negatively charged rod is brought near these spheres. One sphere is pushed away from the rod and the other is attracted toward it. Describe the behavior of the spheres. SOLUTION: ----> {Metal

    asked by sally on May 29, 2009
  10. Physics

    A neutral ball is suspended by a string. A positively charged insulating rod is placed near the ball, which is observed to be attracted to the rod. Why is this? 1. The ball becomes negatively charged by induction. 2. The string is not a perfect conductor.

    asked by Lynn on July 23, 2013
  11. physical science

    6. If one body is positively charged and another body is negatively charged, free electrons tend to [A. move from the negatively charged body to the positively charged body.] B. remain in the positively charged body. C. remain in the negatively charged

    asked by jake on March 6, 2012
  12. Physics

    If you shine an ultraviolet light on the metal ball of a negatively charged electroscope, it will discharge. But if the electroscope is positivelely charged, it won't discharge. Why?

    asked by Jake on April 2, 2008
  13. HELP

    how can you tell the difference between a positively charged and a negatively charged object by using a electroscope Ashley: Please include the subject in your questions: Science, or Electricity would have been appropriate here. You can only determine the

    asked by ashley on November 29, 2006
  14. Physics

    The figure shows portions of two large, parallel, non-conducting sheets, each with a fixed uniform charge on one side. The magnitudes of the surface charge densities are σ(+) = 4 μC/m2 for the positively charged sheet and σ(-) = 10 μC/m2 for the

    asked by Lyra on February 17, 2014
  15. Electricity and Electronics

    If one body is positively charged and another body is negatively charged, free electrons tend to A. move from the negatively charged body to the postively charged body. B. move from the postively charged body to the negatively charged body. C. remain in

    asked by Mikaela on August 22, 2012
  16. please help

    You know that a cetrain electroscope is charged because the foil extends when there is nothing near to influence it. when a balloon rubbed with fur is brought near (but not near to change the net charge on the electroscope), the gold foil is seen to move

    asked by jen on January 15, 2009
  17. Science

    I can't find this answer in my book but can someone tell me if its right please? When you remove electrons from a metal cup, the cup becomes: negatively charged - positively charged or ionized? I think it is negatively charged. Thanks

    asked by Sue on October 9, 2012
  18. Natural science

    What will happen if a positively charged glass rod is brought near another positively charged glass rod that is suspended by a silk thread

    asked by Rethabile on July 23, 2018
  19. Natural science

    What will happen if a positively charged glass rod is brought near another positively charged glass rod that is suspended by a silk thread

    asked by Rethabile on July 22, 2018
  20. english..

    Can someone help me change up the words? A positively charged drum has the image drawn on it with a laser. The areas touched by light become negatively charged. Positively charged toner particles are attracted to the negative areas on the drum. The drum

    asked by thez on February 16, 2015
  21. Physics

    Which is an example of gaining a static charge by conduction? c) bringing a charged rod near an electroscope d) touching your car on a cold day and getting a shock I knew that a and b were not the answer, but I couldn't figure out if it was c or d, so I

    asked by Itssmeee on April 24, 2019
  22. Science

    In a classroom experiment, a student rubs a comb against her hair. The child is then brought near bits of paper resting on a surface. Which of these can be concluded if the comb picks up bits of paper? A. The comb is an insulator, but paper conducts

    asked by Landon on April 24, 2019
  23. Electronic

    If one body is positively charged and another body is negatively charged, will the free electrons tend to move from the negatively charged body to the positiovely charged body? yes

    asked by Ed on September 27, 2006
  24. Physics Please help2

    Two small insulating spheres with radius 7.00×10^−2m are separated by a large center-to-center distance of 0.565m . One sphere is negatively charged, with net charge -2.05μC , and the other sphere is positively charged, with net charge 4.10μC . The

    asked by Josh on May 21, 2014
  25. physics

    lighted matchstick brought near the negatively charged electroscope

    asked by somebody on June 10, 2017
  26. Physics

    ANY ANSWERS WILL HELP! THANKS! 1. Isolated points of electric charge are called ____. 4b. ____ was the American physicist who first measured this fundamental unit of charge. 5. This type of electrification occurs when the charging rod touches an

    asked by Al on December 17, 2013
  27. Physics

    There are two conducting concentric hollow spheres of outer radii and ( ). The thickness of the material of both spheres is . The inner sphere is negatively charged with charge density . The larger sphere is positively charged with charge density . (a)

    asked by P on February 24, 2013
  28. science

    Mei-Ling is given the task of studying the compound calcium bromide. Before she even begins her research, what information can Mei-Ling obtain from the compound's chemical name alone? Select all that apply. She can tell that the compound forms molecules.

