1. physics

    The planet Jupiter is more than 300 times as massive as the Earth But it so happens that a body would scarcely weigh three times as much on the surface of Jupiter as it would on the surface of Earth. Can you think of an explanation for why this is so?
  2. physics

    The planet Jupiter is more than 300 times as massive as the Earth But it so happens that a body would scarcely weigh three times as much on the surface of Jupiter as it would on the surface of Earth. Can you think of an explanation for why this is so?
  3. physics

    A neutral conductor completely encloses a hole inside of it. You observe the outer surface of this conductor carries a charge of -12 uC. (a) Can you conclude that there is a charge inside the hole? If so, what is the charge? (b) How much charge is on the
  4. + --> 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
  5. physics

    A red ball is thrown down with an initial speed of 1.0 m/s from a height of 27.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.5 m/s, from a height of 0.7 meters above the
  6. Physics (2)

    Consider a charged ring of radius 43.4 cm and total charge 18 nC. We are interested in the electric field a perpendicular distance z away from the center of the ring. At what distance from the center of the ring does the electric field become maximum ..so
  7. physics

    A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 57.0 m below the initial position of the falcon, how long does the falcon take to reach the pigeon? Assume that the pigeon remains at
  8. Physics

    A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 66.0 m below the initial position of the falcon, how long does the falcon take to reach the pigeon? Assume that the pigeon remains at
  9. physics

    A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 53.0 m below the initial position of the falcon, how long does the falcon take to reach the pigeon? Assume that the pigeon remains at
  10. Physics please help!!

    A peregrine falcon dives at a pigeon. The falcon starts downward from rest and falls with free-fall acceleration. If the pigeon is 82.8 m below the initial position of the falcon, how long does it take the falcon to reach the pigeon? Assume that the pigeon
  11. Physics

    A peregrine falcon dives at a pigeon. The falcon starts downward from rest and falls with free-fall acceleration. If the pigeon is 82.8 m below the initial position of the falcon, how long does it take the falcon to reach the pigeon? Assume that the pigeon
  12. phsics

    a man weighs 1370N on earth what would he weigh on jupiter where free fall acceleration is 25.9 m/s2 the acceleration of gravity is 9.8 m/s2 in units of N
  13. science

    How does knowing the age of a lunar rock help astronomers estimate the age of the surface of a planet with no atmosphere?
  14. physics

    Three point charges are located away from a dot. charge 1 is 3 cm north of the dot and is 2.1 nC. Charge 2 is 5 cm east of the dot and is -5nC. Charge 3 is -10nC and is located 45 degrees northeast and 5.831 cm away from the dot. What is the net electric
  15. Physics

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 36.0 km/s and 50.6 km/s. The slower planet's orbital period is 7.78 years. (a) What is the mass of the
  16. physics 1

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.6 km/s and 63.5 km/s. The slower planet's orbital period is 8.36 years. (a) What is the mass of the
  17. mechanics

    Two planets, X and Y , travel counterclockwise in circular orbits about a star, as shown in figure below. The radii of their orbits are in the ratio 3 : 1. At some time, they are aligned as in the figure, making a straight line with the star. During the
  18. Physics

    If our planet is travelling at 10000 mph (just using hypothetical numbers) and you launched a rocket into space at 10000 mph (ignoring the planets rotational speed to keep this simple) on the same exact path the planet is moving, would the rocket be moving
  19. science

    A kid kicks a soccer ball of mass 430g so that the ball moves on a flat rough ground at a velocity of 16m/s towards a stairway. The ball experiences a constant frictional force of 5N over a distance of 200cm. it then hits the stairway and collides
  20. College Physics

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.5 km/s and 54.0 km/s. The slower planet's orbital period is 6.53 years. (a) What is the mass of the
  21. college physics 1

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 35.1 km/s and 63.3 km/s. The slower planet's orbital period is 6.74 years. (a) What is the mass of the
  22. physcs

    Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.8 km/s and 64.6 km/s. The slower planet's orbital period is 8.84 years. (a) What is the mass of the
  23. English

    Identify the sentence that is punctuated correctly. A. Although, the impact on our planet is clear global warming was not a high priority for many years. B. Although the impact on our planet is clear, global warming was not a high priority for many years.
  24. English

    Identify the sentence that is punctuated correctly. A. Although, the impact on our planet is clear global warming was not a high priority for many years. B. Although the impact on our planet is clear, global warming was not a high priority for many years.
  25. Magnetic effect

