1. Physics

    A Tevatron can accelerate particles to energies in the TeV range (1.00 tera −eV = 1.00×10^12 eV ). Its circumference is 6.40 km, and in a certain medical experiment protons will be accelerated to energies of 1.25 MeV and aimed at a tumor to destroy its
  2. physics

    Please help! I want to make sure my answer is correct. Q:A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95 x 10^6 N. What
  3. Physics

    A cart of mass m (including the mass of the crane) has a pendulum hanging from a crane attached to the cart. There is no friction due to the normal force, u = 0, or wheel bearings of the cart wheels. The cart is experiencing and applied force to the left
  4. physical science

    a ball was dropped off a cliff and took 3.59s to fall to the water below. neglecting air resistance how fast in m/s was the ball moving just as it hit th water
  5. physics

    Velocity and displacement with uniform acceleration: 1. A car with an initial speed of 23.7 km/h accelerates at a uniform rate of 0.92 m/s^2 for 3.6 s. Find the final speed and the displacement of the car during this time. The final speed is 36 km/h. is
  6. science

    A pool ball is rolling at a velocity of 12 cm/s to the right when it is hit by another ball. It continues moving right at a velocity of 21 cm/s. If the collision lasts 0.45 seconds, what is the ball's acceleration?
  7. physics

    A soccer ball travelling at 15 m/s [E] bounces off of a goal post and ends up moving 12 m/s [S 30¡Æ E]. If the ball was in contact with the post for 0.10 seconds, calculate the acceleration of the ball.
  8. Physics

    A ball rolling with initial velocity of 40m/s(W) undergoes an acceleration of 5.0m/s^2(N) for a period of 6.0seconds. (A) what is the final velocity of the ball? (B) what is the displacement of the ball in the 6.0 sec
  9. Physics

    A ball rolling with initial velocity of 40m/s(W) undergoes an acceleration of 5.0m/s^2(N) for a period of 6.0seconds. (A) what is the final velocity of the ball? (B) what is the displacement of the ball in the 6.0 sec
  10. university of phri

    A body moving with uniform acceleration has a velocity of 12cm /a when its x coordinate is 3cm. If its x coordinates 2s later is -5cm, what is the magnitude of its acceleration
  11. Physics

    A 4700 kg vehicle on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the vehicle is 189 N backward: Determine the values of the other forces acting on the vehicle. Draw a free body diagram
  12. Electr. and Magnetism

    1) A charge of 80nC is uniformly distributed along the x-axis from x= 0 to x= 2.0m. Determine the magnitude of the electric field at a point on the x-axis with x=8.0m. a] 30 N/C b] 15 N/C c] 48 N/C d] 90 N/C e] 60 N/C 2) 3 point charges, 2 positive and one
  13. Physics Classical Mechanics

    You are holding a ball of mass m2 in your hand. In this problem you will solve for the upward force T⃗ that the tendon of your biceps muscle exerts to keep the forearm horizontal and the downward force F⃗ that the upper arm exerts on the
  14. outer space

    scientifically speaking (not philosophically or something), what is the probability that earth is the only planet in the universe that holds life? THANK YOUSOOO MUCH Depends on how one defines life. Zero is the best answer I can offer. Creationists would
  15. english

    In An Inconvenient Truth Earth is called the Goldilocks planet because A) The sun is at a balanced distance B) It has a significant wildfire population C) It's neither too hot or too cold for life D) The mineral content, especially cold and gold. I think
  16. physics

    A proton initially moves left to right long the x‑axis at a speed of 2 ´ 103 m/s. It moves into an electric field, which points in the negative x direction, and travels a distance of 0.2 m before coming to rest. What acceleration magnitude does the
  17. Physics

    It took a stopping train 41/4min to travel between two stations 11.2km apart.The train accelerated uniformly during the first 11/4min of the journey,and decelerated uniformly to rest during the last 3/2min of the journey.The train had moved with uniform
  18. Physics

