physics please HELP !

74,760 results, page 76
  1. Physics

    Two objects attract each other gravitionally with a force of 2.5 *10^-10 N when they are .25m apart. Their total mass is 4.0kg. Find their individual masses.
  2. physics

    As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 its mass is 0.145. A) What is the baseballs acceleration in m/s^2 and in g's? B) What is the size of force acting on it?
  3. physics

    If a flea can jump straight up to a height of 0.310 m, what is its initial speed as it leaves the ground? How long is it in the air?
  4. physics

    A 4.3kg object moves across a floor with a velocity of + 8.2 m/s and slides to rest in 5.8 s. The net force producing this acceleration is:
  5. physics

    A vector points 34.8 degrees to the Northeast with magnitude 15. What are the north and east components that make up the remainder of the triangle?
  6. Physics

    What is the magnitude of buoyant force acting on a 720 cm^3 toy submarine floating in fresh water? (D_water =1 g/cm^3)
  7. physics

    The difference in energy between allowed oscillator states in HBr molecules is 0.330 eV. What is the oscillation frequency of this molecule?
  8. Physics

    Your swimming pool is square and 4.9 m on a side. It is 3.9 m deep in the morning. If the temperature changes by 44°C during the afternoon, how much does the depth of the water increase?
  9. Physics

    A Ferris wheel has a radius of 14 m. What period of rotation would give the occupants a feeling of "weightlessness" at the top? __s
  10. Physics

    A golf ball is struck with a five iron on level ground. It lands 85.0 m away 4.60 s later. What was the magnitude and direction of the initial velocity
  11. Physics

    Does the frequency of light change as it enters a different substance? I know that the speed changes. The question might seem easy, but I have contradicting notes, so I'm confused.
  12. physics

    A 350-Hz tuning fork is held above a closed pipe. Find the spacings between the resonances when the air temperature is 20°C.
  13. Physics

    Find the electric field at P in the figure shown below. (Take r = 1.5 m and θ = 41°. Measure the angle counterclockwise from the positive x-axis.)
  14. Physics

    Ivan rides his motorcycle 4.5 times around a circular track that has a radius of 100 m a)what is the distance traveled and b)what is the displacement?
  15. physics

    Calculate the density of an object with a mass of 109 grams and a volume of 123 ml. (Round your answer to 3 digits.)
  16. Mabel hill, physics

    Two force,3N and 4N act on a body in the direction due north and east respectively. Calculate their equilibrium?
  17. physics, QUESTION = At what depth below the free surface of oil having a density of 600kg/m^3 will the pressure be equal to 1bar.
  18. physics - magnetism

    A positive and a negative particles enter magnetic field at the same angle and with the same velocity. How different would be the path of each particle?
  19. To rajesh jain

    Do not post any question more than once. Currently, I don't see any physics tutors online. Please be patient and wait for them to find what you have already posted.
  20. Physics

    A 185kg refrigerator is loaded into a van by moving it up a 10.0m long frictionless ramp that is at an angle of 11.0 degrees. How much work is done?
  21. physics (pendulums)

    i understand the PE and KE and MKE points and how gravity effects a pendulum, but how does kenetic and potential energy effect it?
  22. Physics

    What would be the appearance of the speed-time curve if the fallng body where so light that the effect of air friction could not be neglected?
  23. physics

    A football is thrown upward at a 30 degree angle to the horizontal. To throw a 40.0-m pass, what must be the initial speed of the ball?
  24. physics

    need help with tthe first question on this page!!! please
  25. physics

    A duck waddles 2.3m east and 7.0m north. what are the magnitude and direction of the ducks displacement with respect to its original position?
  26. physics

    calculate the force exerted on a rocket given that the propelling gases are expelled at a rate of 1000 kg/s with a speed of 60,000 m/s.
  27. physics

    Assume that here in sussex we live at exactly latitude 45 degress. Calculate the tangential speed, in m/sec and in mph that we are rotating at
  28. College Physics

    What will a spring scale read for the weight of a 73 kg woman in an elevator that moves upward with constant speed of 5.4 m/s?
  29. PHysics

    What is the total energy of a 15-kg mass attached to a spring oscillating horizontally with an amplitude of 20 cm and an angular frequency of 32 rad/s?
  30. physics

    an object fall from rest of total height h and covers a distance of h/2 in last second find out time it remain in air
  31. physics

    A ball is thrown directly downward with an initial speed of 7.00 m/s, from a height of 30.4 m. After what time interval does it strike the ground?
  32. Career Planning

    What job opportunities are offered for a bachelors degree of joint honours in both physics and math besides teaching?
  33. Physics

    An object is thrown with speed of 17 m/s at an angle of 550. find the time it takes to reach its maximum height.
  34. physics

    Two positive charges of 6.83 µC each are 673 cm apart. Find the electric field midway between them. The value of the Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 .
  35. physics

