215,554 results, page 46
  1. Physics

    Whatis the volume of a piece of iron (p= 7.9g/ cm cubed) that has a mass of 0.50kg?
  2. physics

    Why is it vital that there is friction thatb opposes motion when two surfaces try to slide across one another?
  3. Physics

    What is the size of the buoyant force on a 31.0 N ball that is floating in fresh water?
  4. physics

    what is the work done in moving a positive charge 12UC across two points 6cm apart
  5. physics

    Liquids exert pressure at Right Angles to the surface of container.Please explain this with an example
  6. physics

    A 5.0-g CD with a radius of 6.0 cm rotates with an angular speed of 20 rad/s. What is its kinetic energy?
  7. physics

    How far apart must two protons be if the electrical force of repulsion acting on either one is equal to its weight.
  8. Physics

    If a shoe is dropped from a height of 40m, what is its speed after falling for two seconds?
  9. physics

    A 5.0-g CD with a radius of 6.0 cm rotates with an angular speed of 20 rad/s. What is its kinetic energy?
  10. physics

    explain why a child on a swing comes to rest directly below the top of the swinng
  11. physics

    If a nuclide has a decay constant of 10^-6 s-1 what is its half life ??? I think it is 0.693 / 10^-6 = 693000 or 6.93 x 10^5 Is this right ...
  12. physics

    a horse walks 56 meters in 75 second. what is his average velocity?show the work
  13. physics

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

    what 2 properties of carbon make it a good material to use for motor brushes?
  15. physics

    How much work in joules must be done to stop a 5000 kg car traveling at 120 km/hr?

    A hypothetical planet has a mass 1.49 times that of Earth, but the same radius. What is g near its surface?
  17. physics

    How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 2 106 m/s?
  18. physics

    find the moment of inertia of the earth. Radius is 6,000 km and mass is 6 x 10^24 kg
  19. physics

    which of acceleration age speed temperature and velocity are vector quantities
  20. physics

    A bus that is traveling at 31.0 km/h, speeds up at a constant rate of 3.7 m/s2. What velocity does it reach 6.8 s later?
  21. physics

    A particle at rest undergoes an acceleration of 2.9 m/s2 to the right and 2.6 m/s2 up. What is its speed after 5.3 s? Answer in units of m/s
  22. 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?
  23. physics

    why are the lengths of days in spring and autumn the same? if the sun does not set, why is it so cold?
  24. physics

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

    need the formula to find jupiters orbital period in earth years
  26. Physics

    Explain how you would determine how much error there is between a vector addition and the real results.
  27. Physics

    Determine the escape velocity at a location 2.5*10^4km from the surface of Jupiter
  28. physics

    if you jump upward with a speed of 2mls, how long will it take before you stop rising?
  29. Physics 30

    A frictionless pulley (a 2.0 kg is on the floor while the 3.0 kg is 0.5m high) . when released, momentum of the 2kg is?
  30. Physics

    A 125 ball has a kinetic energy 33.6 What is the magnitude of it's momentum? What is the speed?

    A car speeds up at 5m/s if the driver was already moving at 7m/s find his velocity after 3 seconds
  32. Physics

    1) Please describe the typical path(s) for hurricanes. Is this part of the pattern of convection?
  33. Physics

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

    A 0.255kg rock is thrown with a speed of 12.0m/s.How much energy does it initally passess?
  35. physics

    define the term parallax anf and state 2 ways of reducing it
  36. physics

    into which part of the fridge-freezer will the rate of heat transfer be greater?
  37. physics

    Two insulating spheres with charges of -7.0 μC and -12 μC, are located 10.0 cm apart. What is the force between them? In what direction does it act?
  38. physics

    What must be the magnitude of the force of static friction between the surface and the bottom of the crate?
  39. Physics

    1.A Speed Of A Bullet Of Mass 20g Is 200km/h. What Is The Kinectic Energy.
  40. physics

    what is the average velocity of a vehicle that uniformly accelerates from rest to 38 fps?
  41. 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
  42. physics

    5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.
  43. physics

    What voltage is applied to the 5.00 µF capacitor of a heart defibrillator that stores 35.0 J of energy? In kv.
  44. physics

    To the nearest tenth of a Joule, what is the total energy of the pendulum in problem 2?
  45. physics

    How much heat is absorbed by an electric refrigerator in charging 2 Kg of water at 15°C to ice at 0°C?
  46. physics

    what is the relationship between independent and dependent variables in the experiment of snell's law
  47. Physics

    Describe how you can determine the specific heat of an unknown metal whose mass is known.
  48. physics

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

    what is the schwarzschild radius of a black hole with a mass of 1.68x10^43kg
  50. Physics

    How much energy (in cal) is required to raise the temperature of 15.0g of isopropyl alcohol from 10.0 C to 25.0 C?
  51. Physics

