1. physics

    what is the magnitude and direction of the electric field 20.0 cm cm directly above an isolated 33.0 10 neg6 c charge?
  2. physics

    if a negative charge particle is placed on the left side and a higher positive charge particle is placed on the right side, why is the location that makes electric field zero is on the left of negative charge rather than in between or on the right of
  3. Physics 2

    A pair of charges exert attractive forces of magnitude 2.4*10^-2 N on each other when they are separated by 2.0 m. The total charge of the pair is +3.0 Micro Coulomb. What is the charge on the object with positive/negative charge?
  4. physics

    1. What did Newton conclude about the force that pulls apples to the ground and the force that holds the moon in orbit? 2. What does the very small value of the gravitational constant G (in standard units) tell us about the strength of gravitational
  5. science

    A positive charge of 3.50 µC is located in an electric field of intensity 3.00 N/C directed toward the south. Find the magnitude and the direction of the force on the test charge. (remember E = Fon q' / q', and 1 µC = 1.00 x 10-6 C) a. 8.6 x 105 toward
  6. Physics

    1.) a charge of -2x10^-9 C in an electric field between two metal plates 4cm apart is acted upon by a force of 10^-4 N. a.) what is the strength of the field? b.) what is the potential difference between the plates? my question: how will going to solve
  7. Physics

    Show that the escape speed n for a body located on the surface of a planet of radius r and mass M is given by the expression v = sqrt( (2* G * M)/r) now im using (K+Ug)i = (K+Ug)k where Kf = 0 because final velocity is zero and Ugf = 0 because its final
  8. physics

    Two large circular metal plates are parallel and nearly touching, only 4.1 mm apart. The two plates are connected to the opposite terminals of a 9 V battery. (a) What is the average electric field strength in the space between the plates? V/m (b) What is
  9. 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
  10. math/science

    The total surface area of Earth is about 1.97 × 10^8 square miles. The surface area of land on Earth is about 5.73 × 10^7 square miles. Find the ratio of surface area of land to that of the entire planet.
  11. physics

    A proton, initially traveling in the +x-direction with a speed of 6.00×105m/s , enters a uniform electric field directed vertically upward. After traveling in this field for 4.38×10−7s , the proton’s velocity is directed 45 ∘ above the
  12. : An alien planet uses the narl as a unit of lengt

    An alien planet uses the narl as a unit of length. If a square has a side length of 3.4 narls, what is the perimeter of the square?
  13. Physics

    A charged particle with mass m, charge |q|=6.4 ×10−19C and speed v=3 ×106 m/s enters from the bottom of the figure and traces out the trajectory shown in the fields shown. The only electric field E=5 ×103 V/m is in the region where the trajectory
  14. Physics

    A helicopter carrying Dr. Evil takes off with a constant upward acceleration of 5.0 m/s2. Secret agent Austin Powers jumps on just as the helicopter lifts off the ground. After the two men struggle for 10.0 s, Powers shuts off the engine and steps out of
  15. Physics - Electric Field

    Find the electric field at a point midway between 2 charges of +40.0e-9 C and +60.0E-9 C separated by a distance of 30.0 cm. My work: q1=40E-9 q2=60e-9
  16. 11th grade

    A thunderstorm has an electric field one night of 1.5 105 N/C. What is the magnitude of the electric force on an electron in such a field?
  17. Physics help please

    Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a
  18. physics

    Suppose electrons enter a uniform electric field midway between two plates at an angle ¦È0 to the horizontal, as shown in the figure
  19. College Physics II

    Consider a region in space where a uniform electric field E = 7450 N/C points in the negative x direction. What is the distance between the +13.1 V and the +14.1 V equipotentials?
  20. Physics

    A proton and an electron are moving due east in a constant electric field that also points due east. The electric field has a magnitude of 8.0 ¡Á 104 N/C. Determine the magnitude of the acceleration of the proton and the electron.
  21. Physics Electrical help thanks

    Thank you ! At some instant the velocity components of an electron moving between two charged parallel plates are vx = 1.3 105 m/s and vy = 3.6 103 m/s. Suppose that the electric field between the plates is given by E = (120 N/C) j. (a) What is the
  22. Science

    Two satellites are launched at a distance R from a planet of negligible radius. Both satellites are launched in the tangential direction. The first satellite launches correctly at a speed v0 and enters a circular orbit. The second satellite, however,
  23. physical

    A ball rolling across a field with an acceleration of -0.5 m/s rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed?
  24. physics

    The electric potential in a certain region is V = a x2 + b x + c, where a = 15 V/m2, b = −13 V/m, and c = 67 V. 1)Determine the electric field at x = 4 m. 2)Determine the position where the electric field is zero.
  25. Physics Help

