1. physics

    How much work must be done to stop a 1070 kg car traveling at 111 km/h?
  2. physics

    Mass of a block is 3.9 kg and volume is 0.0005 m. Find density in g/cm
  3. Physics

    How to add vectors in terms of velocity by using vector chart
  4. physics

    describe the death of a massive star (10 solar masses)
  5. Physics

    If light in air is incident at 20°, at what angle is it refracted in glass?
  6. physics

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

    how do types of nuclear radiation differ in electric charge?
  8. Physics

    what maximizes our ability to recover elastic potential energy?
  9. Science

    What is the formula used for finding the gravitational pull of a particular mass in physics?
  10. physics

    Name two factors that dertermine the quality/timbre of a musical note.
  11. University, Physics

    Derive the error in equation: T1/2 = 1n(2)/lambda solve for T
  12. Physics

    Why use remote sensing for obtaining information about areas or objects?
  13. physics

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

    40 g of gasoline are mixed with 45 g of water. What is the average density of the mixture?
  15. physics

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

    what must be the minimum velocity of a missile if it is strike a target a 100m away?
  17. PHYSICS

    If that charge is 3.7 μC , by what percentage does the mass of a 31 g comb change during charging?
  18. science[physics]

    why is the pressure more on ground when a person is walking than when he is standing ?
  19. physics

    Discribe the phase change that took place in the solid between the time t1 and t2?
  20. Physics

    The problem contains graphics that I don't know how to show other than in an image format: h t t p : / / b i t . l y / c D H P V M h t t p : / / b i t . l y / 9 m b y C R
  21. Physics

    A and B are vectors in the same plane. If A= 8i+6j. Find the vector B such that |A+B| = 14.14 units and A is perpendicular to B.
  22. physics

    according to the statement given what is the magnitude of the velocity of the rock just before it strikes the ground
  23. Physics

    Find the modulus direction cosin unit vector 1) 4a-2b+3c (2) a-7b+5c (3)4a-3b+c
  24. physics

    Consider a concave mirror with radius R. An upright object is placed in between the interval R/2 and R. R
  25. physics

    Why air pressure in a car tyre increases during driving?
  26. physics

    As the wavelength of a wave in a uniform medium increases, its speed will ?
  27. Physics

    the force required to accelerate a mass of 10.0kg at 4.00m/s^2 is
  28. physics

    why is machinery not 100% efficient Friction, heat loss
  29. physics

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

    What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 µC and a = 2.50? (The positive direction is to the right.)
  31. physics

    An electron travels 1.91 m in 4.72x10^-8s. How fast does it travel? Answer in cm/s
  32. physics

    What is the acceleration of a 0.30 kg volleyball when a player uses a force of 93 N to spike the ball?
  33. 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
  34. Physics

    What is the force on the charge located at x = +8.00 cm in Figure 17.40(a) given that q = 5.00 µC and a = 2.50? (The positive direction is to the right.)
  35. Physics

    find the x- and y- component of vector R which has a length of 13cm at 30.0 degrees
  36. physics-14

    If room temperature is 70 degrees farenheit,what is kelvin?____
  37. physics

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

    What is the energy released in the fusion reaction: 2H+2H--> 4He + Q? How do I calculate this?
  39. Physics

    Find the length of a simple pendulum that completes 17.0 oscillations in 35.0 s.
  40. Physics

    What is the scientific principle involved in unmanned level crossing?
  41. Physics

    What is the scientific principle involved in unmanned level crossing?
  42. physics

    How much work does gravity do on a 0.120-kg ball falling from a height of 17.0 m?
  43. physics

    A bicyclist is traveling at 19.3 km/h when he speeds up with a constant acceleration of 0.67 m/s2. What is his velocity after 5.00 s?
  44. physics

    Calculate the angular velocity of the minute hand of a clock.
  45. Physics

    Explain why the pressure at depth h in a stationary fluid is `rho g h.
  46. physics

    How long does it take the horse to cover the first 35.0 m of the race? acceleration is 3.00m/s^2
  47. PHYSICS

    A bicycle tire is 68 cm in diameter. what frequency does it have if it travels at 8m/ sec?
  48. physics

    calculate the electrostatic force between charges of -2.4 µC and +5.3 µC, placed 58cm apart in a vaccum.
  49. physics

    exercise 4.1 suppose the pilot start agin from rest
  50. physics

    Please show me how to derive the relativist mass formula: m = m0 / sqrt(1 - v^2/c^2)?
  51. physics

    Two point charges, +4.00 ìC and -7.00 ìC, are separated by 2.20 m. What is the electric potential midway between them?
  52. Physics

    Find out the resultant of two forces of 4N and 7N acting at an angle of 140°
  53. physics

    Find x- and y-components of the vector \vec {v}=(2.0cm/s , - x-direction).
  54. Physics

