1. Physics

    There is an electric field at a certain point P, where initially there is no charge. A point-like object is placed at point P, and a force on the object is observed. Next the object is removed and another point-like object is placed at the same point.
  2. Physics

    q1= 25 pC q2 = -75 pC A) calculate the magnitude of the electric force between the two charges B) Is the force attractive or repulsive? C) calculate the magnitude and direction of E1 *( there is an arrow above E1) , the electric field at the orgin due to
  3. physics parallel plate

    A proton traveling at a speed 1.0*106 m/s of enters the gap between the plates of a 2.0-cm-wide parallel-plate capacitor. The surface charge densities on the plates are 1*10^-6 C/m2. How far has the proton been deflected when it reaches the far edge of the
  4. physics

    Two students are on a balcony 18.3 m above the street. One student throws a ball (ball 1) vertically downward at 12.2 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the
  5. physics

    Two students are on a balcony 18.3 m above the street. One student throws a ball (ball 1) vertically downward at 12.2 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the
  6. Physics 1

    A textbook of mass 1.95 kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.100 m , to a hanging book with mass 3.08 kg . The system is released from rest, and the books are observed to move
  7. Astronomy

    Suppose that, in the future, observations with some new telescope reveal a planet about 16 AU from a star whose mass is the same as our sun's mass. How long does it take the planet to orbit the star? Use Keplers law. You know at 1AU the period is 365
  8. Physics (E&M)

    A uniformly charged straight wire (radius a) has linear charge density lambda. The wire is coated with a dielectric material chi with external radius b. I need to find the electric field everywhere and the volume and surface bound charge distrobutions but
  9. Physics

    A thin rod L = 9.0 cm long is uniformly charged and has a total charge of 4.4 nC. Find the magnitude of the electric field at a point P located at a distance R = 13.5 cm from the center of the rod when: (a) The point P lies along the axis of the rod
  10. algebra

    If a rocket traveled at 9*10^4 miles per hour . How long would it take to reach the moon from the planet.The moon is 6.3*10^5 miles from the planet it orbits.
  11. physics

    the electric force between Q1 and Q2 is 1.2 going to left. determine the distance between the two charges, and the electric field, E1 and E2, of the electric charges if Q1 is 6 x 10^-6 C, Q2 is 4 x 10^-6 and test charge of +1 x 10^-6 C
  12. physics

    Two point charges are placed on the x axis. (Figure 1) The first charge, q1 = 8.00nC , is placed a distance 16.0m from the origin along the positive x axis; the second charge, q2 = 6.00nC , is placed a distance 9.00m from the origin along the negative x
  13. Physics

    The electric field intensity at a point 2 meters from the surface of a uniformly charged conducting sphere is 1920 N/C. At a point 4 meters from its center, the electric field intensity is 3000 N/C. a.) Determine the radius of the sphere. Determine the
  14. physics

    If the total positive charge is Q = 1.62×10−6C , what is the magnitude of the electric field caused by this charge at point P, a distance d = 1.53m from the charge? (Figure 1) Enter your answer numerically in newtons per coulomb.
  15. physics

    The shape of a magnetic field about a current-carrying wire is much the same as the shape of an electric field ____________. A) All of these.B) None of these.C) about a point electric charge.D) between two opposite point charges.E) between the plates of a
  16. physics

    what is the electric flux through a sphere that has a radius of 2.2m and carries charge of 5.3 micro couloumb at its centre? solution
  17. Physics 2

    A particle with a mass of 3.65×10^−24 kg and a charge of 6.40×10^−19 C starts at rest and is accelerated for a distance of 0.102 m through a uniform electric field having strength E = 7.25×10^4 N/C. What is the resulting speed of the
  18. Physics

    Air molecules create an upward force that impacts the free fall of objects on the surface of the Earth, differing form the way an object would fall in vacuum. Question: What kind of objects should be used for experimentation if we want to limit the impact
  19. Physics

    A charge +q is at the origin. A charge -2q is at x = 6.30 m on the +x axis. (a) For what finite value of x is the electric field zero? (b)or what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V = 0 at r =
  20. 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 =
  21. Physics

    The ride drops riders from the top of a tall tower and let's them free fall for a short time before bringing them to a stop. For the riders' safety, you must make sure the riders do not experience an acceleration greate than 2g. Assume the riders have a
  22. Physics Electric POtential

    An electric charge q creates a field of 4500 N/C at a point d away from the charge. The potential at that point is +1800V. Determine q and d. Do you have to use the formula E=kQ/r^2 or something else? I'm lost on how to solve it
  23. english

    describe the surface of a planet using the 5 senses (year 7)....
  24. phy

    A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N . Part A What would be the magnitude of the gravitational force exerted
  25. physics

