215,130 results, page 57

  1. physics

    Consider the following specific case of the system described in the example above. Suppose the angle θ is 78.0° and the mass of the ball is 7.00 kg.
  2. Physics

    how much work is needed to stop a 20kg bullet moving with a speed of 150m/s?
  3. physics

    A 1.0kg ball initially at rest rolls down a plane at 35 degrees. pls i really need help
  4. physics

    three point charges-1*10^-6,-2*10^-6,3*10^ kept at corners of an equilateral triangle of side 1m.what is potential at centre
  5. Physics

    A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it?

    how far will a 1000kg car travel in 10 sec if it is accelerated from rest by a force of 5000N
  7. Physics

    Write each number in scientific notation: 1) 15.01 ans. Is it 15.01 x 10 minus to the power of 2?? Am i wrong?
  8. Physics

    A 1.21 kg block slides down a 25.0 m long 25.0° incline at constant velocity. How much work is done by friction?
  9. physics

    A 8.20 cm tall object is placed 30.0 cm in front of a concave mirror with a focal length of 4.20 cm. What is the magnification?
  10. physics

    What is the charge of a bare Magnesium nucleus (no electrons, just the protons and neutrons) in Coulombs?
  11. physics

    A bullet is fired in to s wall losses half of its velocity after penetrsting much further will it penetrate.
  12. physics

    a car accelerates along a straight road from the rest to 90 km/h in 5 s what is the magnitude of its average acceleration
  13. Physics

    What happens to your tongue when you lick an aluminum ice cream scrapper just after it has been used? Does it stick to the scraper? Why?
  14. physics

    Describe an experiment to determine the boiling point of a small quantity of a liquid
  15. physics

    On planet Mars, A pendulum has a length of 4L and period of 5T.what is the acceleration due to gravity ?
  16. Physics urgent

    What is the weight of a 76 kg astronaut on the Moon where the value of 'g' is only 17% the strength of 'g' on the Earth? (Answer should be expressed in N).
  17. physics

    What is the downward force on a ball with a mass of 7.5 x 10^-1 kg thrown in the air due to gravity?
  18. Physics

    What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?
  19. Physics

    A meteoroid is speeding through the atmosphere, traveling east at 19.0 km/s while descending at a rate of 12.9 km/s. What is its speed, in km/s?
  20. Physics

    How can grounding prevent property damage and harm, even death when lightning strikes?
  21. Physics

    Calculate the potential energy of a 5.0 g (0.005 kg) paper airplane 5.0 meters above the ground
  22. physics

    if a bowling ball with a 22 cm diameter is half way submerged in a bucket of water, what is its mass?
  23. Physics

    How much does it cost to operate a 23-W porch light for 24 h if electric energy costs 8¢/kWh?
  24. physics

    determine the energy of a photon radio wave electromagnetic radiation. i know which formula to use 6.64*10^-34 what
  25. Physics

    What is the angular momentum (in J*s) of a mass of 1.45 kg which completes an orbit about a point 23.0 meters away every 5.30 seconds.
  26. College Physics

    What is the work required to move a proton 1 cm along the 7 volt equipotential line?
  27. physics

    Which parameter of a projectile depends on the horizontal as well as the vertical component of velocity of projection?
  28. physics

    A man walks 5.0m due east and then 10.0m N30oE . Find his resultant displacement
  29. physics

    A spaceship has a momentum of 20,000 kg·m/s to the left; its mass is 500 kg. What is the magnitude of its velocity?
  30. physics

    what is the force of gravity on a mass of o.5kg hanging by a string in a beaker of water
  31. physics

    if an object is pushed along a rough horizontal surface and moves at a constant velocity, then...
  32. Physics

    Another pendulum swings to and fro at a regular rate of two times per second. Show that its period is 0.5 s.
  33. physics

    From what height would a compact car have to be dropped to have the same kinetic energy that it has when being driven at 100 km/h?
  34. Physics

    How many joules would be required to raise the temperature of 20g of ice at oC to water at15C?
  35. Physics

    If I dropped a bowling ball from the empyre state building, at what velocity would it descend?
  36. Physics

    coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ?
  37. Physics

    What acceleration will you give to a 24.9 kg box if you push it horizontally with a net force of 82.8 N? __________ m/s2
  38. physics

    How would you find the coefficient of kinetic friction if you're given a weight of 627 N and theta=45 degrees?
  39. physics

    A car traveling at +7.2 m/s accelerates at the rate of 0.65 m/s 2 for an interval of 2.4 s. Find vf . Answer in units of m/s
  40. physics

    A car traveling at +6.3 m/s accelerates at the rate of 0.65 m/s^2 for an interval of 2.2 s. Find vf . Answer in units of m/s
  41. Physics

    Air in a balloon does 25 J of work while absorbing 81 J of heat. What is the change in internal energy?
  42. more physics

    in the equation P= 2m/ ne^2 t what do these symbols mean? p - resistor m - mass of e- n - ?? e - electron charge>?? t - time between collisions??
  43. physics

    how much heat is required to change 400g of ice at -20c into steam at 120c
  44. Physics

    What are some of the safety considerations and technologies used in designing a safe roller coaster ride?
  45. physics

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

    A car starts from rest and accelerates for 6.7 s with an acceleration of 1.6 m/s2 . How far does it travel? Answer in units of m
  47. physics

    Explain the changes in frequency with respect to changes in mass, length tension on sonometer bridge.
  48. physics

    Calculate the total energy of 2.0 kg object moving horizontally at 10 m/s 50meters above the surface.
  49. physics

    a 10-kg bos slides down a frictionless ramp with acceleration 3.6 m/s calculate the weight anlge? f ?
  50. Physics