    asked by macie on May 14, 2019
  29. science help

    One group of students is investigating the properties of charged objects. Their observations are listed below. When two positively charged objects are brought close to each other, they push each other away. When two negatively charged objects are brought

    asked by Oscar on December 1, 2015
  30. Physical Science

    What is the length of an aluminum rod at 65 degress celcius if its length at 15 degrees celcius is 1.2 meters? Finallength-initiallength=coefficentlinearexpansion*(65-15). You can get the coefficent of linear expansion for aluminum from your text or a

    asked by Mirayah Robinson on July 5, 2005
  31. Physics

    Explain using an example how to charge an object positively using only a negatively charged object.

    asked by Sam on April 13, 2009
  32. Physics - urgent help needed

    Explain using an example how to charge an object positively using only a negatively charged object.

    asked by Sam on April 13, 2009
  33. Physics

    Explain using an example how to charge an object positively using only a negatively charged object.

    asked by Sam on April 13, 2009
  34. physics

    If you rub a glass rod and silk together, the rod will then become positively charged, the metal ball will become negative,and the leaves will be positive, making it closer together ... or If you rub a glass rod and silk together, the rod will then become

    asked by anonymous on March 25, 2009
  35. physics

    How can you charge an object negatively with only the help of a positively charged object?

    asked by Nicole on July 14, 2010
  36. physics, help!!

    A metallic sphere initially has a net charge of +4.0 nC. A negatively-charged rod initially has a net charge of –6.0 nC. When the rod touches the sphere 8.2 x109 electrons are transferred to the sphere. What is the new net charge on the sphere?

    asked by Ella on November 9, 2012
  37. Physics

    1. Two objects suspended by insulating strings attract each other due to static electricity? a) are they neccessarily oppositely charged? b) After they are allowed to touch, they continue to attract and need to be pulled away from each other by the

    asked by anonymous on July 5, 2011
  38. physics

    A negatively charged rod is brought near a neutral sphere supported by an insulating stand. What type of charge would you expect to find on the side of the sphere nearest the rod and on the other side if the sphere is (a) a conductor and (b) an insulator?

    asked by yuzra on May 24, 2011
  39. Physical Science

    true or false in an atom, negatively charged electrons surround a positively charged nucleus

    asked by Dallas on May 9, 2011
  40. 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

    asked by Long on February 17, 2012
  41. science

    A 2.75-gram air inflated balloon is given an excess negative charge, q1 = -3.00 × 10-8 C, by rubbing it with a blanket. It is found that a charged rod can be held above the balloon at a distance of d = 5.80 cm to make the balloon float. In order for this

    asked by Kels on February 19, 2013
  42. Physics

    When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why? Please Help!!

    asked by Anonymous on March 25, 2014
  43. Physics

    When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why? Please Help!!

    asked by Anonymous on March 25, 2014
  44. physics

    A negatively charged balloon sticks to a wooden door. However, an uncharged balloon does not stick to a wooden door. What is the nature of the charge on the wooden door? A. Electrically neutral B. Positively charged C. Conductor D. Lacking protons I am

    asked by sophie on April 7, 2009
  45. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C toward the rod away from the rod

    asked by suhani on September 16, 2013
  46. college physics

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C toward the rod away from the rod

    asked by suhani on September 18, 2013
  47. 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
  48. Science

    Use the electron theory to explain how one object can be negatively charged and another can be positively charged. help If electrons are negative, removing them will leave a net positive charge (net meaning fewer negative electrons than postivite protons).

    asked by Nicka on November 29, 2006
  49. Physics

    Given a plastic rod and fur, how would you charge the electroscope

    asked by Mary on April 20, 2019
  50. physics

    please check this: When a glass rod is rubbed with silk and becomes positively charged, a. electrons are removed from the rod b. protons are removed from the silk c. protons are added to the silk d. the silk remains neutral A Charge is most easily

    asked by physics on March 14, 2009
  51. science

    In experiments involving a pithball electroscope, what causes the pithball to move? I believe the answer is B A. The pith material always holds a natural positive charge, and it is attracted to other charged objects. B. Electrons jump onto or off the

    asked by Jenny on February 28, 2009
  52. 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

    asked by Anonymous on February 20, 2010
  53. physics

    two charged plates are 2mm apart. An electron escapes from the negatively charged plate and reaches the positively charged plate in 1.2*10^-8 seconds. Find the electric field between the plates?