    Explain why a balloon expands when heated and contracts when cooled.
  55. Physics

    With speed 75m/s and period 5.42ms, calculate the wavelength.
  56. physics

    What,is,the,weight,of,150lb,person,in,newtons?,What,is,his,mass,in,kilograms?
  57. Physics

    Explanation of twin paradox in regards to special relativity theory.
  58. Physics

    If a clock says 10:30 am and the second hand rotates 960 degrees what time would it be?
  59. physics

    What.is.the.weight.of.a.150.lb.person.in.newtons?.what.is.his.mass.in.kilograms?
  60. physics

    Explain why the pressure at depth h in a stationary fluid is `rho g h.
  61. Physics

    How do the initial and final horizontal velocities of a projectile compare?
  62. physics

    What is the value of the gravitational acceleration at a height of 2000 km above the surface of the Earth?
  63. physics

    what speed must you toss a ball straight up so it takes 2s to return to you
  64. physics

    an apple weighs about 1N. what is its mass in kilograms ? what is its weight in pounds?
  65. Physics

    the higher the angle the longer an objecg will be in the air , but dose that mean it will go further ?
  66. Physics

    14. Which of the following wavelengths will produce standing waves on a string that is 3.5 m long? a. 1.75 m b. 3.5 m c. 5.0 m d. 7.0 m
  67. physics

    Any object that moves through the air (or space) under the influence of gravity is...?
  68. Physics

    Could someone explain to me about how live, earth and neutral wires work?
  69. Physics

    A proton is at the origin and an electron is at the point x = 0.36nm , y= 0.30nm .
  70. physics

    how many RPM are required to attain 1g with a radius of 840 feet
  71. physics

    Why the blood pressre in human greater at the feet than in the brain?
  72. Physics

    What is the energy (in eV ) of a photon of visible light that has a wavelength of 500 nm ?
  73. physics

    Why does a 10 gram bullet have more momentum traveling at 200m/s than at 20m/s?
  74. physics

    of the following the largest quantity is a] 0.047 cm b] 47x10-4 cm c] 4.7x 10-4 cm d] 0.00047x10^2 cm e] 0.000047x10^6 cm
  75. Physics

    You carry a 20 n box 5 m horizontally across a room. The work you do is? Is 4 J correct?
  76. physics

    How much kinetic energy does a 0.03 kg bullet traveling at a speed of 300 m/s have?
  77. physics

    what is the mass of a playset that is moved with 580n of force for 11 seconds at 1.5 m/s?
  78. Physics

    How do you determine the average velocity on a position-time graph?
  79. physics

    A 12 V battery will increase the potential energy of 2.1 C of charge by how many joules?
  80. physics

    How does a vaccum flask minimize heat change with surrounding
  81. physics

    Why the mesaure of the sphere doesn't play a part at the pendulum???
  82. physics

    How much work must be done to stop a 1040 kg car traveling at 111 km/h?
  83. physics

    What kind of motion makes the pendulum when the amplitudes are small ????
  84. Physics

    The speed of an electron is known to be between 3.0×10^6 m/s and 3.3×10^6 m/s . Estimate the uncertainty in its position. Change in X = ? M
  85. physics

    If jon has a weight of 645N what is his mass? I have to do this using the GUESS METHOD
  86. physics

    If pressure is given by P=A+B by t and -c by D +v where t and v are time and velocity respectively then find dimensional formula of A, B,C&D.
  87. Physics

    What is the electric force of attraction between charges of 3 C and -4 C separated by a distance of 2 m?
  88. physics

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

    joe weighs 650N. how much work does he do if he climbs 4m up a a rope?
  90. Physics

    When is your weight normal, higher, or lower while moving up and down in an elevator?
  91. Physics

    Calculate the acceleration of a plane when it changes its speed from 0m/s to 250m/s in 12 seconds
  92. physics

    what is the speed of 1kg object when the kinetic energy is 1 joule
  93. physics

    if velocity vector is changing but speed is constant, can there still be work
  94. mathematical physics

    Obtain all the first and second order partial derivatives of the function: f( x, y ) = In(I+xy^2)
  95. physics

    which is more work pushing with 115N over 15 m or lifting 20N 10meters
  96. physics

    If the speed of an object is doubled its kinetic energy is multiplied by
  97. Gr 11 Physics Optics Unit

    Explain why a virtual image must always be upright.
  98. physics

    A particle at rest undergoes an acceleration of 2.5 m/s^2 to the right and 3.2 m/s^2 up. What is its speed after 5.9s? Answer in m/s
  99. physics

    Why is more impulse delivered during a collision when bouncing occurs than during one when it doesn't?
  100. physics

    How do I find the magnitude from this data: theta_1 = 44.9 theta_2 = 146.1 A = 4.8 cm B = 8.7 cm
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