    On a dare, you decide to try bungee jumping. You fall freely you are moving at 15 m/s downward. At that point the cord begins to stretch. The cord slows you to a stop as it stretches, then pulls you back upwards. When the cord is no longer pulling on you,
  26. Physics

    A satellite orbits a planet at 4000m/s, and the acceleration of gravity (centripetal acceleration) on the satellite is 0.58m/s2. What is the diameter of the orbit of the satellite? (Enter your answer in scientific notation utilizing "e" format and rounding
  27. 7th grade

    A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to
  28. electric field

    A uniform electric field of magnitude 1.0×10^2 NC^−1 exists between two conducting plates, one of which is positively charged and the other of which is negatively charged. The plates are 10 mm apart. (a) Calculate the magnitude of the potential
  29. physics

    a lift is moving downward with uniform acceleration to measure the acceleration a person in the lift drops a coin 6 ft above the floor of the lift . the coin strikes the floor in 1 second find the acceleration
  30. Physics

    A 500 kg cannon rests on wheels that are free to roll. The cannon fires a 2 kg cannon ball horizontally with an average force of 400 N. What is the acceleration of the cannon ball? What is the recoil acceleration of the cannon
  31. physics

    an electric field of 15000 N/C is directed along the positive x-axis, what is the electric force on an electron in this field?
  32. Physics Question

    Twins who are 19.0 years of age leave the earth and travel to a distant planet 12.0 light-years away. Assume that the planet and earth are at rest with respect to each other. The twins depart at the same time on different spaceships. One twin travels at a
  33. Physics II

    An electron with an initial speed of 5.0 ✕ 105 m/s enters a region in which there is an electric field directed along its direction of motion. If the electron travels 9.0 cm in the field before being stopped, what are the magnitude and direction of
  34. physics

    A moving particle encounters an external electric field that decreases its kinetic energy from 9530 eV to 7800 eV as the particle moves from position A to position B. The electric potential at A is -69.0 V, and that at B is +39.0 V. Determine the charge of
  35. physics

    A movig particle encounters an external electric field that decreases its kinetic energy from 9670 eV to 7540 eV as the particle moves from position A to position B. The electric potential at A is -66.0 V, and that at B is +16.0 V. Determine the charge of
  36. physics

    A soccer ball rolling across a field with an acceleration of -0.5m/s/s rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed?
  37. Physics

    Consider a charging capacitor made out of two identical circular conducting plates of radius 21 cm. The plates are separated by a distance 8 mm (note that d<<a). The bottom plate carries a positive charge Q(t)= Q0(1+t/T) with Q0 = 5e-06 C and T =
  38. physics

    The membrane that surrounds a certain type of living cell has a surface area of 4.9 x 10-9 m2 and a thickness of 1.2 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.5. (a) The potential on the
  39. Physics

    The membrane that surrounds a certain type of living cell has a surface area of 2.13 x 10-9 m2 and a thickness of 1.94 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 6.4. (a) If the potential on
  40. physics

    The membrane that surrounds a certain type of living cell has a surface area of 4.4 x 10-9 m2 and a thickness of 1.6 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 4.1. (a) The potential on the
  41. physics

    An electron in a computer monitor enters midway between two parallel oppositely charged plates. The initial speed of the electron is 6.15 x 10^7 m/s and its vertical deflection is 4.70 mm. (a) What is the magnitude of the electric field between the plates?
  42. Physics

    How would I approach this problem? What formula would I use to answer each part? Thank you in advance for any guidance... As part of the launch of the space shuttle, solid-rocket boosters (SRBs) first take it to an altitude of 45.0 km while they accelerate
  43. Magnetic Field Forces: Physics

    A uniform magnetic field points north; its magnitude is 3.5 T. A proton with kinetic energy 6.0 × 10-13 J is moving vertically downward in this field. What is the magnetic force acting on it? This is what I've done. The answer is incorrect. Please help me
  44. physics

    During a basketball game, a player flies above the basket and drops the ball in from a height of 10 meters. If the ball takes 4.4 seconds to fall, find the acceleration due to gravity.
  45. Physics

    A cube is located with one corner at the origin of an x, y, z, coordinate system. One of the cube's faces lies in the x, y plane, another in the y, z plane, and another in the x, z plane. In other words, the cube is in the first octant of the coordinate
  46. PHYSICS

    A beam of electrons is moving in a horizontal circle in a uniform magnetic field that is directed downward. The speed of the electrons is 1.0*10^7 m/s and the magnitude of themagnetic field is 1.0*10^-3 T. As seen from above, are the electrons moving
  47. Physics

    A uniform electric field of magnitude 370 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.70 cm. (a) What is the work done by the field on the electron? J? (b) What is the change in
  48. physics 2