    asked by Nowah on July 24, 2012
  54. physics

    two charged plates are 2mm apart. An electron escapes from the negatively charged plate and reaches the positively charged plate in 1.2*10^-8 seconds. Find the electric field between the plates?

    asked by Nowah on July 24, 2012
  55. Chemistry

    Explain how a non metal atom becomes negative. Lose an electron, become negative. Bob Pursley isn't at his computer right now but I don't think he would mind if I explained that ADDING an electron to a non-metal makes it become negatively charged. I agree

    asked by Mani on April 18, 2007
  56. Physics

    How Would You Charge A Gold-leaf Electroscope With A Plastic Rod And Fur?

    asked by Chris on June 2, 2019
  57. chemistry

    if compound forms by ionic bonding, which is not true? A. a positively charged atom or group of atoms attracts a negatively charged atom or group of atoms B. the net cgare of the compound is zero C. the compund consists of just two atoms, each of opposite

    asked by Darius Graham on January 12, 2007
  58. electricity

    If one body is positively charged and another is negatively charged what will free electrons do? Generally it flows providing they are touching (or close enough to jump) and are conductors. Please read: http://www.kpsec.freeuk.com/electron.htm

    asked by catherine on June 7, 2007
  59. Science

    Describe what would happen if a positively charged sodium ion and a negatively charged chlorine ion came into contact?

    asked by Trent on May 27, 2015
  60. Organic chemistry

    You are at isoelectric point for a solution of Leucine. If the number of negatively charged carboxyl ate groups, -COO-, is 1x10^19, how many positively charged amino groups, NH3+, would there be?

    asked by Becky on October 5, 2011
  61. 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

    asked by Anonymous on February 20, 2010
  62. MS. SUE HELP- Chemistry

    Check answers? 1) Why did J.J. Thomson reason that electrons must be a part of the atoms of all elements? A) Cathode rays are negatively charged particles**** B) Cathode rays can be deflected by magnets C) An electron is 2000 times lighter than a hydrogen

    asked by Mary on October 7, 2016
  63. Chemistry

    Check answers? 1) Why did J.J. Thomson reason that electrons must be a part of the atoms of all elements? A) Cathode rays are negatively charged particles**** B) Cathode rays can be deflected by magnets C) An electron is 2000 times lighter than a hydrogen

    asked by Mary on October 7, 2016
  64. Physics-Check my answers

    when combing you hair you scuff electrons from your hair onto the comb.is your hair then positively or negativley charged?How about the comb? -Your hair is postively charged, while the comb is negatively charged Why are the tires for trucks carrying

    asked by Soly on November 6, 2007
  65. science

    1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?

    asked by katrina on January 9, 2017
  66. answer check science

    1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?

    asked by katrina on January 9, 2017
  67. science

    What does effect of negatively charged Object on positively charged object mean

    asked by brenda on May 16, 2011
  68. IPC

    i don't have a book or anything to go look all this stuff up so i really need help understanding this.. Which of the following statements is not true? a)negatively charged objects attract other negatively charged objects. b)postively charged objects

    asked by Please help!! on May 11, 2011
  69. physics

    two positively charged sphere have combined charged of 0.5microcolumb and repulsive force of 1.0newton and it's distance separation is2.0meter.what is the charge of each spheres?

    asked by Biruk on March 10, 2018
  70. physics

    two positively charged sphere have combined charged of 0.5microcolumb and repulsive force of 1.0newton and it's distance separation is2.0meter.what is the charge of each spheres?

    asked by yared on March 11, 2018
  71. Physics

    There are two conducting concentric hollow spheres of outer radii R2 and R1 (R2>R1). The thickness of the material of both spheres is d. The inner sphere is negatively charged with charge density −σ1. The larger sphere is positively charged with charge

    asked by Anonymous on February 21, 2013
  72. physics

    please check my answers and help me with the first one. how can you charge an object negatively with only the help of a positively charged object? -This one I am not too sure, when one material is rubbed against another electrons jump readily from one to

    asked by Soly on November 6, 2007
  73. Science

    Why does my hair stand on end when I take off my hat on a cold, dry day? Everything you see is made up of atoms. They contain even smaller particles, called protons and electrons. Protons have positive electrical charges and they never move. Electrons have

    asked by HERSHEYS on April 19, 2007
  74. Science Question for Lance

    Histones interact with DNA at specific loci because DNA has phosphate functional groups. This interaction occurs because histones have a net _____ positive charge, which derives from their ______ residues, and interact with DNA because of its net _______

    asked by sara on July 22, 2006
  75. Physics

    1)When two bodies are charged, the total charge before and after charging remains the same because of: A)quantization of charges B)conservation of charges C)law of induction D)coulomb's law I got C but im not sure. I couldn't find anything to state

    asked by Jon on April 9, 2008
  76. physics

    When two bodies are charged, the total charge before and after charging remains the same because of: A. quantization of charges B. conservation of charges C. law of induction D. Coulomb's law it is B? When a conducting sphere is charged positively,

    asked by sophie on April 7, 2009
  77. Science- Electric and Magnetic Potential Energy