    A proton moves in a constant electric field E from A to pointB. The magnitude of the elctric field is 4.2x10^4 n/c; Thedirection opposie to that of the proton. If the distance from pointA to point B is 0.18m, what is the change in the proton's
  19. Physics

    A soccer ball is released from the top of a smooth incline. After 3.80 s the ball travels 9.1 m. One second later it has reached the bottom of the incline. Assume the ball's acceleration is constant and determine its value ( m/s2)
  20. Physics

    At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when
  21. Physics

    An upward force of 35 N is applied via a string to lift a ball with a mass of 2.1 kg. (a) What is the net force acting upon the ball? (b) What is the acceleration of the ball?
  22. magnetism

    A charged particle with charge q is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendiculuar to the same magnetic field. The time to complete one full circular revolution for
  23. Physics

    A curve of radius 59.9 m is banked so that a car of mass 1.4 Mg traveling with uniform speed 50 km/hr can round the curve without relying on friction to keep it from slipping on the surface. At what angle is the curve banked? The acceleration due to
  24. Physics

    Problem: A Super Ball is thrown to the ground with an initial downward velocity of 0.70 m/s and pops back up to the hand of the thrower; the total time elapsed is 0.71 s. What height was the Super Ball thrown from? Do I use the formula x = x0 +
  25. PHYSICS

    A -3.0 nC charge is on the x-axis at x = -10 cm and a +4.0 nC charge is on the x-axis at x = 20 cm. At what point or points on the y-axis is the electric potential zero?
  26. math nid this asap tyy

    (Velocity and acceleration.) The acceleration of gravity on the surface of the Moon is a = 1.6 m/s2, as opposed to g = 9.8 m/s2 on Earth. An Olympic high-jumper can jump to about 2.35 m on the surface of the Earth. What height could an Olympic high-jumper
  27. finite

    a basket ball player makes 65% of her free throws find the probability that she will make at least 7 of her next 8 free throws
  28. Physics

    A 63-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a magnitude
  29. physics

    A 65-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a magnitude
  30. Physics

    A 63-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a magnitude
  31. Physics

    A certain type of propeller blan can be modeled as a thin uniform bar 2.50 m long and of mass 24.0 kg that is free to rotate about a frictionless axle perpendicular to the bar at its midpoint. if a technician strikes this blade with a mallet 1.15 m from
  32. Physics GO! (82)

    To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 365 N. Neglect any friction between the rope
  33. Physics

    A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the
  34. Physics

    A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the
  35. SCIENCE - Pls HELP

    A proton (with a mass, mp = 1.673 x 10^-27 kg & electrical charge, e = 1.602 x 10^-19) and an electron (with a mass, me = 9.109 x 10^-31 kg & electric charge -e = -1.602 x 10^-19) are not moving & at a distance of 1.000 x 10^-10 m apart.... (assuming the
  36. Ap calc

    At a football game, at the instant the ball goes into play, a player at the line of scrimmage begins running along the edge of the field at a rate of 25 ft/sec. The quarterback receives the ball and is forced into position 30 feet across the field from the
  37. physics

    a ball is thrown verrically upward. the speed of ball was 30m/s when it had reached ½ of its maximum height. 1) how high did the ball rise 2) find the velocity and acceleration 1 second after it is thrown
  38. physics

    starting from rest, a ball rolss, down an incline ata constant acceleration of 2meters per second what is the velocity of the ball after 8.5 seconds? how far does the ball roll in 10 seconds? any one can help pleasse im stuck
  39. PHYSICS!!

    free body diagram of a 4 kg bucket accelerating downward 2 meters per second squared
  40. Physics

    Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to 1/3 its original value and the distance between the charges is doubled, what is the resulting magnitude of the electric force between them?
  41. Physics

    A 4700 kg truck on a level surface experiences a force applied due to the engine of 3700 N forward. If the force of friction acting on the truck is 189 N backward: a) Determine the values of the other forces acting on the truck. b) Draw a free body diagram
  42. Phyics