    A circus motorcylist can ride his motorcyle through a loop with a radius of 15 meters. What is the minimum velocity with which he can accomplist this feat?
  36. Physics

    Two trains approach each other on parallel tracks. Each has a speed of 20.0 km/hr with respect to the earth. If they are initially 18.0 km apart, how long (in seconds) will it be before they pass each other?
  37. Physics

    The highest that George can suck water up a very long straw is 2.0 m. (This is a typical value.) What is the lowest pressure that he can maintain in his mouth?
  38. Physics

    Two identical loudspeakers are 2 m apart. A person stands 4.6 m from one speaker and 3.4 m from the other. What is the lowest frequency at which destructive interference will occur at this point?
  39. physics

    The specific heat capacity of pure water at 15.0 degrees celsius is 4184J/(kg.k). Convert this to kcal/(kg.k). pls help
  40. physics

    What potential difference is needed to stop an electron having an initial speed of 3.70x 105 m/s? Answer in volts
  41. physics

    A car accelerates uniformly from rest to a speed of 21.5 km/h in 6.9 s. Find the distance it travels during this time. Answer in units of m
  42. Physics

    A 45 kg child sits on a 5 kg sled and slides down a 117 meter, 31 degree slope, to the nearest m/s what is his or her speed at the bottom?
  43. Physics

    Find the terminal velocity of a raindrop of diameter 3mm when it fall through atmospheric air (Appointment and is 249.7m/s)
  44. physics

    a man walked 32.5m souhward and 78m westward. if it took him 30 minutes to reach his destination.find his average speed?
  45. Physics

    It takes you 10min to walk with an average velocity of 1.2m/s to the north from the bus stop to the restaurant entrance. What is your displacement?
  46. physics

    A skier (m=55.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 4.90 m and D = 10.6 m, find H.
  47. physics

    How much would the time keeping of a pendulum clock be affected by taking it to the moon? Gravity is 1.6m/s ^2, compared with 10m/s ^2 on the earth.
  48. Physics

    A satellites are placed in a circular orbit that is 1.62 × 108 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?
  49. physics

    Find the limiting velocity of a rain drop assuming diameter of 5.0×10^-4m.The density of air relative to water is 1.3×10^-3
  50. Physics

    Two ants race across a table 58cm long. One travels at 4.8 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one? Answer in units of cm
  51. physics

    A particle (p) moves along the curved surface (s). Show that p will remain in contact with s provided that at all times its speed v≥√rgcosteta.
  52. Physics

    If you were to jump from an airplane at an altitude of 15000 ft. and fall toward the Earth at 100 mph how long would it take to reach the surface?
  53. Physics

    Determine the stopping distances for a car with an initial speed of 93 km/h & human reaction time of 0.80 s, for an acceleration a=−4.0m/s2.?
  54. Physics

    A freight elevator has a mass of 240 kg. Find the tension in the cables (to the nearest whole number) when it ascends with an acceleration of 4 m/s2.

    Calculate the maximum height the tank shell reaches using the initial speed (18 m/s), half-time(1.8), and angle(75).
  56. Physics

    How long will it take a charged 80-ìF capacitor to lose 20 percent of its initial energy when it is allowed to discharge through a 45 ohm resistor?
  57. physics PLEASE HELP ME

    A ball rolling down a hill was displaced at 19.6m while uniformly accelerating from rest. If the final velocity was 5.00 m/s what was the rate of acceptation?
  58. college physics

    A cook holds a 1.90 kg carton of milk at arm's length. What force B must be exerted by the biceps muscle?
  59. Physics

    A ball rolling down a hill was displaced at 19.6m while uniformly accelerating from rest. If the final velocity was 5.00 m/s what was the rate of acceptation?
  60. Physics

    What types of material would be a good choice to shield a sensitive electronic device from stray electric fields?
  61. physics

    A rock is thrown upward at an angle of 50 degrees with respect to the horizon. As it rises, its vertical component of velocity does what?
  62. physics

    a bar is pushed so that it slides across the floor. how far will it go, given the coefficient of kinetic friction is 0.25, and the push imparts an initial speed of 2.5m/s?
  63. Physics

    An unbalanced forced of 2.5x10^3N is applied to an object with a weight of 3.0x10^3N on a frictionless surface. What is the objects acceleration?
  64. physics

    How do you measure a unidentified capacitor when you have a identified one as well as voltmeter, a ammeter, a resistor and a light bulb as well as 3 1,5 batterycells. You have a conductinhcords?