    1. At which position will the bar magnets most likely experience the least magnetic potential energy between them? D - position 4 2. A positively charged test object is moving toward the positive source charge in an electric field. B - It's potential

    asked by ImLegit on April 19, 2016
  78. Physics

    A point charge of charge 1 mC and mass 100 g is attached to a non-conducting massless rod of length 10 cm. The other end of the rod is attached to a two-dimensional sheet with uniform charge density σ and the rod is free to rotate. The sheet is parallel

    asked by Nilesh P. on May 14, 2013
  79. Pyhsic...Elena,please help....

    A point charge of charge 1 mC and mass 100 g is attached to a non-conducting massless rod of length 10 cm. The other end of the rod is attached to a two-dimensional sheet with uniform charge density σ and the rod is free to rotate. The sheet is parallel

    asked by pyhsicamateur on May 15, 2013
  80. Physics

    A point charge of charge 1 mC and mass 100 g is attached to a non-conducting massless rod of length 10 cm. The other end of the rod is attached to a two-dimensional sheet with uniform charge density σ and the rod is free to rotate. The sheet is parallel

    asked by hans on May 15, 2013
  81. 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

    asked by Hayden on December 21, 2012
  82. physic 108

    A charged nonconducting rod, with a length of 3.83 m and a cross-sectional area of 5.69 cm2, lies along the positive side of an x axis with one end at the origin. The volume charge density ρ is charge per unit volume in coulombs per cubic meter. How many

    asked by k on January 21, 2013
  83. physics

    True or false questions a)Rubbing a polythene rod with a duster gives the rod extra negative charge. b)Rubbing a polythene rod with a duster takes away positive charge from the duster. c)The duster will have the same charge as the polythene rod it has

    asked by Victor on February 8, 2009
  84. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by physics on September 28, 2013
  85. physics

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by momen on February 23, 2017
  86. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by suhani on September 24, 2013
  87. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by vishal on September 13, 2013
  88. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by suhani on September 27, 2013
  89. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by suhani on September 23, 2013
  90. physics

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by suhani on September 22, 2013
  91. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by physics on September 28, 2013
  92. PHYSICS

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by physics on September 29, 2013
  93. college physics

    A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C

    asked by vishal on September 21, 2013
  94. physical science

    The oxygen atoms of a water molecule are most attracted to 1: Other oxygen atoms, negatively charged ions, positively charged ions or nonpolar molecules?

    asked by palmer on November 6, 2007
  95. Physics Please Help

    A point charge of charge 1 mC and mass 100 g is attached to a non-conducting massless rod of length 10 cm. The other end of the rod is attached to a two-dimensional sheet with uniform charge density σ and the rod is free to rotate. The sheet is parallel

    asked by Mathslover on May 18, 2013
  96. Physics

    Recall that for a finite rod of length L and total charge Q, the electric field for a point located a perpendicular distance r from the middle of the rod has a magnitude given by: Consider the limit of large distances, where a finite charged rod is

    asked by Julia on February 11, 2010
  97. pre ap physics

    ** When s conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere's conducting nature, the charge spreads uniformly throughout the surface of the sphere. Charge is uniformly distributed

    asked by Angela here again on February 27, 2011
  98. Physics

    Two parallel plates are 4.85 cm apart. The bottom plate is charged positively and the top plate is charged negatively, producing a uniform electric field of 5.51 x 104 N/C in the region between the plates. What is the time required for an electron, which

    asked by Ashley on January 31, 2012
  99. Physics

    We have an infinite, non-conducting sheet of negligible thickness carrying a uniform surface charge density +σ=7.00e-6 C/m2 and, next to it, an infinite parallel slab of thickness D=17 cm with uniform volume charge density ρ=−4.94e-5 C/m3 (see sketch).

    asked by Annoyingmous on June 15, 2013
  100. + --> a sphere --> (+)

    Multiple Choice Help: ** When s conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere's conducting nature, the charge spreads uniformly throughout the surface of the sphere. Charge is

    asked by Angela on February 25, 2011