    A pool ball leaves a 0.75-meter high table with an initial horizontal velocity of 30 m/s. Predict the time required for the pool ball to fall to the ground.
  43. Physics

    Two masses are held while suspended on a frictionless pulley.Their masses are 0.250 kg and 0.200 kg. a. Compute for the acceleration of the masses once they are released? b.Find the tension on the string m1 accelerates upward and m2 downward Let a be the
  44. physics

    A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 18 m/s at angle of 35 degrees above the horizontal. The top of the fence is 4 m
  45. physics

    a heavy object is dropped from the top of a 25 m tall building and it reaches the ground in 2.26 seconds determine the acceleration due to gravity how far did the object fall during the first second how far did the object fall during the 2nd second
  46. physics

    A proton travels to the east at 3.5*10⁶ m/s as it enters a region of uniform magnetic field. The magnitude of the magnetic field is 0.15 T and its direction is 30° north of east. Find the magnitude of the force on the proton at the moment it enters the
  47. Physics

    A tennis ball with a velocity of 24.4 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 16 m/s. If the ball is in contact with the wall for 0.013 s, what is the average
  48. physics

    A steel ball has a mass of 4.0kg and rolls along a smooth, level surface at 62m/s. A) Find its kinetic energy(i got this and its 7688 joules) B)?????-At first, the ball was at rest on the surface. A constant force acted on it through a distance of 22
  49. Physics

    In a Thomson's e/m experiment , with an accelerating potential of 150V and a deflecting electric field of magnitude 6*10^6 N/C , the electrons travel in a straight line . i)At what fraction of the speed of light do the electrons move? ii)what magnitude of
  50. science

    a 600 g pool ball moving at 2.0m/s hits a second pool of the same mass at rest. the first ball moves off at 1.5m/s at an angle of 30 degrees from the original direction. assume the surface of the pool table to b frictionless find the angle at which the
  51. Physics Conducting Spheres

    1. Two concentric conducting spherical shells have radii of 0.145 m. and 0.215 m. The inner sphere bears a charge of -3.00E-08 C. An electron escapes from the inner sphere with negligible speed. Assuming that the region between the spheres is a vacuum,
  52. Physics

    Charge A and charge B are 2.00 m apart, and charge A is +3.90 C and charge B is +4.00 C. Charge C is located between them at a certain point and the force on charge C is zero. How far from charge A is charge C?
  53. PHYSICS

    Suppose that the electric potential outside a living cell is higher than that inside the cell by 0.0928 V. How much work is done by the electric force when a sodium ion (charge = +e) moves from the outside to the inside? no idea how to do this can i just
  54. Physics

    Mike wants to make a free throw; he realizes that if the ball is exactly 20cm above the hoop as it hits the backboard at the top of its trajectory, it will go in. The free throw line is 4.5 m from the plane of the backboard and the hoop is 3 meters from
  55. physics homework 8!

    To hoist himself into a tree, a 72.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 365 N. Neglect any friction between the rope
  56. Physics please help!!

    Assume a circular orbit. If a planet's distance from it star is multiplied by 25 times, then by how many times is its orbital period T multiplied ?
  57. science

    if earth is one astronomical unit from the sun and has a period of 1 year, approximately how far is planet X form the sun if it has a period of 26 yearS
  58. phsics multiple choice

    1)A coil of length 1cm has N turns and carries an electric current I. It creates at a point M a magnetic field of intensity B. -If a current 3I is sent in the coil the field strength at M becomes: a. 3B b. B/3 c. B -If the number of turns per unit length
  59. Physics

    A 5.6 kg ball (I=2/3mr^2) starts on a hill 11.3 m above level surface of the ground. The ball then rolls (without slipping) down the hill. What is the linear speed of the ball when it reaches the bottom of the hill?
  60. English

    Identify the adverb what it modifies and whether the word it modifies is a verb, adjective, or adverb What about these two? The two teenagers climb high in order to cut branches that might suddenly fall on a house or a wire. adverb suddenly describes fall
  61. Science