    The electric field across a cellular membrane is 1.0x10^7 N/C directed into the cell. What is the magnitude of the electric forse on the sodium ion flowing into the cell? The charge on the sodium ion is +e.
  49. physics

    What magnitude point charge creates a 13000 N/C electric field at a distance of 0.220 m?
  50. physics

    Find the voltage increase when 12 J of work is done to push a 0.0013 C charge into an electric field.
  51. physics

    what is the magnitude and direction of the electric field 20.0 cm directly above an isolated 33.010 neg6 C charge?
  52. Physics

    Inside a metal conductor, why is it not possible to have a static charge configuration if there is a net electric field?
  53. Science

    (a) What magnitude point charge creates a 20000 N/C electric field at a distance of 0.210 m?
  54. Physics

    The electric field lines surrounding three charges are shown in the figure below. The center charge is q2 = -15.9 µC.
  55. physics

    What is the magnitude and direction of an electric field that exerts a 4.00 ✕ 10 -5 N upward force on a - 1.80 µC charge? N/C
  56. electromagnetism

    proof formula for charge line disk and ring in both electric field and potential
  57. Physics

    please check: 1. A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall. STRAIGHT DOWN 2. Which is the force of an acceleration? FORCE 3. A free-body diagram of a ball falling in
  58. physics (sorry about all of these!)

    A satellite moves in a stable circular orbit with speed Vo at a distance R from the center of a planet. For this satellite to move in a stable circular orbit a distance 2R from the center of the planet, the speed of the satellite must be?? I said that
  59. calculus

    Some scientists believe that the average surface temperature of the world has been rising steadily. They have modeled the temperature by the linear function T = 0.02t + 8.75, where T is temperature in °C and t represents years since 1900. (a) What do the
  60. physics

    3. What is the magnitude of the electric field strength E such that an electron, when placed in the field, would experience an electrical force equal to its weight? What electric field strength E is required if the electron is replaced by a proton
  61. physics

    What is the rms value of the electric field in a sinusoidal electromagnetic wave that has a maximum electric field of 64 V/m?
  62. Physics

    Two balls (Ball 1 and Ball 2) are released from the top of a tower. Ball 2 is thrown 3.14 seconds after Ball 1 is dropped. Ball 2 is thrown downward with a velocity of 3.49 m/s. Determine how far Ball 1 has fallen (to two decimal points) by the time Ball 2
  63. Physic ~ pls help

    A heavy conductor (mass m, length `, resistance R) is suspended by two springs each with spring constant k, and connected to a battery with electric potential V as shown in the figure. A magnetic field ~B is now imposed. The acceleration of gravity is 9.8
  64. physics

    Two point charges lie on the x axis. A charge of 6.2μC is at the origin, and a charge of -9.5μC is at x=10.0cm. What is the net electric field at (a) x=−4.0cm and at (b) x=+4.0cm?
  65. physics

    Consider point charges + Q and +9Q, which are separated by 12 meters. At what point, on a line between the two charges, would it be possible that the electric field would be zero. A. There is no such point possible B. 9 meters from the +Q charge C. 9
  66. phyics

    An electron and a proton are placed at rest in a uniform electric field modulus equal to 520N / C. Calculate the speed of each particle of 48 ns after the latter has been released
  67. phyics

    An electron and a proton are placed at rest in a uniform electric field modulus equal to 520N / C. Calculate the speed of each particle of 48 ns after the latter has been released
  68. physics

    A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.
  69. physics

    A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.
  70. physics

    A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.
  71. physics

    A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.
  72. physics

    A ball is released from a hot air balloon moving downward with a velocity of -10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = -9.8 meters/second2.
  73. chemistry

    The total surface area of earth is about 1.97*10^8 square miles. the surface area of land on earth is about 5.73*10^7 square miles. find the ratio of the surface area of land to the entire planet.?
  74. physics question

    As denizens of the surface of a spinning planet, we are always in uniform circular motion. Imagine you are in Nairobi (on the Earth's equator) at noon on a Monday. Answer the following questions only considering the rotation of the earth and NOT the
  75. Science

    A uniform metal ball (mass m) is tied to the end of a string (massless, length L). The other end of the string is fixed. The ball is moving in a vertical circle centered at the fixed end of the string. Suppose the velocity of the ball at the lowest point
  76. Electronic Field

    At some instant the velocity components of an electron moving between two charged parallel plates are vx = 1.3 105 m/s and vy = 3.6 103 m/s. Suppose that the electric field between the plates is given by E = (120 N/C) j. (a) What is the electron's
  77. physics