    On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hits the ball with a speed of 25 m/s at an angle of 28°
  26. physics

    Why in free fall condition the length of water column in capillary tube is equal to length of tube?h=2Tcos theta /drg where h is rise in? height ,T=SURFACE TENSION d=-DENSITY r=RADIUS OF TUBE AND g=ACCELERATION DUE TO GRAVITY explain from this formula how
  27. physics

    Two point charges +4q and +q are placed 30 cm apart. At what point on the line joining them is the electric field zero? (a) 15 cm from charge 4q (b) 20 cm from charge 4q (c) 7.5 cm from charge q (d) 5 cm from charge q
  28. physics

    Two point charges +4q and +q are placed 30 cm apart. At what point on the line joining them is the electric field zero? (a) 15 cm from charge 4q (b) 20 cm from charge 4q (c) 7.5 cm from charge q (d) 5 cm from charge q
  29. physics

    On your first trip to Planet X you happen to take along a 200g mass, a 40.0 cm long spring a meter tick and a stop watch. You're curious about the acceleration due to gravity on Planet X, where ordinarty tasks seem easier than on earth, but you cant find
  30. Physics

    A particle with a mass of 3.65×10−24 kg and a charge of 6.40×10−19 C starts at rest and is accelerated for a distance of 0.102 m through a uniform electric field having strength E = 7.25×104 N/C. What is the resulting speed of the particle?
  31. physics

    The surface shown is a square and has a side length of 14.0 cm. The electric field acting on this area has a magnitude of 180. N/C at an angle of 27.5°. Calculate the electric flux through the shown surface.
  32. physics

    what is the electric force exerted on a test charge of 3.86 x 10^-5 C if it is placed in an electric field of magnitude 1.75 x 10^4 N/C ?
  33. Physics

    On a clear day, the Earth’s atmospheric electric field near the ground has a magnitude of 100 N/C and points vertically down. Inside the ground, the electric field is zero, since the ground is a conductor. Consider a mathematical box of 1.0 m x 1.0 m x
  34. physics

    This is the situation I have been given: You are given three capacitors, one with a capacitance of 0.025 micro-farads, another with a capacitance of 0.05 micro farads, and the third with a capacitance of 0.015 micro-farads. Using only these capacitors,
  35. Physical Science

    Important support for General Relativity came from studies of the precession of the orbit of....what planet? It wasn't precession, it was rotation of the major axis direction of the elliptical orbit, also called "perihelion shift". The planet was Mercury.
  36. Physics

    A non-conducting ring of radius R with a uniform charge density λ and a total charge Q is lying in the yz - plane, as shown in the figure below. Consider a point P, located at a distance x from the center of the ring along its axis of symmetry. 1)
  37. college physics

    A 49-kg lead ball is dropped from the leaning tower of Pisa. The tower is 54 m high. (a) How far does the ball fall in the first 2.4 seconds of flight? (b) What is the speed of the ball after it has traveled 4.1 m downward? (c) What is the speed of the
  38. Physics

    Three charges q1, q2 and q3 lie along the x-axis. Charge q1=2.5 micro coulomb is at x= 1.5 m, while charge q2= 6.3 micro coulomb is at the origin. Where must the third charge q3 be placed on the axis so that the resultant force on it is zero?
  39. integrated science

    A planet is 2.45 x 10^9 km away. How long would it take in hours to travel to the planet at the speed of light? (speed of light is 2.998 x 10^8 m/s)
  40. Physics .. help!!

    Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thrust) of 3270 N, the craft descends at constant speed; if the engine provides only 2190 N, the craft accelerates downward at 40
  41. physics

    What is the electric field intensity produced by a charge at 10 meters, where the electric potential is 1.44 volts?
  42. physics

    A 2 μC charge is placed at × = 1 m while a second 2 μC Charge is placed at x=-1. Find (a) the electric field at y = 0.5 m, and (b) the electric force a -3 μC charge placed at y=0.5 m.
  43. Physics (help plz)

    A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
  44. Physics (help plz)

    A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
  45. Physics

    t a NASA research center free-fall research is performed by dropping experiment packages from the top of an evacuated shaft 156 m high. Free-fall imitates the so-called microgravity environment of a satellite in orbit. What constant acceleration would be
  46. science

    A 1.98 10-9 C charge has coordinates x = 0, y = −2.00; a 2.73 10-9 C charge has coordinates x = 3.00, y = 0; and a -4.95 10-9 C charge has coordinates x = 3.00, y = 4.00, where all distances are in cm. Determine magnitude and direction for the
  47. physics

    Your spaceship lands on an unknown planet. To determine the local value of g, you ask a steel-toed crew member to kick a stone, and you find that if she kicks it at 18.0m/s at various angles, the maximum range she can achieve is 30.8m. What is g on this
  48. Physics Please help