    I've read all my resource materials and looked for outside resources already and i can't find an equation for this. I would appreciate any help
  52. physics

    find time it takes for a sprinter to accelerate from rest to 10 m/s. If acceleration is 4.0 m/s sq.
  53. Physics

    A 74.0 kg firefighter climbs a flight of stairs 12.0 m high. How much work is required?
  54. Physics

    calculate K.E in Joules of a baseball w/ a mass of 237.2 cg moving at 85.00 mph
  55. Physics

    Describe how surface area and volume are related in solids? Give an example.
  56. 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 ?
  57. physics

    If the slope in the above problem is 48 degrees, what is the coefficent of friction (to 2 decimal places)?
  58. physics

    what is the gravitational potential of a 2kg book that is on a shelf 2 meters off the ground?
  59. physics

    What is the effect of increasing the inclination of the track to the acceleration of the rider in the experiment?
  60. Physics

    What’s the specific heat of a material if it takes 6.5 kJ to increase the temperature of a 1.8 kg sample by 6.4 ∘C ?
  61. physics

    determine the magnitude of the centripetal force that acted on the whirling ball??
  62. Physics

    The period of revolution of a satellite is 90min. What is the altitude above the surface of the earth?
  63. physics

    find the acceleration produced by a net force of 300.0 N on a mass of 0.75 kg.
  64. agric,physics,life sciences ,pure maths

    can i be an agricultural engineer

    At what angle should you launch a projectile from the ground so that it has the greatest time of flight?
  66. physics

    a particle which has zero rest mass and non zero energy and momentum must travel with a speed?
  67. physics

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

    You throw a ball straight up at 25 m/s. How many seconds elapse before it is traveling downward at 13 m/s?
  69. physics

    How much heat is needed to raise the temperature of 2kg of water to 10K?
  70. Physics

    If a ball were to fall off a 180cm table,how fast would it be going halfway to the ground?
  71. Physics

    How long is Mayra, a ballerina, in the air when she leaps straight up with a speed of 1.23 m/s?
  72. physics

    The sensitivity of a galvanometer of resistance 990ohm is increased by 10 times.The shunt used is??
  73. 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?
  74. 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?
  75. physics

    how do you find the magnitude of the net force if you have 2 forces acting on an object: 8.4 N[S] and 7.5 N[E]
  76. physics

    A gas occupies 20 dm³at 30°c at 2.5 atm find its volume ayt s.t.p.
  77. Physics

    If a car accelerates from rest to 15 m/s for a distance of 200 m. What is the magnitude of acceleration?
  78. physics

    How much heat does 25g aluminum give off as it cools from 95celsius to 30celsius?
  79. physics

    What would the gravitational potential energy be if the bucket were raised six times as high?
  80. physics

    What is the electric field intensity of a point 15cm from a charge 15microcoulomb
  81. Science: Physics

    A circle graph has labeled segments of 5.7%, 21%, 13, and 6%. What % does the unlabeled segment have?
  82. physics

    In a CD, the characteristic that is given in binary is the wave of which of the following? A) amplitude B) None of these.C) quality.D) speed.E) frequency.
  83. physics

    A projectile is given an initial velocity of (i + 2j) m/s, where i is along the ground and j is along the vertical. If g = 10 m/s2, the equation of its trajectory is:
  84. physics

    How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A? 1 C
  85. Physics

    Does the velocity of a model rocket increase or decrease when the parachute is deployed?
  86. Physical Science

    What are three medical technologies that rely on the physics of elementary particles?
  87. Physics

    Find the attractive force bet a 50 kg girl and a 60 kg boy, if they stand 2.00 m apart.
  88. physics

    the minute hand of a large clock is 2 m long. what is its mean angular speed?
  89. physics

    find the impulse on a baqseball that is hit 80N of force in a time of 0.52 s
  90. Physics

    How do I find tangential speed with just radius, time and angular acceleration?
  91. Physics pls help

    At what depth in water is the pressure equal to 2m atmosphere. Explain how
  92. physics

    if r1=2ohms, r2=4ohms, r3=6ohms. Then what is the voltmer reading connected in series
  93. Physics

    I need to explain and demonstrate mathematically why it is easier to pull a wheelbarrow than it is to push it
  94. Physics

    A person with a mass of 85kg. How much in newtons do they weigh on the earth and the moon?
  95. physics

    a 1200 kg car goes from 15m/s in 16s. What is the average force acting on it?
  96. physics

    Fall time under g is sqrt 2h/g. Can someone give a derivation from the equations of motion please? Thanks.
  97. physics

    A carton of juice remains intact even after you have sucked out all the drink from it. please explain
  98. physics

    explain examples of physical laws used during the Apollo 13 mission to get it home
  99. physics

    What is the wavelength of an X-ray photon with energy 6.0 (6000 )? (Hint: 1 = 1.60 10-19 joule.)?
  100. physics

    what is the wavelength of an X- ray photon with energy 10 keV?(10,000eV)? what is the frequency?