Physics!

74,459 results, page 49

  1. physics

    An equipotential surface that surrounds a point charge q has a potential of 516 V and an area of 1.01 m2. Determine q
  2. Physics

    A jeep has a speed of 50 m/s at a given instant and 10 m/s later. fin its retardation, assuming it to be constant.
  3. physics

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

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

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

    what is meant by the change go temperature of 1 degree celcius on the scale of a plantinum resistance thermometer
  7. physics

    How long does it take light to travel through a 3.3 mm-thick piece of window glass?
  8. physics

    a frieght train rolls at the same speed but has twice as much mass its momentum is
  9. physics

    What magnitude point charge creates a 13000 N/C electric field at a distance of 0.220 m?
  10. Physics

    A downward force of 5.1 N is exerted on a -7.3 mcirco C charge. What is the magnitude of the electric field at this point?
  11. Physics

    What is the electrostatic force between two ballons, each having 0.000005 C of charge, when they are 0.5 m apart?
  12. Physics

    A person stands 2.0 m away from the reflecting surface of a plane mirror. What are the image characteristics?
  13. physics

    If a protonand an electron are released when they 2.0X10^-10m apart, find the initial accelerationof each of them. I know a=ke^2/mr^2 k = 8.99 x 10^9 e = 1.6 x 10^-19 r = 2.0x 10^-10 so what is the m ????
  14. physics

    An equipotential surface that surrounds a point charge q has a potential of 590 V and an area of 1.20 m2. Determine q.
  15. Physics

    what is the average force needed to stop a car (1000kg) traveling 28m/s in 55m?
  16. physics

    the force required to maintain an object at a constant velocity in free space is eaqual to?
  17. Physics

    What can we say about the force of an object when the mass increases and acceleration remains constant?
  18. physics

    what is the height of the ball if the bottom of the swing is zero, speed is 2.8m/sec, 9.81 acceleration of gravity
  19. physics

    When a transverse wave on a string is reflectred from the free end the phase change produced is-------
  20. physics

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

    Calculate a person's hang time if he moves horizontally 2 m during a 1.39 m high-jump.
  22. Physics

    How can we find the resultant force if the mass and SPEED are given?? Give me the formula please!!
  23. physics

    A particle starts moving with acceleration 2 m/s2. distance travelled by it in 5th half second is..??
  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

    a 125 cm long string has a mass 2.0g and it is stretched with a tension of 7.0 IN between fixed support
  26. Physics

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

    Calculate the work required to be done to stop a car of 1500kg moving with a velocity of 60km/hr?
  28. conceptional physics

    If a 35cm radius tire spins at a rate of 72 rad/s what is the rotating speed?
  29. Physics "scientists"

    * JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
  30. 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?
  31. physics

    2. Determine the theoretical yield of aspirin if you started with 2.500 grams of salicylic acid?
  32. physics

    problem E2_2 Strain, boundary conditions, displacement and elongation: Part I Plz help.
  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

    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
  35. physics

    How long does it take light to travel through a 2.7 mm-thick piece of window glass?
  36. Physics

    2. How many oxygen atoms are indicated on the right side of this balanced chemical equation? 4 Cr(s) + 3 O2( g)h2 Cr2O3( g)
  37. Physics

    A fuel has heat of combustion equal to 30 kJ / g. How much energy is released when 5 kilograms are oxidized?
  38. Physics

    Which of the following is the correct relationship between the electric field strength and the potential difference?
  39. physics

    describe with the aid of a fully labelled diagram the features and their uses of a bicycle pump
  40. physics

    A car covers a distance of x,while moving at 54km/1 in 15sec.Find the value of x
  41. physics

    What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s?
  42. Physics

    What is the circular force of a 150 g yoyo swung around on a 1.00 m string at a velocity of 5.0 m/s (in Newtons)?
  43. physics

    what is meant by liquefaction of gases? can hydrogen be liquefied by compression at the temperature of liquid air?
  44. physics

    a polar satellite is launched at 850 km above Earth .find its orbital speed.
  45. physics

    If I have 1.5 moles of an ideal gas at a pressure of 3 atmospheres and a volume of 7 liters, what is the temperature?
  46. Physics

    A meteoroid is speeding through the atmosphere, traveling east at 23.1 km/s while descending at 18.3 km/s. What is its speed, in km/s?
  47. Physics

    Air in a balloon does 50 J of work while absorbing 70 J of heat.What is its change in internal energy?
  48. PHYSICS

    How much heat must be added to 1.0 kg of iron to raise its temperature from 20°C to 95°C? (ciron = 0.11 cal/g•°C)
  49. physics

    if a bus travels north with a constant velocity of3m/s, what is the displacement after 15 seconds?
  50. physics

    a 1000 kg car with an average power of 100 kw accelerates from 0 to 50 m/s. how long does it take to accomplish this
  51. physics