    A thin, horizontal 20cm×20cm copper plate is charged with 1.7×10^10 electrons. Consider the electrons are uniformly distributed on the surface. A. What is the strength of the electric field 0.1 mm above the center of the top surface of the plate? E=____
  49. Physics

    An alpha particle (helium nucleus, charge +2e) starts from rest and travels a distance of 1.88 cm under the influence of a uniform electric field of magnitude 12.2 kV/m. What is the final kinetic energy of the alpha particle?
  50. 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
  51. physics

    1. Three particles with charges of +11 mC each are placed at the vertices of an equilateral triangle with sides of 15.0 cm. What is the magnitude and direction of the net force on each particle? 2. A proton is released in an uniform electric field and it
  52. Science space

    I am doing a project on the planet uranus and I need a map showiong the path to my planet that i have chosen. The picture of the path must include asteroids, comets or other interesting objects. I am having so much trouble looking for such a picture. I
  53. physic

    A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N What would be the magnitude of the gravitational force exerted on the
  54. physic

    A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N . What would be the magnitude of the gravitational force exerted on the
  55. Physics - electrons/protons

    If you place a free electron and a free proton in the same electric field, how do the forces acting on them compare? How do their accelerations compare? Their directions of travel? My answer: Direction of travel: The proton and electron would move towards
  56. physics

    Two point charges, q1 and q2, are placed 0.30 m apart on the x-axis, as shown in the figure above. Charge q1 has a value of –3.0 x 10–9 C. The net electric field at point P is zero Q: Calculate the magnitude of charge q2. Q: Calculate the magnitude of
  57. Physics

    At a place directly below a thundercloud, the induced electric charge on the surface of the Earth is +1.0 X 〖10〗^(-7) coulomb per square meter of surface. How many singly charged positive ions per square meter does this represent? The number
  58. Electric field

    The acceleration of an electron in an electric field with a strength of 7.0 N/C is?
  59. physics

    A proton is projected in the positive x direction into a region of uniform electric field E = (-6.80 * 10^5 N/C at t = 0. The proton travels 6.80 cm as it comes to rest. (a) Determine the acceleration of the proton. thanks
  60. physics

    A proton is projected in the positive x direction into a region of uniform electric field E = (-6.80 * 10^5 N/C at t = 0. The proton travels 6.80 cm as it comes to rest. (a) Determine the acceleration of the proton. thanks
  61. college

    A newly discovered planet is found to have a circular orbit, with a radius equal to 11 times the radius of Earth's orbit. How long does this planet take to complete one orbit around the Sun?
  62. physics(please help)

    a planet orbits a star with period T. As seen from that planet the star's diameter subtends an angle of theta radians. Show the density of the star is given by rou=24pi/G(T^2)theta^3 please help!!!
  63. Physics

    the distance of a planet from its sun is 19000000 miles. if there are 29400000 seconds in one orbit, find the speed of the planet in its orbit about the sun. (assume a circular orbit)
  64. Physics

    An electric dipole (any pair of oppositely charge point particles) lies on the x-axis, consisting of a - 2.5nC charge at x = -10 cm, and a +2.5nC charge at x=10cm. Find the electric field (a) on the x-axis, at the point (20,0) and (b) on the y-axis, at
  65. PHYSICS!!!! help!!!

    A perfectly spherical, but squishable ball of radius 10 cm is blown up to an internal pressure of 2 atm. The ball is placed between two perfectly vertical walls and the walls are slowly squeezed together. Initially the ball slips down the walls, but when
  66. Chemistry

    A newly discovered giant planet has an aver- age radius 12 times that of the Earth and a mass 722 times that of the Earth. Calculate the ratio of the new planet’s den- sity to the Earth’s density.
  67. Astronomy

    1. At opposition, Nursat(is observed to be in opposition every 374 days.) is observed to subtend an angular radius of 7.1523 arcseconds. Use this and the conversion factors in our Table of Constants to find the radius of Nursat in km. 2. Nursat has a moon,
  68. Physics

    A loaded elevator with very worn cables has a total mass of 2600 Kg , and the cables can withstand a maximum tension of 2.90×104 N . A) Apply Newton's second law to the elevator and find the maximum upward acceleration for the elevator if the cables are
  69. astronomy

    You are a pulsar astronomer, and you have been measuring the pulses from a particular milli-second pulsar for several hundred days. You find that they do not arrive at regular intervals - sometimes they arrive a little early and sometimes a little late.
  70. Physics

    Millikan's oil drop experiment suspended a charged oil drop in an electric field. By measuring the size of the drop and using the oil's density, the weight of each drop could be calculated. This allowed the charge of each drop to be found, which was always
  71. Physics

    Thank you for answering my previous questions! I have another one now in regards to the following question... An unknown potential difference exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to
  72. Astronomy - Physics

