1. physics

    what would be the significance of the photoelectric effect graph if it a) passed through the origin b) had a positive y intercept
  2. Physics

    If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?
  3. physics

    If you are driving 100 along a straight road and you look to the side for 1.9 , how far do you travel during this inattentive period?
  4. Physics

    a westward force of 20 N acts on a 2.0 kg object moving eastward at 60 m/s for 2.0 s. What is the resulting velocity?
  5. 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?
  6. physics

    2) The weight of tank is 50 000 kg, area of his tracks is 5 m2. What pressure acts on the ground?
  7. physics PLEASE HELP!

    what are three possible thicknesses that a soap film should be to transmit yellow light ? (Lambda=590nm)

    What is your average power if you lift a 33.8 kg box at a constant speed to a height of 3.27 m in 6.10 s?
  9. Physics

    A steel guitar string is 73 cm long and 0.15 mm in diameter. If it's under tension of 1.5kN, how much is it stretched?
  10. physics

    How much force is needed to accelerate a 50kg rider and his 250kg motorcycle at 4m/s27
  11. physics

    How long would it take for a stone to fall 250m traveling at a speed of 10m/s squared?
  12. physics

    If a car rolls gently(vo=0) off a vertical cliff, how long does it take to reach 85km/h?
  13. Physics 30

    If a truck moving at 30km/hr accelerates at 2.5m/s^2 to 50 km/hr, what time (in sec) does it take? a. 2.22s b. 5.56s c. 8 s d. 28.8s
  14. physics

    wally holds a pillow over his head for an hour does he do any work ? if not y? what energey changes is accouring?
  15. physics

    If a man weighs 820N on d earth what would be on Jupiter, where the acceleration due to gravity is 25.9m/s
  16. Physics help!!!

    What potential difference is required in an electron microscope to give electrons a wavelength of 0.05 nm ?
  17. physics

    Is it possible for a frictional force to increase the mechanical energy of a system? If so, give examples.

    What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high?
  19. Physics

    Why is parallel circuit brighter compared to series? ( Only one bulb is present in both circuits) Thanks :)
  20. physics

    Three charges of 5 x 10^(-6) C are placed on the vertices of an equilateral triangle of 10cm. Calculate force on each charge.
  21. physics

    At what height above Earth's surface is the gravitational acceleration reduced from its sea-level value by 0.60%?
  22. Physics

    Two positive charge of 12cand 8c are 10cm apart each other. The work done in bringing them 4cm closer is
  23. Physics 11

    A girl stands 2.5 m infront of a plane mirror. If she sees someone else 2.0 m behind her, how far is she from the image of that person?
  24. Physics

    If two forces act at a point making an acute angle between them, find the resultant.
  25. Physics

    Sodium has bcc packing. If a distance between two nearest atoms is 3.7 A* then what is the lattice parameter?
  26. physics

    two point charge q1=50c , q2=10c are lactated at (-1,1,-3)m, and (3,1,0)m, respectivly. Find the force on q1.?
  27. physics

    a baseboard heater draws a current of 10.0A. How much charge passes through it in a time of 30 min?
  28. physics

    How much potential energy does a 60kg skater have before she starts her ride, 12m above the ground?
  29. Health Physics

    The human body is 20-25 percent efficient. In what form is energy lost?
  30. physics

    a gun shoots a potato from a height of 6 feet. how long does it take to hit the ground.
  31. Physics

    Using volume of a sphere, calculate the average density of Saturn (radius = 60,268 km).
  32. physics

    the speed of a bullet of mass is 40gram is 216km/h what is the kinetic energy in joule
  33. physics

    A constant net force of 1500 N gives a toy rocket an acceleration of 2.5 m/s2. what is the mass in kg?
  34. physics

    A meteoroid is speeding through the atmosphere, traveling east at 15.5 km/s while descending at a rate of 10.6 km/s. What is its speed, in km/s?
  35. Physics

    What is the typical wavelength of an X-ray ? I searched google and I couldn't find it. If you know the answer I'd appreciate it .
  36. physics

    the value of acceleration due to gravity is not equal to 10m,give reasons to support
  37. Physics

    Air in a balloon does 50 J of work while absorbing 70 J of heat.What is its change in internal energy?
  38. AP Physics

    If you are driving 116 km/h along a straight road and you look to the side for 1.0 s, how far do you travel during this inattentive period?
  39. physics

    How much heat in KJ is needed to change 3.0 kg of ice at -10C into (superheated) steam at +150C ?
  40. physics

    Consider the equation -mv0 +3mv0 = 4mvf. Where m and v0 are constants, Solve for vf. Simplify answer.
  41. physics

    If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature?
  42. physics

    a polar satellite is launched at 850 km above Earth .find its orbital speed.
  43. physics

    A tank has a length of 0.18 m, a width of 0.78 m, and a height of 0.44 m. If it is filled with water, how many kilograms does it weigh?
  44. physics

    determine the speed of a mass (1.00kg) after it has fallen a vertical distance of 12.5 meters
  45. physics

    If a coffee can has a radius of 63.0 cm and a height of 15.8 cm find its volume round to neaerest cm3
  46. Physics

    Given that q = +17 mu C and d = 14 cm, find the magnitude of the net electrostatic force exerted on the point charge q2.
  47. Physics

    If 2.0 J of work is done in raising a 280g apple, how far is it lifted? I would say F= 2.0/180 but that doesn't really sound right...
  48. physics

    A tank has a length of 0.18 m, a width of 0.78 m, and a height of 0.44 m. If it is filled with water, how many kilograms does it weigh?
  49. physics

    How center mass affects an arrows distance traveled (include source)
  50. physics

    State how the centripetal force is provided in the case of a satelite orbiting the earth
  51. physics