    Give some examples of applications that resulted from work done by physicists? Radios, Televisions, CD's, Computers, etc. Is my answer correct?
  66. physics

    What state of the art computer technology is used to train pilots when wanting to copy the experience of flying an aircraft?
  67. physics

    Two freight cars, each with a mass of 3.9 105 kg, collide and stick together. One was initially moving at 3.2 m/s and the other was at rest. What is their final speed in m/s?
  68. Physics

    An airplane lands and starts down the runway at a southwest velocity of 43 m/s. What constant acceleration allows it to come to a stop in 1.2 km?Answer is in ___ m/s2.
  69. physics

    Is this true or a trick question? In order to get a piano to start moving, you must push against it with a larger force than it pushes on you?
  70. Physics

    Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 83 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?
  71. Physics

    A red colored ball tossed upward reaches a maximum height of 3.0m. show that the initial speed is 7.7m/s^2.
  72. Physics

    An olympic hurdler is in a race. He is running at 10 m/s and jumps over a hurdle. How high did he jump if he was moving at 1m/s as he crossed the fence?
  73. physics

    Who developed modern periodic table? Descibe particle arrangements & movement for each phase of matter. (Thank you for helping me)
  74. physics (science)

    A body travels from rest with acceleration 8m/s square . Find its velocity when it has covered a distance of 100m
  75. Physics

    Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.
  76. physics

    Determine the ionization energy required to extract the electron totally out of a hydrogen atom, and put it at rest
  77. physics

    a uniform rod is 1m caring a weight of 100N calculate its tension of the string holding it an the reaction at the hinge
  78. Physics

    New York's 300 m high Citicorp Tower oscillates in the wind with a period of 6.80 s. Calculate its frequency of vibration.
  79. law of conservation of momentum.. physics

    The boat would sink a little bit in the water and move in the direction that the melon was thrown to you.
  80. physics

    A car traveling initially at 9.52 m/s acceler- ates at the rate of 0.609 m/s2 for 3.62 s. What is its velocity at the end of the accel- eration?
  81. physics

    If a ball is kicked at 35 degrees above the horizontal, what is the speed to barely clear the 3m tall goal post 60m away?
  82. physics

    A boy moves 5km eastward and then change his direction towards westward in 4km.calculate his resultant displacement
  83. Physics

    A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.
  84. physics.

    I have tried the problems. the only thing is the difference in names. I have been able to figure out the tendon problem as well as this very question. I am having a hard time doing the other two. It would be nice to get some help. thanks.
  85. physics

    If you push a box a distance of 2,000 meters with a force of 1 newton, how many Calories have you used? 1 Calorie= 4,187 Joules
  86. Physics

    If you look at yourself in a shiny Christmas tree ball with a diameter of 10.5 cm when your face is 35.0 cm away from it, (a) where is your image? (b) Is it real or virtual? (c) Is it upright or inverted?
  87. Physics

    A box is given a push up a 26.0° incline. When it reaches the bottom again it is only going 0.51 its original speed. Find the coefficient of kinetic friction.
  88. law of conservation of momentum.. physics

    The boat would sink a little bit in the water and move in the direction that the melon was thrown to you.
  89. physics

    Measure of two quantities along with the precision of respective measuring instrument is A = 2.5 m s–1 ± 0.5 m s–1 B = 0.10 s ± 0.01 s The value of A B will be (a) (0.25 ± 0.08) m (b) (0.25 ± 0.5) m (c) (0.25 ± 0.05) m (d) (0.25 ± 0.135) m please
  90. Physics

    For position vs time graphs, when you compare your motion to thee original graph, how can you tell when you were moving too slowly? Too quickly?
  91. physics

    If the 60-kg player is running forward at 7.0m/s when she makes contact with the dummy, what is the players velocity at the end of the 1.20s impact?
  92. physics

    A particle is projected with a speed of 25 m/s at an angle of 40 degrees above the horizontal. "What is the time taken to reach the highest point of trajectory?"
  93. physics

    a car acclerate uniformly from rest andattains a speed of 40m/sin 10second itcoversa distanceof
  94. Physics

    A 3kg block is resting on a table with a coefficient of friction of 0.4. It is now pushed with a force of 15n. What is the acceleration of the book?
  95. physics

    You are driving north on a highway. Then, without changing speed, you round a curve and drive east. Does your velocity change
  96. physics

    if you have and open end air column with a length of 75.0 cm and the fifth harmonic is 1175 hz, what is the fundamental frequency? what is the speed of the wave?
  97. physics

    if a 400g ball moving 1.2 m/s [north], receives an impulse that changes its direction and speed to 2.8 m/s [east], what is the change of momentum?
  98. physics

    Calculate the maximum speed at which the cargo rounds the bend without skidding if the coefficient of friction between the tyre an the ground is 0.5?
  99. physics

    Two forces of 5kg wt and 10kg wt are acting at an inclination of 120 o between them. Find the magnitude and direction of resultant force.
  100. AP Physics<<help

    A 1.7 kg bundle starts up a 30 degree inlcine with 105 J of Kinetic Eneergy, How far will it slide up in the plane if the coefficient of friction is .3 ?