    Now let us consider the length of time that the Sun is visible. Wait until the planet is at the summer solstice (12:00am). a) How many hours of daylight are there on the summer solstice with the inclination at 45 degrees? To estimate the length of day,
  73. Science

    Can someone help me/check with this work? 1. _______ is the rate of change of position. A.Speed***** B.Velocity C.Acceleration D.Deceleration 2. Which of the following is the difference between speed and velocity? A. direction***** B.units C.speed D.none
  74. physics

    A 23.6μC point charge lies at the origin. Find the electric field at the point (0.55m , 0). What is the magnitude of the electric field? Express your answers using two significant figures. Enter the x and y components of the field separated by a
  75. Physics

    I had a two part question in which I'm fairly sure I did the first part correct, but part b I am unsure about. For part a, I had to determine the magnitude of the net electric field at the origin, which I got E= 1.7 X 10^7 N/C. Part b)if a point charge of
  76. Physics

    A planet with mass 7 x 1024 kg orbits a sun with a period of 1 Earth's years. The speed of the planet around that sun is constant and |v|=43000 m/s. What is the mass of that sun?
  77. jay kay public

    Consider a planet in space whose mass is twice that of earth and radius is thrice that of earth what will be the weight of a body on this planet if its weight on the earth is 900N ??
  78. Physics

    1. At what height above the earth is the free-fall acceleration 30% of its value at the surface? 2. What is the speed of a satellite orbiting at that height?
  79. physics

    Calculate the mass of moon if free fall acceleration near it surface is know be 1.62 m/s^2 ( radius of moon is 1738 Km )
  80. Physics

    An electric dipole is formed from two charges, ±q, spaced 1.00cm apart. The dipole is at the origin, oriented along the y-axis. The electric field strength at the point (x,y)=(0cm,10cm) is 320N/C . What is the charge q? Give your answer in nC. What is the
  81. Physics..an electric field

    4 charged particles are at the cornedrs of a square of side a as shown. a) determine the magnitude and direction of the electric field at the location of charge q b) what is the total electric force exerted on q? basically picture is like this below It's a
  82. physics

    There's a problem my professor assigned, but I'm not sure which equation/process I should use to solve it. Please help. Two particles having charges of 0.420nC and 15.1nC are separated by a distance of 1.50m. At what point along the line (in m from the
  83. physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 9.8%. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  84. Physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 28.2 %. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  85. Physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 47.9%. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  86. physics

    As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the minimum gravitational force by 9.8%. Find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the
  87. physics

    Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 10^7 m.
  88. Physical Science

    the planet Jupiter is more than 300 as massive as earth. But a body would scarecly weighs 3 times as much on the surface of Jupiteras it would on the surface of the earth. Can you think of an explanation for why this is so?
  89. physics HELP MEEE SO CONFUSED

    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.
  90. physics

    Which of these are correct for an electric field? A) It's a vector quantity, and can be cancelled.B) Three of three are correct.C) It stores electric energy.D) Two of three are correct.E) It's the altered space surrounding electric charge.
  91. Physics

    A charge of uniform linear density 2.89 nC/m is distributed along a long, thin, nonconducting rod. The rod is coaxial with a long conducting cylindrical shell with an inner radius of 6.23 cm and an outer radius of 15.5 cm. If the net charge on the shell is
  92. Physics

    How do you calculate. How many years would it take the planet to orbit the sun. All I have is, that the planet is 97 times farther from sun than earth or 97 Astronomical units Use Kepler's Third Law. If you have never heard of it, read
  93. physics

    A uniform electric field ofmagnitude 384 V/m is directed in the positive x-direction. Suppose a 16 ìC charge moves from the origin to point A at the coordinates, (20 cm, 60 cm). What is the absolute value of the change in potential from the origin to
  94. physics

    please,i need help on this question:a thin circular ring of radius 20cm is charged with a uniform charge density(rho),if a small section of 1cm length is removed from the ring.calculate the electric field intensity at the center of the ring
  95. physics

    A loop of surface area s1=10cm^2 placed ina uniform magnetic field Bof magnitude B1=8×10^-2T, has its plane perpendicular to the field lines . A second loop of area s2=15cm^2 is placed in another uniform field B2 of magnitude B2=0.1T such that its normal
  96. physics

    what is the magnitude and the direction of an electric field when an electron is accelrated vertically upward at a distance of 5.5 metres in 3 micro seconds?
  97. physics

    Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 107 m.
  98. physics

    Consider a parallel-plate capacitor with charge density 7.5 10-7 C/m2 on the two plates and an electric field that points in the +z direction. What magnetic field is necessary to provide a velocity selector for 58 keV deuterons that move in the +y
  99. Physics

    A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
  100. Physics

    A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?