physics please HELP !

74,641 results, page 54

  1. General Physics I

    What is the spring constant of a 129N object the vibrates at a period of 4.98s?
  2. Physics

    Find the mass of an object with the acceleration 15m/s^2 when an unbalanced force of 90.0N acts on it
  3. Physics "scientists"

    * JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
  4. Physics

    Calculate the force acting on a body of mass 10 kg moving with a uniform velocity of 2m/s.
  5. physics

    If you move 10 km North, 10 km East, and 10 km South, a) What is your displacement? b) What is the total distance you traveled?
  6. physics

    What will be the magnitude of work if a force of 25N pulls a stone through distance of 5m in its direction ?
  7. physics

    What airspeed would a plane have to travel to have a groundspeed of 320 km/h [S] if there is a 50.0 km/h wind coming from the northwest?
  8. physics

    A jet travels at 434 m/s. How long does it take to travel 294 m? Answer in units of s
  9. physics

    What type of contamination involves Rags, tie wraps, and safety wire?
  10. physics

    A car has a velocity of 25m and accelerates uniformly to 45m/s in 10seconds.what is the acceleration?
  11. physics

    find the apparent weight of a 18 cm by 12 cm by 6 cm block of concrete with a mass of 1.82 kg that is submerged under water.
  12. Physics

    What is the mass of water that has its temperature raised from 27°C to 32°C when it is heated by 5.0 x 106 J of heat energy?
  13. Physics

    So if mgh=1/2mv^2 and I'm solving for v is my answer going to be v= squareroot of 2* (gravity) 9.8m/s^2* (height) 3.67m?
  14. Physics

    Calculate the distance between the two proton such that the electrical repulsive force between them is equal to the weight of either
  15. Physics

    i cant get this right. what is the measured resistance of a 1000ohm, 500ohm and a 100 ohm resistor. and there % error
  16. physics

    what is the initial velocity (Vyo) of a projectile launched horizontally? why? i know that it is 0 m/s, but i don't know why/how to explain it.
  17. physics

    why is it that whn water has been boiled so much it reaches a point when it stops producin bubles?
  18. physics

    how do we calculate the height of a falling ball with a mass of 0.5kg and a velocity of 10m/s.
  19. physics

    c). at what speed does it hit the ground? d). what total length of time is the ball in the air
  20. Physics

    A cooking pot contains 0.8kg of water at 100degree celcius what is the specific heat
  21. physics

    What is the force of gravity between two 832 kg cars separated by a distance of 29.35 m on an interstate highway?
  22. physics

    Describe in detail an experiment to find out the half life of a radioactive material
  23. physics.

    When temperature changes during the day, which scale, Celsius or Fahrenheit, will read a smaller change? and why?
  24. Math/Physics

    For a velocity-time graph, what does the "tangent line of the curve" represent?
  25. physics

    A hockey puck has no friction on it. It has a mass of 0.28 kg and experiences a force of 48 newtons. What is its acceleration?
  26. Physics

    What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?
  27. Physics

    What is the age in years of a bone in which the ratio 14C/ 12C is measured to be 2.3×10^−13?
  28. physics

    what force is necessary to stop a 20 g bullet moving at 200 m/s as it penetrates a wood at a distance of 4 m?
  29. physics

    2 balss,one of iron and the other of aluminium,will experience the same upthrust, when dipped in water when both have equal what?
  30. physics

    a baseboard heater draws a current of 10.0A. How much charge passes through it in a time of 30 min?
  31. physics

    What’s the direction of the electric field caused at the point (–2, 3) by an electron located at the origin?
  32. physics

    What’s the direction of the electric field caused at the point (–2, 3) by an electron located at the origin?
  33. Physics

    How long does it take to deliver 315 J of energy to 0.850 cm^2 of a wall that it hits perpendicularly?
  34. physics

    Why will a magnet attract an ordinary nail or paper clips but not a wooden pencil?
  35. Physics

    Calculate the power of a hair dryer that operates on 120V and draws a current of 10 A.
  36. physics

    You can paddle at 4.5 km/h and the river is flowing at 3 km/h. How far downstream will you be in 44 min? Answer in units of km
  37. physics

    What is the magnitude of the electrostatic force on a +5 C harge 1.75 m to the left of a -2.5 C Charge? (show your work)
  38. physics

    How long is a rocket in the air if it is shot at an angle of 55¢ª with an initial velocity of 25 m/s and traveled for 88 m
  39. Physics

    The magnification of an object 2km tall where placed in 150m in front of a plane mirror is ?
  40. physics

    Calculate the speed of a ball tied to a string of length 1.5 m making 4.6 revolutions every second.
  41. Physics

    A steel guitar string is 73 cm long and 0.15 mm in diameter. If it's under tension of 1.5kN, how much is it stretched?
  42. physics

    Two asteroids, each with a mass of 6 million kilograms are attracted gravitationally with a force of 0.75 N. How far apart are their centers?
  43. math

    In physics class, the girl to boy ratio is 3 to 4. If there are a total of 14 students, how many girls are there?
  44. physics

    2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
  45. physics

    2) The weight of tank is 50 000 kg, area of his tracks is 5 m2. What pressure acts on the ground?
  46. Physics

    What is the instantaneous speed 3 seconds into the journey of a car traveling at a constant velocity of 10 m/ s?
  47. physics

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

    What is the difference between universal gravitational constant and acceleration due to gravity
  49. Physics

    8. Fire engines used to be red. Yellow-green is now the preferred color. Why the change?
  50. Physics

    Find the velocity of microwaves having wavelength of 0.75m and frequency 2.75X10^10hz
  51. Physics

