Physics!

74,760 results, page 44
  1. Physics

    Let U=(13i3−i). What is U†? Explicitly indicate multiplication with a * symbol. For instance, you should write 3*i+2 instead of 3i+2.
  2. Physics

    How much energy is stored in the 120 uf capacitor of a defibrillator if the potential across the plates is 4 x 10^3 V?
  3. Physics

    Light travels at a speed 3x10^8 m/s. What distance does it travel in a time of 0.1s?
  4. Physics

    You throw a plate off your roof with a speed of 10.0 m/s. 4.00 seconds later it hits the ground? How far?
  5. physics

    ifv=(3i+4j+5k)m/s is the instantaneous velocity of a body mass 1.50kg calculate its K.E
  6. physics

    a spring has a force constant of 20000 N/m how far must it be strectched for its potential energy to be 43 J??
  7. physics

    if an iron cube of volume 400cm3 is immersed in water,the upthrust will be?
  8. Physics

    a sled is capable of reaching speeds of 450 m/s in 1.82 s then stopped in 1.92 s what is the acceleration
  9. Physics

    Who originally designed the planetary model of an atom? Bohr or Rutherford
  10. mathematical physics

    Solve the following ODE using the power series method (1-x^2)y"-2xy'+2y = 0
  11. physics

    Find d electrostaticforce of a q1 to other charges.express ur answer as magnitude n direction
  12. Physics

    Draw areal velocity versus time graph for Mars.
  13. Physics

    Find the centripetal acceleration of a car that rounds an 80 m radius curve at 10 m/s.
  14. physics

    two objects a and b have the same size but a is heavier than b .they reach the ground at the same time but a has greater______
  15. Physics

    What hanging mass will stretch a 1.9-m-long, 0.54 - diameter steel wire by 1.2 ?
  16. physics

    What would be the orbital speed and period of a satellite in orbit 1.50 ✕ 10^8 m above the Earth?
  17. physics

    How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?
  18. Chemistry and physics

    What causes a red glow when the iron and sulphur mixture is heated?
  19. Physics

    Under what conditions will a 0.0300 kg marble and a 3.00 kg rock have the same gravitational potential energy other than zero
  20. physics

    Calculate the number density of strontium titanate (SrTiO3), ρ = 5.12 g cm -3
  21. Physics

    A photon a. is a quantum of light b. is a wave c. means bundle of energy(I think it's this one)
  22. Science

    Name 3 physical (physics) occurances that happen within a roller coaster ride?
  23. physics

    What is the mass of an object that requires a force of 65N to accelarate it at a rate of 13 m/s2?
  24. physics

    need the formula to find jupiters orbital period in earth years
  25. physics

    find the magnitude and dirction of the resultant force of two perpendicular forces F1=3N and F2=4N
  26. PHYSICS

    What is the force of attraction between two masses 5kg and 8kg at a distance of 60cm apart.
  27. Physics

    the relationship between linear speed and net force is inverse right? can someone explain why to me please.
  28. physics

    Two charged spheres are 18.0 cm apart. They are moved, and the force on each of them is found to have been doubled. How far apart are they now? ______cm
  29. physics

    at what temprature is the average translational k.e of a molecule in an ideal gas equal to 1 ev?
  30. physics

    A 0.355-kg object undergoing SHM has ax = 2.30 m/s2 when x = 0.235 m. What is the time for one oscillation?
  31. Physics

    You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/- 3mm. The area would be A +/- a cm^2. a. What is A? b. What is a?
  32. physics 102

    What are the wavelengths of electromagnetic wave in free space that have the following frequencies? (a) 3.00 10^19 Hz pm (b) 7.50 10^9 Hz cm
  33. physics

    Is the charge on the surface of the earth due to an excess or a deficit of electrons?
  34. physics

    the number of waves of wavelength 6000 angstrom in a path of 2 cm in vacuum are
  35. Physics

    A 74.0 kg firefighter climbs a flight of stairs 12.0 m high. How much work is required?
  36. 9th grade conceptual physics

    How do you find the cargo capacity for a boat?
  37. physics

    a boy drops a mango from a tree it falls without rebound what happens to it's momentum
  38. Physics Ana

    http://www.jiskha.com/display.cgi?id=1258760143
  39. principles of physics

    Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm.
  40. physics

    Find the speed of a sleigh sliding 326 feet in 22 seconds.
  41. Physics

    A car speeds up from 12 m/s to 20 m/s in 6.4s.If its mass is 1200 kg,what force must its engine provide ?
  42. physics

    What is meant by the statement that the specific latent heat of steam is 2260000jkg
  43. Physics

    an elastic band is stretched a distance of 0.150m by a force of 100.0
  44. physics

    What is the length of a box in which the difference between an electron's first and second allowed energies is 1.30×10−19 ?
  45. Physics

    You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/- 3mm. The area would be A +/- a cm^2. a. What is A? b. What is a?
  46. Physics

    What angle should you rotate a mirror so that a reflected ray rotates through 28 degrees. I got 20, but i am not sure, please help
  47. physics

    if you walk for 46 minutes at a speed of0.91 meters per second, how far will you have traveled? convert to km
  48. physics

    lava ball is shot straight up at 28m/s what is speed after 3 seconds
  49. physics