    A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region
  26. physics

    help me please. *TRUE or FALSE* 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the direction of a magnetic field
  27. PHYSICS

    please.!PLEASe PLEASE. help me. TRUE or FALSE 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the direction of a
  28. Planet Juniper

    Need any and all Information about Planet Juniper...thanks
  29. physics

    A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to
  30. Physics

    A basketball is thrown at 8.00m/s [up] from a height of 2.00m and eventually comes back down to hit the floor. a)assuming a uniform acceleration of 9.80m/s^2 [down], how long was the ball in flight? b) calculate the balls velocity immediately prior to
  31. Science

    If one ignores air friction, the actual acceleration is a constant, 9.8m/s^2. Now if you are experimenting, and actually trying to measure it, you need a method of plotting distance fell versus time. I have done it with photography in the dark, with a
  32. Physics

    A. Calculate the force on an alpha particle in an electric field E=Exm where E=3.6E4 N/C and x is a unit vector in the x direction. What is the direction of the force? B. Calculate the acceleration of the alpha particle in this electric field. What is the
  33. earth

    planet is in circular orbit around the Sun. Its distance from the Sun is 2.9 times the average distance of Earth from the Sun. What is the period of this planet, in Earth years?
  34. Physics

    The escape velocity on Planet X is the speed the rocket needs in order to never fall back down again in a universe in which X is the only object. In order for the rocket to not fall back down, its velocity to never become negative, how far away does the
  35. Basic Physics

    An unknown charge sits on a conducting spherical shell of radius 10 cm. If the electric field 15 cm from the center of the sphere has the magnitude 3.0E3 N/C and is directed radially inward, what is the net charge on the sphere?
  36. Physics

    anybody help me to my homework please.!thanks TRUE or FALSE 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the
  37. Physics

    help me to my homework please.!PLEASe PLEASE. TRUE or FALSE 1.the north pole of a permanent magnet is attracted to a south pole 2.iron,aluminum, and nickel are all ferromagnetic materials 3.all permanent magnets are surrounded by a magnetic field 4.the
  38. physics

    explain the relationship between contours of constant potential and the electric field direction. why is the electric field a vector quantity while the electric potential is a scalar?
  39. Physics URGENT

    5uC charges are at the base vertices of an equilateral triangle 0.4m on a side. What is the electric field at the third vertice? im not completely sure how to start that.. don't i need the force to calculate the x&y components? NO. Figure E directly from a
  40. Physics

    An electron with a velocity of v = (3 x + 4 y + 2 z) × 106m/s enters a region where there is both a magnetic field and an electric field. The magnetic field is B = (1 x - 2 y + 4 z)T. If the electron experiences no force as it moves, calculate the
  41. Physics

    An electron with a velocity of v = (3 x + 4 y + 2 z) × 106m/s enters a region where there is both a magnetic field and an electric field. The magnetic field is B = (1 x - 2 y + 4 z)T. If the electron experiences no force as it moves, calculate the
  42. Physics

    A very large, thin, flat plate of aluminum of area A has a total charge Q uniformly distributed over its surfaces. Assuming the same charge is spread uniformly over the upper surface of an otherwise identical glass plate, compare the electric fields just
  43. Physics

    An airplane is flying in a horizontal circle at a speed of 104 m/s. The 73.0 kg pilot does not want the centripetal acceleration to exceed 6.98 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is
  44. Physics

    An airplane is flying in a horizontal circle at a speed of 106 m/s. The 81.0 kg pilot does not want the centripetal acceleration to exceed 6.16 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is
  45. Physics

    A man weighs 1220 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N.
  46. Phsics

    A man weighs 772 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N
  47. physics

    In a region containing a uniform electric field at right angle to the magnetic field suppose, for instance, that Vector B point in X direction and Vector E in the Z axis as shown below. What path will a particle that is released from the origin it follow.
  48. physics

    A proton travels in the x direction and enters a region where a constant uniform electric field is directed in the y direction. Derive an equation which describes the x and y cooedinates of the proton in the field as a function of time t.
  49. physics

    A proton travels in the x direction and enters a region where a constant uniform electric field is directed in the y direction. Derive an equation which describes the x and y cooedinates of the proton in the field as a function of time t.
  50. physics

    An electric force moves a charge of +1.85 10-4 C from point A to point B and performs 6.70 10-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two points?
  51. Physics

    Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s. Att the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way
  52. science

    plz any one i am abit confused can you answer these questions thx 05. The space surrounding a charge within which the influence of its charge extends is known as. (a) Electric field (b) Magnetic field (c) Line of force (d) Electric intensity 06. A region
  53. Physics

    plz any one i am abit confused can you answer these questions thx 05. The space surrounding a charge within which the influence of its charge extends is known as. (a) Electric field (b) Magnetic field (c) Line of force (d) Electric intensity 06. A region
  54. physics

    a point charge q2 equals negative 2.1 micro C is fixed at the origin of a coordinate system. another point charge q1 equals 4.1 micro C is initially located at point p a distance d1 equals 6.1 centimeters from the origin along the x axis
  55. physics

    Two identical charges, q1 = q2 = 6.0 C, are separated by 1.0 m. a. Calculate the electric field and electric potential difference at point P, midway between them. b. Replace one of the charges with a charge of the same magnitude but opposite sign
  56. Physics 2

    2 spheres of equal diameters have a positive 15 micro column and negative 10 micro column charge if they are place 5 cm apart what would be the force of attraction between them.
  57. Physics

    A charge of -17 nC is on the X axis at the origin. A charge of -24 nC is on the X axis at 11 cm. Find the electric field (magnitude and direction) at 19 cm on the X axis. I believe to solve this problem, the equation E = kC (q1/r1^2) must be used for each
  58. Physics Gravitation Question

    Vesta, a minor planet in the Asteriod Belt between Mars and Jupiter, has a mean radius of 525 km and mass of 2.59 X 10^20 kg. The Dawn Spacecraft (m = 1240 kg) orbited Vesta in 2011 & 2012. A. Find the local acceleration due to gravity at the mean surface
  59. Physics

    What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
  60. physics

    A charge of -4.00 nC is located at (0,1.00)m. what is the x-component of the electric field at(4.00,-2.00)m?
  61. Physics

    What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
  62. Physics

    What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
  63. Physics

    What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?
  64. physics

    An electric dipole is made of two charges of equal magnitudes and opposite signs. The positive charge, q = 1.0μC, is located at the point (x, y, z) = (0.00cm, 1.0cm, 0.00cm), while the negative charge is located at the point (x, y, z) =
  65. trig/physics

    Three positive particles of equal charge +11.o micro C, are located at the corners of an equilateral triangle of sides 15.0cm. Calculate magnitude and direction of the net force on each particle. DUUUUUUUUUH! THIS IS SO EASY! LOOK IN YOUR BOK, IDIOTIC
  66. Physics

    An astronaut takes a space trip to newly discovered palnet X. measurements from earth indicate that: Mx=3Me and Rx=2Re. What is the acceleration of gracity gx on this planet as a multiple of ge?
  67. Maths!

    There has just been a planetary alignment of five planets in the system Blogg, all the astrologers have gone loopy, and they want to know when the next occurance of these five planets will happen again. Krypton the nearest planet to the sun takes 6 days to
  68. Physics

    The ink drops have a radius of 18.0 μm and leave the nozzle and travel toward the paper at a velocity of 20.0 m/s . The drops pass through a charging unit that gives each drop a positive charge q by causing it to lose some electrons. The drops then pass
  69. mechanics

    The angled beam ABC in the figure is composed of segments AB and BC joined at B at a 90˚ angle. Both segments have length L and uniform section stiffness EI. The beam is fixed at C and loaded by a downward concentrated force, P, applied at its free
  70. English

    What is another word for strong, as in strong in the mind and will not fall even at the toughest times. But I don't want to use strong-minded because that is more like determined. So, what is another characteristic for strong but it does not mean
  71. Physics

    The electric potential inside a charged spherical conductor of radius R is given by V = kQ/R, and the potential outside is given by V = kQ/r. Using Er = -dV/dr, derive the electric field inside and outside this charge distribution.
  72. PHYSICS

    Two 2.5-cm-diameter electrodes with a 0.10-mm-thick sheet of Teflon between them are attached to a 9.0V battery. Without disconnecting the battery, the Teflon is removed. a) What is the charge before the Teflon is removed? Q= C b) What is the potential
  73. College Physics.

    A pendulum has a period of 1.8 s. a) Its mass is doubled. What is its period now? b) Its length is doubled. What is its period now? The original pendulum is taken to a planet where g = 16 m/s2. c) What is its period on that planet?
  74. physics

    Satellite A orbits a planet with a speed of 10,000 m/s. Satellite B is twice as massive as satellite A and orbits at twice the distance from the center of the planet. What is Satellite B's speed?
  75. physics

    A 6 mC charge experiences a force of 6 N directed north. What is the electric field (magnitude and direction) at the location of the charge? Would E=1000 N/C and direction is north Find the force (magnitude and direction) on a -20 mC charge that replaces
  76. science

    Scientists believe that the waters covering the surface of the earth? a) are not visible from space b) are slowly drying up c) first appeared during the age of dinosaurs d) are a recent addition to our planet e) have been here since the crust solidified
  77. Physics, help please!