    How many minutes are required for a radio signal to travel for Earth to a space station in Mars if the planet Mars is 7.83 x 10 to the 7th km from Earth?
  62. Physics

    A block of mass m is attached to a string and suspended inside an otherwise empty box of mass M. The box rests on a scale that measures the system’s weight. (a) If the string breaks, does the reading on the scale change? Explain your reasoning. (b)
  63. PHYSICS

    An object weighs 480 N on earth. what would its weight be on a planet whose mass is twice the mass and half the ratio of the earth?
  64. aSTRONOMY

    If one of your ellipss were a planet's orbit, where would the sun be on the page? his was a MiniLab to show planets orbit in the Sun in ellipses.
  65. physics

    Please help! The planet Mercury has a radius of about 0.38 Earth radii and a mass of only 0.055 Earth masses. Estimate g on Mercury
  66. Physics

    A planet has a period of revolution about the Sun equal to T and a mean distance from the Sun equal to R. T^2 varies directly as __________. R R^2 R^3 R^4 R^5
  67. Science

    1) A person roller skates down a street heading east. Which of the following would be true about friction in this scenario? a; friction does not affect the skates in the scenario b; friction pulls the skates wheels eastward c; friction pulls the skates
  68. physics

    A helium nucleus (charge = 2e, mass = 6.63 10-27 kg) traveling at a speed of 6.20 105 m/s enters an electric field, traveling from point circle a, at a potential of 1.50 103 V, to point circle b, at 4.00 103 V. What is its speed at point circle b?
  69. physics

    Where did the waste energy go to? A ball rolls off the ramp on the edge of a table heading downward and hits the ground. Was the energy lost or gained a direct relation to the distance that the metal ball travelled along the ramp?
  70. physic

    .Question part Points Submissions 1 ¨C/1 0/2 Total ¨C/1 ...A volleyball is spiked so that it has an initial velocity of 18 m/s directed downward at an angle of 50¡ã below the horizontal. What is the horizontal component of the ball's velocity when the
  71. physics

    A person jumps off a diving board 4.3 above the water's surface into a deep pool. The person's downward motion stops 2.1 below the surface of the water.
  72. Chemistry

    I am not sure if I answered the question below correctly and if I need all the information in my answer. Do I need all of this information? Why does the simplest ketone have 3 carbon atoms and no less? The simplest ketone has three carbon atoms and no less
  73. Physics

    A ball is thrown horizontally from the top of a building 17.6 m high. The ball strikes the ground at a point 67.7 m from the base of the building. The acceleration of gravity is 9.8 m/s2. Find the time the ball is in motion
  74. Physics

    The electric field from an infinitely large and uniformly charged sheet is independent of the distance from the sheet, yet the individual charges in the sheet all produce fields that object the inverse square law. Why doesn't the field get weaker at
  75. Physics

    if a ball is released from a certain height.The velocity-time graph which represents the motion of the ball as it bounces vertically on a concrete floor. The interaction time of the ball with the floor negligibly small and is thus ignored. DESCRIBE THE
  76. physics

    I have been stuck on this for a while now and cant figure out what it is i am doing wrong HELP!!! A tennis ball with a velocity of 15.5 m/s is thrown perpendicularly at a wall. After strik- ing the wall, the ball rebounds in the opposite direction with a
  77. Physics

    In order to open tha clam it catches, a seagull will drop the clam repeatedly onto a hard surface from high in the air until the shell cracks. if a seagull flies to a height of 16.4m, how long will the clam take to fall? The acceleration of gravity is
  78. Physics

    In order to open tha clam it catches, a seagull will drop the clam repeatedly onto a hard surface from high in the air until the shell cracks. if a seagull flies to a height of 16.4m, how long will the clam take to fall? The acceleration of gravity is
  79. Physics