    What is the instantaneous speed in m/s at the 10 s mark for a car that accelerates at 3 m/s(squared) from a position of rest?
  51. Physics

    A gas initially occupies 4.5L at 350k and 22kPa. How many moles and molecules are present?
  52. physics

    Calculate the period of a ball tied to a string of length 0.3 m making 1.9 revolutions every second.
  53. Physics

    If 9.30 x 10^5 J of energy are transferred to 2.00kg of ice at 0 deg C, what is the final temperature of the system?
  54. physics

    an aluminium sphere of 20cm diameter is heated from 0¡ãc to100¡ãc. what is the change in its volume?
  55. physics

    would someone in a lift feel lighter or heavier as it accelerated upwards? explain your answer.
  56. physics

    if a load 1kg streches a cordby 1.2cm.what is the force constantof the cord?
  57. physics

    How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
  58. physics

    How much work is needed to lift a 400kg engine upward 1.5 meters out of a car?
  59. physics

    Which of :acceleration,age,speed,temperature,and velocity are vector quantities? Are any of them scalars?
  60. physics

    A 2.40- bullet embeds itself in a 1.20- block, which is attached to a spring of force constant 770 .
  61. Physics

    How might the poor fellow stranded in the desert benefit from a pair of Polaroid sunglasses?
  62. physics

    what must be the mass of the log to be lifted up by the hand, if the muscle cross sectional area is 17 cm^2?
  63. Physics

    90.0g of copper (c=390J/kg*oC) at 80.0°C are added to 270g of water at 20.0°C. What is the final temperature of the mixture?
  64. 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?
  65. physics

    a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object
  66. physics

    How much work is needed to stop a 20g bullet moving with speed of 150m/s
  67. physics

    An airplane starts from rest and accelerates at 11.5m/s^2. What is its speed at the end of a 655m runway?
  68. Physics 11U

    can a initial velocity from the average acceleration formula (Aav=Vf-Vf/t) be negative?
  69. physics

    A car starts from rest and accelerates for 6.5 s with an acceleration of 3.6 m/s2. How far does it travel? Answer in units of m
  70. physics

    a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground?
  71. physics

    Can you find the pressure exerted on the floor by the heel if it has an are of 1.50 cm^2 and the woman's mass is 55kg?
  72. Physics

    When dealing with circular motion; a string with the length of .4m is being spun horizontally, is the radius .2m?
  73. Physics

    The electron-volt is _____ than the SI unit for the same physical quantity. a. smaller b. greater
  74. physics

    A wheel has turned through 120 revs in 10 s after starting. find the angular acceleration.
  75. physics

    Estimate the magnitude of the electric field in a cell membrane with a thickness of 8nm
  76. physics

    Which consumes more energy, a 1.5 kW hair dryer used for 10 min or a 10 W night light left on for 19 hr?
  77. Physics

    gazelle traveling 200 m/s is launched at a 40 degree angle with respect to the horizontal.
  78. Physics

    coin and a piece of glass are both heated to 60 degrees celsius which will be warmer when you touch it ?
  79. Physics

    The speed of a train increased from 20 mi/hr to 30 mi/hr in a distance of 500 ft. Calculate the average acceleration in ft/s2
  80. 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?
  81. 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?
  82. 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?
  83. Physics

    Calculate the hang time of an athlete who jumps a vertical distance of 0.75 meter.
  84. Physics 1

    (II) How close to the edge of the 20.0-kg table shown in Fig. 9–47 can a 66.0-kg person sit without tipping it over?
  85. physics(measurement)

    What accurate method can be used to determine the thickness of a coin. Explain pls..
  86. physics

    Why is parallax method not useful for measuring the distances of stars more than 100 light years away?
  87. Physics

    what is a planes velocity if ithas anair speed of 18 and there is a 30 km/h wind blowing south
  88. Physics

    Ok why would it be necessary for someone to measure oscillations from a 20 cm mark of a suspended ruler as oppose to the center of mass?
  89. physics

    the two crates 40-kg and 60-kg are to be accelerated upward to a ship at the rate of 0.30-m/s2 determine the tension in each rope ?
  90. Physics

    What is the tension in a 1-meter string that is spinning a 0.5-kg rock in a horizontal circle 3 times per second?
  91. physics

    Calculate the quantity of heat required to raise the temperature of 2.00 g of water 4.00◦C.
  92. Physics (HELP)

    A real image is usually inverted, but can be upright in special cases. True or false?
  93. physics

    How much heat must be absorbed by a 500 g pot of water in order to raise the temperature from 20„aC to 30„aC?
  94. Physics (HELP)

    The index of refraction of diamond is 2.42. What would be the speed of a light wave passing through a this medium? 8.1 x 10 ^-9 m/s 1.2 x 10^8 m/s 7.3 x 10^8 m/s 9 x 10^-9 m/s
  95. physics

    How much spring elasticity would be needed to make a 50 pound child jump higher
  96. physics

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

    What are the dangers associated with electricity in your home? What can be done to limit or prevent the possibilities of dying or getting hurt?
  98. Physics

    Calculate the force acting on a body of mass 10 kg moving with a uniform velocity of 2m/s.
  99. Physics (HELP)

    An object inside of the focal point of a concave mirror produces an image that is...
  100. Physics

    Charges q1 and q2 lie on x axis at points x= -a and x= 5, respectively. (a) how must q1 and q2 be related for the net force on charge +Q at x = a/2 to be zero ? (b) and if +Q is placed at x = 3a/2.
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