    Calculate the speed of an electron that is accelerated through the potential difference of 123 V.
  50. physics 11

    By how much would 1200 W kettle, which is 72% efficient raise the temperature of 0.60 kg of water in 3.0 min?
  51. physics

    How much work is done in lifting a 300 Newton rock 10 meters from the ground?
  52. Physics

    A mango is dropped and falls freely from rest what are its position and velocity after 1.0s,2.0s, and 3.0s
  53. physics

    An electron travels 7.63 m in 7.33 × 10−8 s. How fast does it travel? Answer in units of cm/s
  54. physics

    What is the concentration (in g/100ml ) of a solution which has 2,8g of NaCI dissolved into 88.0ml of water?
  55. Physics

    Acoustics. How do engineers design buildings to reduce noise pollution?
  56. Physics

    What is the resistance of a 4.00 m length of copper wire having a diameter of 2.00 mm at a temperature of 20 degrees?
  57. Physics

    Under what conditions would an applied force increase the Kinetic energy of an object?
  58. Physics

    An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping?
  59. Physics

    Calculate the gravitational force between two identical 100-kg masses separated by 1 m.
  60. Physics

    i need help with a very VERY long problem. its about speed and distance. will post question when someone is interested to help! :]
  61. Physics

    An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping?
  62. Physics

    A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
  63. Physics

    What are the components of a vector of magnitude 1.5 m at an angle of 35 degrees from the positive x-axis?
  64. physics

    A spring has a force constant of 70000 N/m. How far must it be stretched for its potential energy to be 21 J?
  65. Physics

    A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
  66. Physics

    A mass of 100 gram is fallen down,which will be the kinetic energy after 5 second of its fall?
  67. Physics

    Have no idea how to do this! Determine the weight of a 1768.0-kg car which is moving at a speed of 26 m/s.
  68. physics

    a suitcase weighs 30 kg wt.everytime i weigh it on a spring balance,the reading is different.WHY?
  69. Physics

    A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
  70. Physics

    Runners in the 100-m dash use starting blocks. Explain what this device does. PLEASE HELP.
  71. Physics

    A 1400-kg race car can go from 0 to 90km/h in 6.0s . What average power is required to do this?
  72. Physics

    What takes more energy to raise its temperature by one degree, water or ice? Thanks!
  73. PHYSICS

    A hypothetical planet has a mass 1.55 times that of Earth, but the same radius. What is g near its surface?
  74. Physics

    What is the wavelength of visible light emit- ted at 4.2 × 108 MHz?
  75. physics

    A trolley while going down an inclined plane has an acceleration of 2 cm/s2.What will be the velocity 3 secs after its start?
  76. physics

    Determine the net force necessary to give an object with a mass of 1.8 kg an acceleration of 5.7 m/s2.
  77. physics

    What is the wavelength of the higher frequency limit (18 megahertz) in dry air at 0 C?
  78. physics

    what will happen to the bone structure if earth becomes more dense than its actual density?
  79. physics

    What is the mass of an object that requires a force of 65N to accelerate it at a rate of 13 m/s2?
  80. Physics

    what is the power dissipated in an ac circit in which current v=230sin(wt+90) and I=10sin(wt)...plz help me
  81. Physics 112

    Two point charges, +3.18 µC and -6.40 µC, are separated by 1.32 m. What is the electric potential midway between them?
  82. Physics/chemistry

    Describe the partcle Theory of a HOt air Balloon?
  83. physics

    Can a metal sphere of radius 1cm hold a charge of 1coloumb
  84. physics

    How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
  85. physics

    How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
  86. Physics

    What is the fundamental frequency on a 5 m rope that is tied at both ends if the speed of the waves is 24 m/s?
  87. physics

    If,an,object,is,at,rest,there,must,be,no,force,acting,on,it.Is,this,statement,correct?,Explain!
  88. Physics

    How much work does a weightlifter do on a 450 N barbell thathe lifts 2m into the air
  89. physics

    I can't fully understand Fermat's principle of least time (the modern version)
  90. physics

    determine the pressure of a 20 lb force is applied to an area of 10 inch squared
  91. physics

    A storage tank of negligible mass and 30 m high is filled with gasoline
  92. physics

    At what speed should an object be projected to reach the maximum range of 200 m ?
  93. physics

    determine the pressure of a 20 lb force is applied to an area of 10 inch squared
  94. physics

    what is the displacement of the ball? i.imgur. com/8ljWh . png i don't know calculus!
  95. physics

    if a force of 3000 n can move a crate at an acceleration of 10 m/s2, what is the mass of the object
  96. Physics

    Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary.
  97. Physics

    Two vectors A. and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B?
  98. physics repost

    Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N
  99. Physics

    Two vectors A and B have magnitude A = 3.00 and B = 3.00. Their vector product is A x B= -5.00k + 2.00i. What is the angle between A and B?
  100. physics

    A man weighs 750.0 N on Earth at what altitude will he weigh 187.5 N?