    A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the pressure formula P=M/V, but i kept subbing in other formulas, but i get stuck..can
  78. Geography and Society

    What is the primary function of Earth's atmosphere? a. to trap heat from the sun b. to shield the planet from harmful radiation*** c. to disintegrate space debris before it reaches the surface d. all of the above
  79. Physics

    A hypothetical spherical planet consists entirely of iron (p=7860 kg/m^3). Calclate the period of a satellite that orbits just above its surface. I started out with the pressure formula P=M/V, but i kept subbing in other formulas, but i get stuck..can
  80. science

    scientists believe that the waters covering the surface of the earth. a)are a recent addition to our planet b) first appeared during the age of dinosaurs c) have been here since the crust solidified d) are slowly drying up e) are not visible from space c
  81. physics

    Find the period of revolution of an artificial planet if the semi-major axis of the planet’s elliptic orbit is greater than that of the Earth’s orbit by 24 x 10^6 km. It is given that the semi-major axis of earth orbit round the sum is 1.5 x 10^8 km.
  82. physics

    a ball dropped from a cliff falls with a constant acceleration of 10m/s*s . through how much distance the ball will fall in the 5th second
  83. Physics

    Berry Bonds hits a baseball ball with an initial speed of 35m/s at an angle of 50 degrees with respect to the horizon. The playing field is surrounded by a 4.0m tall wall. Assume that when hit, the ball is initially very close to the ground. If the
  84. Physics

    Particle A has twice the mass of particle B, and carries three times the charge of B charge. Both particles are sent perpendicularly through a uniform magnetic field, each with the same kinetic energy. What is the ratio of the radius of evolution of
  85. Physics

    A cube of side L is place in a uniform electric field E = 3200 N/C. What is the net flux through the cube. Assume the electric field lines are parallel with the edges of the cube. Make sure you know why this is the answer. I know its not perpendicular or
  86. Physics

    a ball dropped from rest bag by a little boy from window of a three storey apartment how far has it fallen fter 3s What is the ball's velocity after 4 second of fall How far does ball fall during the lst 4 second?
  87. physics

    The charges 10micro C and -10 micro C are placed at a point A and B seprated by a distance of 10 cm. Find the electric field on the perpendicular bisector of ab at a distance of 12cm from its middle point.
  88. physics

    How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?
  89. physics

    Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the electric field at the center of the square? I don't
  90. physics

    A aluminum wire has a diameter and uniform electric field of imposed along its entire length
  91. Physics - please check over

    A charged particle moves at a constant velocity in a straight line through a region in space... a) is the electric field zero in the region? Explain b) is the magnetic field zero i the region? Explain I think a is yes because a charged particle will always
  92. physics

    Q: A blue ball is thrown upward with an initial speed of 23 m/s, from a height of 0.5 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 6.6 m/s from a height of 28.9 meters above the
  93. 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
  94. Physics

    Electrons are accelerated to reach a kinetic energy of 250 eV (= 4.0 x 10-17 J). If the acceleration is done in a distance of 0.20 m, what is the magnitude of the electric field causing the acceleration?
  95. science

    if a satellite moves in a circular orbit around a planet, the satellite has a constant: momentum velocity OR acceleration
  96. Science

    Acceleration due to gravity on planet mercury 3.7m/s.what would the mass of a person weighing 637 n on mercury
  97. Physics

    For an electric dipole, the electric field lines . . . A) Either start on the negative charge and go off infinitely or arrive from infinity and terminate on the positive charge. B) Either start on the positive charge and go off infinitely or arrive from
  98. physics

    In the problem, please assume the free-fall acceleration g = 9.80 m/s2 unless a more precise value is given in the problem statement. Ignore air resistance. A stone is thrown vertically downward from the roof of a building. It passes a window 15.0 m below
  99. Physics

    Trying to find escape speed from a planet and I am given the radius and gravitational field - g = 18 m/s^2. I have the conservation of energy, final energy is zero, I have the formula for V = sqrt 2GM/r, u = mgy. I have too many unknowns...I can't solve
  100. Chemisty

    The relative electric charge of a proton is +1, the relative electric charge of an electron is -1 and that of neutron is 0. What is electric charge and why is it relative? Thank a lot.