    Remember the Poynting vector? The magnitude of this vector gives the amount of energy per second that flows through a unit area (in the direction it gives) because of the presence of a combination of electric and magnetic field, like in an electro-magnetic
  80. AP Physics- Impulse

    A tennis ball traveling at 25 m/s has a mass of 58.5 g and bounces off a wall with a speed of 22.5 m/s. The impact took 3.33 ms. What is the magnitude of the average force exerted by the wall on the tennis ball? I want to solve for acceleration to plug
  81. physics

    Two identical balls each have a charge of -7.5x10^-6C. The balls hang from identical strings that are 8‹ from the vertical because of the repulsive force between the charged balls. The balls are separated by a distance of 10cm. What is the tension in
  82. Physics

    A batted baseball leaves the bat with a velocity of 41.4 m/s at an angle of 51.2°. If the ball just barely clears the 3.05 m (10 ft) center field wall, a. How long was the ball in the air? ___s b. What must the range be from home plate to the center field
  83. physics

    A toy plane p starts flying from point A along a straight horizontal line 20 m above ground level starting with zero initial velocity and acceleration 2 m /s² as shown. At the same instant, a man P throws a ball vertically upwards with initial velocitu
  84. Physics

    In a thundercloud there may be an electric charge of 18 C near the top of the cloud and −18 C near the bottom of the cloud. If these charges are separated by about 7 km, what is the magnitude of the elec- tric force between these two sets of charges?
  85. Science

    Pluto alters the orbit of which planet? Uranus Saturn Neptune * Jupiter My guess is Neptune? There is not alo of info. that said the word "alters"? Help please....
  86. physics

    Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23 kg) when Mars is at its closest to Earth (distance = 5.6* 10^10m).
  87. Math

    The planet Neptune has a radius of 15000 miles and rotates one revolution every 18 hours. What is the linear speed of a point on its equator, in miles per hours?
  88. uniben

    A rubber ball is dropped from a height of 10meters,suppose it rebounds one-half the distance after each fall.find the total distance the ball travels before coming to rest.
  89. Physics

    Starting with an initial speed of 3.86 m/s at a height of 0.480 m, a 1.78-kg ball swings downward and strikes a 4.75-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.78-kg
  90. physics

    In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.0 1011 m, with a period of 980 days. Find the mass of the star.
  91. Physics

    In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.0 1011 m, with a period of 1000 days. Find the mass of the star.
  92. Physics

    In recent years a number of nearby stars have been found to possess planets. Suppose the orbital radius of such a planet is found to be 5.5 x1011 m, with a period of 1210 days. Find the mass of the star.
  93. Physics

    In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.3 1011 m, with a period of 1080 days. Find the mass of the star
  94. Science

    Description of each transition or step of the cycle Here are a list of the steps to include: a. EXTRACTION b. COMBUSTION c. RESPIRATION d. PHOTOSYNTHESIS e. DIFFUSION f. DECOMPOSITION g. SEDIMENTATION Persuasive explanation of why the carbon cycle is so
  95. physics

    If the field strength is E = 9 V/m a distance of 1 m from the charge, what is the field strength E a distance of 3 m from the charge?
  96. college

    Electric fields are vector quantities whose magnitudes are measured in units of volts/meter (V/m). Find the resultant electric field when there are two fields, E1 and E2, where E1 is directed vertically upward and has magnitude 96 V/m and E2 is directed
  97. Physics

    Three charges are placed at the vertices of an isosceles triangle as shown in the figure. If q = 5.00 μC, calculate the electric potential at the midpoint of the base of the triangle. Also calculate the electric field vector at the same point due to
  98. magnets

    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
  99. 9th grade

    the atmosphere..? a. creates tides b. has no effect on heat gain or loss c. allows heat to escape quickly in order to cool the planet d. keeps heat from escaping too quiclkly into space.
  100. physics

    a superball of mass .125 kg is dropped onto a concrete floor from a height of 1m it bounces back at a height of .9m. What is the net force acting on the ball before and after its released? Work done by the net force while the ball is falling until just