    75 kg block is dropped from a height of 6 m. How much kinetic energy does it have when it has fallen halfway?
  52. physics

    how much work is needed to stop a 20g bullet moving with a speed of 150 ms-1
  53. Physics

    What is the formula to find magnetic field at the centre of the solenoid of hollow iron core??
  54. physics

    (a) How many kilograms of water must evaporate from a 60.0 kg woman to lower her body temperature by 0.750°C?
  55. Physics

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

    What electromagnetic waves are dangerous for humans and why? I have microwave, xrays....can you help name a few
  57. Physics

    A stone is thrown vertically upward with a speed of 19.0m/s How fast is it moving when it reaches a height of 10.0m
  58. Physics

    A car travels in a straight line for 4 h at a constant speed of 63 km/h. What is its acceleration? Answer in units of m/s^2?
  59. physics

    Find the field produced by a uniformly charged sheet carrying 93pC/cm2 .
  60. Physics

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

    A body immersed in liquid has an upthrust of 140N with a density of 12kg calculate the velocity
  62. 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
  63. physics

    A meteoroid is speeding through the atmosphere, traveling east at 24.5 km/s while descending at 11.6 km/s. What is its speed, in km/s?
  64. Physics

    What is the car's forward acceleration,at a speed of 30m/s,when the driving force on the wheels is 650N
  65. physics

    A meteoroid is speeding through the atmosphere, traveling east at 19.5 km/s while descending at 12.7 km/s. What is its speed, in km/s?
  66. physics

    calculate the linear momentum of a truck with a mass of 13065kg that is traveling at 36m/s eastward.
  67. Physics

    a 52kg person riding a bike rotates her wheels in a circle of 17 cm what is her max tourque
  68. physics

    Show that the magnitude of the charge on a capacitor is given by Q = (Qo(1-e^-(t/T))) and Q = Qoe^-(t/T) for charging and discharging, respectively.
  69. physics

    With V = Voe^-(t/T), how many time constants does it take for a capacitor to discharge less than 1% of its initial voltage?
  70. physics

    How much work does a student do if he throws a 0.750 kg ball with force of 45.0 N through a distance of 1.50 m?
  71. Physics

    What is the kinetic energy of a 1100 kg sports car traveling down the road with a speed of 22 m/s?
  72. physics

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

    on a cool night with no wind people facing a campfire feel a breeze on their backs. why?
  74. Physics

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

    Why do some cooks put long aluminum nails through potatoes to be baked?
  76. Physics

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

    Why do some cooks put long aluminum nails through potatoes to be baked?
  78. physics-

    In a string and pulley problem, will friction increase or decrease the tension.can you please explain if you can?
  79. Physical Science

    What are the noninvasive benefits of the medical technologies that rely on physics of elementary particles?
  80. PHYSICS

    How is the evolution of animal like the long necked giraffe explained by Charles Darwin?
  81. physics

    If a solid is stretched or compressed beyond the point that it can return to its original shape it has passed its
  82. physics

    Write the equation for fill factor in terms of V_max, V_oc, J_max, and J_sc. FF =
  83. Physics

    A bus slows down uniformly from 75 km/h to 15 km/h in 12.55 s. How far did the car travel before stopping?
  84. Physics

    If an electron moves perpendicular to the same field with this speed,what is the radius of its circular orbit?
  85. physics

    How much time does it take a pulse of light to travel through 180\({\rm {\rm m}}\) of water?
  86. physics

    A body of mass 10kg in air and 4kg in water calculate the volume and its density
  87. Physics

    A 1.25kg book in space has a weight of 8.35N. What is the value of the gravitational field at that location ?
  88. physics

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

    a year ago she measured 98cm from her tree . now it 1.1m tall how much has it grown
  90. physics

    a block of wood of 200g is thrown vetically with a veloncity of 20mls what is the pontential energy?
  91. physics

    A car is moving down a highway at -15 m/s and accelerating at 3 m/s^2. If it's initial position is at x = 0 m where will it be after 3 seconds?
  92. physics

    A driver drives 2.5 hours at an average speed of 48MPH. What distance does she travel in this time?
  93. physics

    A driver drives 2.5 hours at an average speed of 48MPH. What distance does she travel in this time?
  94. Physics

    Make a predictive statement about the path dependence of accelerations due to gravity
  95. Physics

    A car accelerates from 12m/s to 25m/s in 6.0s. What is its uniform acceleration? How far did it travel in this time?
  96. Physics

    If the fundamental frequency of an 70 cm long guitar string is 470 Hz, what is the speed of the traveling waves?
  97. Physics

    Find the net force and the acceleration for the situation below. 30N 20N <---------------[ 5.1kg]---------->
  98. Physics

    A person is travelling 6 km (E) then 4 km (N) and finally 2 km (W). Calculate the average speed And velocity. Show your work
  99. Physics

    A 56 kg swimmer jumps off of 15 m tower. Find the swimmers velocity when hitting the water.
  100. physics-lenses

    trace and describe the image formed by a convex lens (object between 2f and f)
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