    A person can jump a horizontal distance of 2.59 m on the Earth. The acceleration of gravity is 11.8 m/s2 . How far could he jump on the Moon, where the free-fall acceleration is 0.297g? Answer in units of m
  78. physics

    A point charge of -8.4 µC is at the origin. a)What is the electric potential due to this charge at (x,y) = (3.5 m, 0 m) b) What is the electric potential due to this charge at (x,y) = (-3.5 m, 0 m) c) What is the electric potential to this charge at (x,y)
  79. Physics

    Which factors affect the electrical force between two objects? mass and distance between them charge and distance between them mass and electric field strength charge and mass
  80. physics

    There is a thin rod of length L. The top half of the rod has a charge +Q, and the bottom half of the rod has a charge -Q. Evaluate the electric field E at a distance r = 7.40 cm if L = 7.30 cm and Q = 3.50 nC
  81. physics

    An astronaut on the surface of Mars fires a cannon to launch an experiment package, which leaves the barrel moving horizontally. Assume that the free-fall acceleration on Mars is three eighths that on the Earth.(a) What must be the muzzle speed of the
  82. phys

    The ammonia molecule has a dipole moment of . Ammonia molecules in the gas phase are placed in a uniform electric field with magnitude 1.1×106 . What is the change in electric potential energy when the dipole moment of a molecule changes its orientation
  83. physics

    A typical baseball has mass of 150 grams. Suppose a batter hits a fastball pitched to him at 92 mph (which is about 40.89 m/s). After contact, the ball's speed is measured as 104 mph (which is about 46.22 m/s) directly back at the pitcher (who is able to
  84. Physics

    What is the acceleration of a proton in an electric field of 10^6 N/C?
  85. Physics

    What is the acceleration of a proton in an electric field of 10^6 N/C?
  86. AP PHSYICS DUE LATE HOMEWORK HELP!!!

    4. Assuming that ball 1 was thrown with an initial velocity of 5 m/s, how far will it land away from the building horizontally? A. 10 M b. 16 M C. 21 M D. 0.63 M 5. A projectile is launched a t 35 m/s at an angle of 33 degrees. Determine (a) the maximum
  87. physics

    4. Assuming that ball 1 was thrown with an initial velocity of 5 m/s, how far will it land away from the building horizontally? A. 10 M b. 16 M C. 21 M D. 0.63 M 5. A projectile is launched a t 35 m/s at an angle of 33 degrees. Determine (a) the maximum
  88. Physics

    Two point charges, 5.0 µC and -2.0 µC, are placed 5.0 cm apart on the x axis, such that the -2.0 µC charge is at x = 0 and the 5.0 µC charge is at x = 5.0 cm. At what point(s) along the x axis is the electric field zero? I'm not exactly sure how i
  89. Free Fall

    Thanks for the help with my previous problems. The acceleration to gravity on the moon is 1.6m/sec^2. If a rock is dropped into a crevasse, how fast it will be going just before it hits bottom 30 sec later? How far below the point of release is the bottom
  90. Physics

    The frequency of circular motion for a charged particle moving around in the presence of a uniform magnetic field does not depend on ... The radius of the circle The mass of the particle The charge of the particle The magnitude of the magnetic field
  91. PHYSICS

    A proton moves perpendicular to a uniform magnetic field B at 1.20 107 m/s and experiences an acceleration of 2.00 1013 m/s2 in the +x direction when its velocity is in the +z direction. Determine the magnitude and direction of the field.
  92. Earth Science

    What are two forces that cause the Earth's surface to constantly change and what are their effects on the planet? Please help I do homeschooling and I'm super behind in science please answer before 12:00 p.m. on 11-17-09
  93. Physics

    Weight of an object on the surface is 100N . What will we it's weight a planet whose mass 10times that of earth and radius is 3 times as that of earth??
  94. Physics

    Planet Mars has a mass of 6.4 × 1023 kg, and you have a mass of 5.0 × 101 kg. What force of gravity is exerted between you and Mars, if you are standing on its surface?
  95. Physics

    a uniform magnetic field of strength 0.5T is directed at an angle of 30degree to the plane of 100turns regular copper coil of lenght 0.04m and width 0.05mm. the diameter of the copper wire which makes up a coil is 1mm and the resistivity of copper is
  96. Phizzics....

    Both positive and negative charges produce electric fields. Which direction, toward or away from itself, does the field point for each charge?
  97. physics

    What are the magnitude and direction of the electric field at a point midway between a -7.0 µC and a +6.0 µC charge 2.5 cm apart? Assume no other charges are nearby.
  98. Physics Help

    Charge Q is uniformly distributed around the perimeter of a semicircle of radius R. What is the electric field at the circle's center?
  99. phy

    1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal
  100. physics

    1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal