1. Physics

    ) What is the minimum uncertainty in the velocity of an electron that is known to be somewhere between 0.050 nm and 0.10 nm from a proton?
  2. physics

    a car is moving at 40km per hour what is the velocity in meters per second?
  3. Physics

    In the photoelectric effect, what determines the number of ejected electrons?
  4. physics

    Find the number of atoms in a gold ring of mass 6.43 g.
  5. physics

    Find the mass in grams of a carbon dioxide molecule.
  6. AP physics

    A car travels 35 km west and 75 km north. what distance did it travel?
  7. Physics

    How much energy is released when 250 kg of anthracite coal burns
  8. physics

    why is the color of the sky orange during sunrise and sunset? --pls help me on here-- thanks :)
  9. physics

    The distance between two planets is 1.6 x 10^6 m. How much time would the light signal take to go from one planet to the other?
  10. physics

    A fully loaded 737 aircraft takes off at 250 {\rm km/h}.
  11. Physics

    An electron and a proton are traveling at the same speed. Which one has the longer wavelength?
  12. physics

    how can you say that thickness of a material varies as it is a constant value. discuss with in 50 words.
  13. physics

    How much charge flows through a 12 V battery when a 2 ìC capacitor is connected across its terminal?
  14. physics

    show that none of the principal moments of inertia can exceed the sum of the other two Please help me thank you
  15. physics

    How long does it take a 25 kW steam engine to do 5.6 × 10^7J of work? Answer in units of s
  16. physics

    What is the rotational speed of the hour hand on a clock? -----rev/s
  17. physics

    A stone is dropped from a height of 4.5m.What will be the distance travelled by it during the last second of its fall?
  18. physics

    A nail is dropped from a height of 400m. How long does it take to land?
  19. physics

    state pascal's principle of transmission of pressure in liquids
  20. physics

    A car accelerates from rest at 7.9 m/s2. How much time does it need to attain a speed of 5 m/s?
  21. physics

    What is the rotational speed of the hour hand on a clock? -----rev/s
  22. physics

    A 5kg mass was lifted 365cm, how much work was done against gravity?
  23. physics

    explain why we sweat when it is hot? How does it help us? In terms of heat and temperature what happens
  24. physics

    You drive a car 7 h at 42 km/h, then 7 h at 65 km/h. what is your average velocity? answer in units of km/h
  25. physics (Science)

    If a bee flew 27 centimeters in 10 seconds what would its speed be?
  26. physics

    A mass accelerate uniformly when the resultant force acting on it is what?
  27. Physics

    2 factors that increase static friction? Could it be weight or the ground?
  28. Physics

    A car accelerates from rest to 90km/h in 10 seconds.What is its acceleration in m/s2?
  29. physics

    Find the resultant of two vectors 7N and 8N inclined at an angle of 65 degree to each other
  30. PHYSICS

    Determine the equivalent capacitance between A and B for the group of capacitors in the drawing. Let C1 = 12 µF and C2 = 4.0 µF.
  31. physics

    calculate the distance co verb for an object of mass20kg and force600n
  32. physics

    all electric charges are multiples of the charge on an electron, or atom?
  33. physics

    Two positive charges of 12 µC and 8 µC respectively are 10 cm apart. Find the work done in bringing them 4 cm closer, so that, they are 6 cm apart..
  34. physics

    Two charged spheres are 8.00 apart. They are moved, and the force on each of them is found to have been tripled
  35. physics

    what is the kinetic energy of a bear with a mass of 65 Kg and running at a speed of 20 m/s ?
  36. physics

    What force is required to accelerate a 90kg bike to 20 m/s in 15 sec? I need to know HOW to do it!
  37. physics

    With acceleration of 2500 m/s2, how long will it take to rreach speed of light
  38. physics

    A 84.0 kg person is being pulled away from a burning building as shown in the figure below.
  39. physics

    Essay on how accleration due to gravity is used to benefit mankind
  40. physics

    does the flame of gas stove emit light?explain
  41. physics

    What forces are acting on a puck that is on an air hockey table?
  42. Physics

    Calculate the de Broglie wavelength of a proton moving at 5.50x10^5 m/s.
  43. physics

    How much time is required for sound to travel 1.4 km through air if the temperature is 30.0 c
  44. physics

    With acceleration of 2500 m/s2, how long will it take to rreach speed of light
  45. physics

    What force is required to accelerate a 90kg bike to 20 m/s in 15 sec? I need to know HOW to do it!
  46. physics

    need help can someone please tell me Electricity is often converted into other forms of energy. List 3 examples.
  47. physics

    A force of 1.3N results in the movement of an object 3.1m northeast.How much work is done
  48. Physics

    What will be the final temperature if 1.9 x 10^2 kJ of heat is added to 0.5 kg of ice at 0 deg. C?
  49. Physics

    What are some common examples of light refraction, excluding rainbows?
  50. Physics 102

    What would be the path of the Moon if somehow all gravitational forces on it vanished to zero?
  51. Physics

    What is the frequency of an electromagnetic wave if it has a wavelength of 1.4 km? The speed of light is 3 × 10 8 m
  52. physics

    assign units and determine net forces in a situation.
  53. physics

    What is the kinetic energy of a 62kg cyclist if she is moving on her bicycle at 8.2 m/s?
  54. physics

    7/8 part of a substance decays in 45 days what is its half life
  55. Physics

    If the speed of the wave is 330 per sec calculate the wavelength
  56. physics

    Calculate the speed of a 10,000 kg airliner with a kinetic energy of 3.1 x 10^9 J.
  57. physics

    what 2 factors determine the size of the force of gravity? & what is the relationship between them?
  58. Physics

    If a force of 15kg. wt acts on a mass of 14 kg, what will be its velocity after 8 seconds?
  59. Physics

    What is the latent heat of fusion of ice to water? Help pls!!!!!
  60. physics

    What voltage is required to run a 45 W light bulb if the current is 0.5 A?
  61. physics

    claculate the force of gravity between two identical balls 8kg each, if they are 5m apart?
  62. Physics

    Explanation of twin paradox in regards to special relativity theory.
  63. physics

    the number of degrees of freedom for a rigid diatomic molecule is ------------
  64. Physics

    Two objects are moving about so that their total momentum is zero. What can be said about their kinetic energy?
  65. Physics

    How much energy is deposited in the body of a 78 kg adult exposed to a 2.9 Gy dose? Please and thank you.
  66. Physics

    briefly explain why can it be dangerous to touch a charged capacitor?
  67. physics

    What is the minimum speed required to simulate artificial gravity?
  68. Physics

    calculate the force between two identical charges of 1.0 x 10 exp -9 C separated by 1.0 Cm
  69. Physics

    How far apart are a proton and electron if they experience an electric force of 5.10N?
  70. physics

    Calculate the speed of a 10,000 kg airliner with a kinetic energy of 3.1 x 10^9 J.
  71. physics

    What is its velocity when it returns to the level from which it started? Answer in units of m/s
  72. physics

    why would you wear a white t shirt opposed to a blak one in winter
  73. Physics HW Help, Please

    What is the energy required to accelerate a 1600 kg car from rest to 33 m/s?
  74. physics

    what is the pressure on the bottom of an aquarium 0.3 m deep filled with water
  75. physics

    what is the frequency of a citizen's band (CB) radio which has a wavelength of 11.5 meters ?
  76. physics

    claculate the force of gravity between two identical balls 8kg each, if they are 5m apart?
  77. physics

    if 8.96dm of CO is produced at STP -how many moles of CaCO3 have reacted
  78. physics

    Determine the tangential speed of a point .4 m from the center of the wheel?
  79. physics 12

    a 1kg satellite has an orbital period of 4 hours. what's the altitude?
  80. Intro Physics

    An EM wave has a wavelength of 620 nm. What is its frequency? How would we classify it?
  81. Physics

    A mass accelerates uniformly when the resultant force acting on it is......?
  82. Physics

    the energy of a ball rolling up an inclined place plane is?
  83. physics

    What is the repulsive force between two pith balls that are 12.0 cm apart and have equal charges of -39.0 nC?
  84. physics

    At a distance of 2.0 m. from a +8.0 x 10^-6 C charge, the magnitude and direction of the electric field will be?
  85. physics

    why one cannot find the north pole of the earth using only a simple compass
  86. physics

    How much heat is added to 10.5 g of ice at -20.0°C to convert it to steam at 123.5°C?
  87. physics

    Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.
  88. physics

    describe how the values of resisitivity determine the uses of material in industry ???
  89. Physics

    What is the speed of a wave whose frequency is 9.00Hz and wavelength is 0.654m?
  90. gr.10 physics

    could someone please help me with this? Rearrange and simplify for r when A=3.14r^2 by the way, 3.14 is supposed to be pi, but i don't know how to write it...
  91. physics

    The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above.
  92. physics

    A 31-m/s velocity vector that makes an angle of 44° counterclockwise from the -x direction. x: y:
  93. physics

    How do you know what element is chemically active on the periodic table? PLS HELP
  94. Physics

    Calculate the resultant force of 5N and 5N ac ting at an angle 90 degree
  95. physics - help !!!!!!!!

    The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above. Thank you
  96. physics

    Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.
  97. Physics

    A car weighing 9800 N moves around a circular track of 70 m in 60 s. (a)
  98. physics

    A skier slides down a slope to the left at a constant speed.
  99. Physics

    how does the MA and the IMA of the inclined plane vary with the inclination angle?
  100. Physics

    17. Explain how water can transfer energy by conduction and by convection.