    Two 2.5 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
  52. physics

    If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 63 cm*29 cm*20cm, what would its mass be?
  53. physics relativity

    How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass?
  54. Physics

    How fast must a plane fly at a latitude of 41.9° so that the sun stands still relative to the passengers?
  55. Physics

    On a dt graph if there is a curve from 1 decreasing to 1.2 in an interval does is the velocity and acceleration + or 9? And is it slowing down or speeding up or neither?
  56. physics

    how much energy is stored in a pinball machine spring (constant=750N/m) that is compressed 3 cm?
  57. physics

    Two 4.3 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books
  58. physics

    How much current flows through two resistors with resistances of 10 Ω and 20 Ω that are connected in series and to a 10 V power supply?
  59. physics

    Calculate the total force of the atmosphere acting on the top of a table that measures 1.9 m by 2.3 m.
  60. Physics

    a 50 g marble is released from a height 1 m above the floor. Calculate its momentum just before hitting the ground
  61. PHYSICS!!

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

    Find the final speed of the train assuming no friction. Answer in units of m/s
  63. physics

    A tuning fork produces a wave at 280 Hz and with a wavelength of 1.5 m. Calculate its velocity.
  64. physics

    Why does cross sectional area of a liquid stream reduces while falling vertically??
  65. Physics

    A 700 kg plane is traveling at 90 m/s at an altitude of 1500 m. What is the total mechanical energy?
  66. Physics

    (a) Calculate the speed of a proton after it accelerates from rest through a potential difference of 285 V.
  67. physics

    At the end of a race a runner decelerates from a velocity of 7.00 m/s at a rate of 0.400 m/s^2. (a) How far does she travel in the next 15.0 s
  68. Physics

    Find the change in the force of gravity between two planets when the distance between them is decreased by a factor of 4.7
  69. physics

    What are the factors that affect the quantity of heat needed to raise the temperature of a substance?
  70. physics

    Calculate the net force needed to give an acceleration of 0,5m/s to a trolley with a mass of 1,5 kg
  71. physics

    5. What is the electric potential at the center of the square shown in the figure below? Assume that q1 = 1 x 10-8 C, q2 = -2 x 10-8 C, q3 = 3 x 10-8 C, q4 = 2 x 10-8 C and d = 1 meter.
  72. Physics

    Aircraft with acceration of magnitude of 42.5 m/s. If starting from rest how long will it take to travel a 2.6 km runway?
  73. Physics

    In ten to fifteen pages, write the applications and effects of solid expansion
  74. physics

    Devise a method for measuring the coefficient of friction between two surfaces using an inclined plane
  75. Physics

    Calculate the total energy of 4.0 kg object moving horizontally at 20 m/s 50 meters above the surface. Please help me!!!!!
  76. physics

    When sand is poured on a rotating disc what happen to its angular velocity ? explain
  77. physics

    a fire hose held near the ground shoots water at a speed of 6.4m/s, at what angle should
  78. physics

    how can we derive the work-energy theorem form Newton's second law of motion?
  79. Physics

    .17 kg hockey puck initial velocity 21 m/s stops 62m away. what is coefficient of friction?
  80. physics

    What is the electric potential at the center of the square shown in the figure below? Assume that q1 = 1 x 10-8 C, q2 = -2 x 10-8 C, q3 = 3 x 10-8 C, q4 = 2 x 10-8 C and d = 1 meter.
  81. physics

    A fisherman's scale stretches 3.5 cm when a 2.1 kg fish hangs from it. What is the spring stiffness constant?
  82. physics

    A man moves along a semi-circle. What is the relation between distance covered (S) by him and his displacement (D)? S = D S > D S < D
  83. Physics

    A bike starts from rest and accelerates to 20 m/s over a period of 6 seconds. What is the acceleration of the car?

    a 1500kg sports car accelerates from 0 to 30 m/s in 8 seconds. Whaat is the power of its engine? Please help
  85. Physics

    what is your power output if you climb a 2m ladder in 10 seconds? suppose your height is 565N.
  86. Physics

    a 100 N chandelier hangs from the ceiling on 8 chains. What is the tension force on each chain?
  87. Physics..PLZ HELP!

    The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is A) 3.0 ƒÎ ~ T. B) 1.5 ~ T. C) 1.5 ~ T. D) 3.0 ~ T. E) 3.0 ~ T.
  88. physics

    a pendulum swing with a speed of 1.5 m/s at its lowest point. How high will it rise before it stops
  89. physics

    A 32 kg girl runs up a flight of stairs that is 30 m high. How much work does this require? Not sure how to even start
  90. physics

    how much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room?
  91. physics

    how high must a 2 kg basketball be thrown so that the top of its arc, it has a potential energy of 160J?
  92. Physics

    How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.0 ìC?
  93. Physics

    What is the circular force of a 150 g yoyo swung around on a 1.00 m string at a velocity of 5.0 m/s (in Newtons)?
  94. physics

    --------------------------------------- A rugby player of mass 82kg is running at 6.0m/s. How much energy will be needed to stop him? ---------------------------------------
  95. Physics

    A ball travels 200cm in the first 2sec and 220cmin the next 5sec. Find the velocity at 7s
  96. physics

    determine the kinetic energy of a boy mass 40kg running with velocity of 3m/s
  97. Physical Conceptual Science

    Trucks often have signs on the back that say, “If you can’t see my mirrors, I can’t see you.” Explain the physics.
  98. physics

    How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.1 µC?
  99. physics

    If a material contains three elements but not joined in a fixed proportion, it is a(an) A. mixture. B. compound. C. atom. D. none of the above D?
  100. physics

    What quantity of energy is represented by 250cm^3 of a gas 100N.m^2 when the temperature is kept constant
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