    Two resistors 10 Ù and 5 Ù are connected in parallel across a 15 V battery. What is the potential difference across the 10 Ù resistor? Which formula do I use?
  52. Physics

    what is the distance that a satellite must be from Earths surface if it's period of rotation is 1 day? I really not sure where to even start..
  53. physics

    A 3.00 kg rock is dropped from a bridge and strikes the water below with a velocity of 40.0 m/s. What is the momentum at impact?
  54. physics

    How might you determine the age of a star from an Earth-based telescope? What measurements might you make?
  55. physics

    2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
  56. physics

    2) The weight of tank is 50 000 kg, area of his belts is 5 m2. What pressure acts on the ground?
  57. physics

    what is the power of a 6 ohm bulb when 3 of such bulbs ar econnected in a 12 volt parallel circuit?
  58. Physics

    What is electric field required at the tip of sharp needle to ionize air?
  59. Physics

    Name any Margins of error that would happen in the lab "Which path requires the most energy? (gas)
  60. math

    In physics class, the girl to boy ratio is 3 to 4. If there are a total of 14 students, how many girls are there?
  61. physics

    A young girl is on a swing that completes 20.0 cycles in 25 seconds. What are its frequency and period?
  62. Physics

    a racing car has a uniform acceleration of 4 m/s2 What distance will it cover in 10secs after its start
  63. physics

    Which floats with most of its volume below the surface? A) None of these.B) An oak log.C) All of these.D) An iceberg.E) A mountain range.
  64. physics

    How long, in seconds, is required for a car traveling at a speed of 32 km/hr to travel 110 m?
  65. physics

    Which floats with most of its volume below the surface? A) None of these.B) An oak log.C) All of these.D) An iceberg.E) A mountain range.
  66. physics

    A bullet is fired in to s wall losses half of its velocity after penetrsting 3m.how much further will it penetrate.
  67. physics

    How might you determine the age of a star from an Earth-based telescope? What measurements might you make?
  68. Physics

    Find the velocity of a car of mass 1300kg and has kinetic energy of 3800 J.
  69. physics

    A 6.2kg piece of metal displaces 0.80 L of water when submerged.Find its density.
  70. physics

    So if I have two light bulbs with different wattage how could I show what happens to them in series and parallel. The voltage remains the same.
  71. Physics

    A car starts from rest and accelerates for 3.9 s with an acceleration of 5 m/s2 . How far does it travel? Answer in units of m
  72. physics

    if a race cars velocity increases from 4 m/s to 36 m/s over a 4 s time interval, it average acceleration would be 10 m/s2.
  73. Physics

    Suppose you walk toward a mmirror at 2 m/s. How fact do you and your image approach each other? Explain your reasoning.
  74. Physics

    Your friend says that the wavelength of light waves is less in water than in air. Do you agree or disagree, and why?
  75. Physics

    To rearrange the furniture in your room, you need to exert a force of 20 N to push your desk 10 m. How much work do you do?
  76. physics

    does a ball moving at a constant speed around a circular track produce acceleration?
  77. Physics

    Find the length of a simple pendulum that completes 16.0 oscillations in 52.0 s. CAN YOU PLEASE EXPLAIN SPECIFICALLY , THANK YOU!
  78. Physics

    How much work is needed to stop a 20g bullet moving with a speed of 150ms-1
  79. physics

    A jet travels at 435 m/s. How long does it take to travel 253 m? Answer in units of s
  80. Physics

    At what projection angle will the range of a projectile equal to 5 times its maximum height?
  81. physics

    A ball is thrown straight up with an intial velocity of 85 ft/s. At what times will it have a height of 200 ft?
  82. physics

    Starting from the constant-acceleration kinematic equations, write a formula that gives xf in terms of t, xi, vf, and a. xf
  83. physics

    How long does it take light to travel through a 3.2mm -thick piece of window glass?
  84. Physics

    An object accelerates uniformly from rest and covers 8m in 2 seconds. What is the distance covered in the third second?
  85. physics

    Your friend of mass 80 kg can just barely float in freshwater.Calculate her approximate volume.
  86. physics

    Uranium 235 has 92 protons in its atoms. Calculate the number of neutrons in this atom
  87. Physics

    What is the acceleration experienced by the tip of the 1.5 cm-long sweep second hand on your wrist watch?
  88. Physics

    What is the direction of force of friction on a bicycle on front and back wheel while paddling?
  89. physics

    you drop a penny off the roof and it htis the water 4.2 seconds later, what is the height of the bridge?
  90. 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?
  91. physics

    a ball is dropped from the top of a 5m tall building. what is the velocity when it hits the ground?
  92. Physics

    While sitting in class your body exerts a force of 600 N on your chair. how much work did you do?
  93. physics

    Whn sand is poured on a rotatory disc what happens to its angular velocity. Explain
  94. Physics

    Assume the utility rate to be $.20/kWh. What is the cost of purchasing 10kW for 1.0 hour?
  95. physics

    a 1540 kg truck is traveling at 95 km/hr. what average force is required to stop in 10 seconds
  96. physics

    What is the rotational speed of the minute hand on a clock? Convert from rad/s to rev/s
  97. physics

    How much work is required to lift a 280 kg refrigerator to the second-story level that is 6m high?
  98. Physics please help me!

    Prove the law of sines for triangle ABC i.e sinA/a=sinB/b=sinC/c.0 please help me!!!
  99. Physics

    The sum of 2 vectors is the smallest when the angle between them is : a) 0 b) 45 c) 90 d) 180 d) i believe is the correct answer but i'm not sure exactly. Thanks in advance for your help.
  100. Physics

    Find the maximum height reached by a ball thrown upward at a velocity of 95 ft/s
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