Math/Physics

214,413 results, page 53

  1. physics

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

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

    You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/- 3mm. The area would be A +/- a cm^2. a. What is A? b. What is a?
  4. Physics

    You have a circular table. You measured its radius to be 10 cm with an uncertainty dr =+/- 3mm. The area would be A +/- a cm^2. a. What is A? b. What is a?
  5. PHYSICS

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

    Determine the net force needed to cause a 1310kg sports car to accelerate from 0 - 28.6m/s[fwd] in 5.6 s
  7. physics

    A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s
  8. Basic Physics

    If a swimming pool has dimensions; 28.2 5m x 10.0m x 2.30m, when it is full of water, what is the force on the bottom ?
  9. physics

    A spring has a force constant of 70000 N/m. How far must it be stretched for its potential energy to be 21 J?
  10. physics

    what will happen to the bone structure if earth becomes more dense than its actual density?
  11. physics 11

    By how much would 1200 W kettle, which is 72% efficient raise the temperature of 0.60 kg of water in 3.0 min?
  12. physics

    what has no beginning and no end. it is also considered as the medium for light in einstein's theory of relativity
  13. physics

    An argon atom has a mass of 6.64 x 10 kg has 5.5x108 joules of kinetic energy. At What velocity is it moving?
  14. physics

    calculate the friction force of an object? if weight=19600,vi=30ms-1,vf=0ms-1 and S=100m.
  15. physics

    if a car moving 180km/h reduces to 72km, what is the percentage change in kinetic energy?
  16. Basic Physics

    What is the force of gravity between two spheres that have a mass of 8 kg and are separated by 27 m?
  17. physics

    find the force if f between charges of +100mc -50mc located 50cm a part?
  18. physics

    find the force if f between charges of 100mc -50mc located 50cm a part?
  19. physics

    what is the kinetic energy of a 3 kg 20 cm diameter bowling ball with a linear velocity of 4m/s? (rolling and spinning)
  20. physics

    the magnitude of the tongue produced by a 3.0n force applied to a door at a perpendicular distance of 0.25 m from the hinge
  21. Physics

    How many joules would be required to raise the temperature of 20g of ice at oC to water at15C?
  22. 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
  23. 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.
  24. physics

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

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

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

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

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

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

    What magnitude point charge creates a 13000 N/C electric field at a distance of 0.220 m?
  31. 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?
  32. Physics

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

    A person stands 2.0 m away from the reflecting surface of a plane mirror. What are the image characteristics?
  34. 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 ????
  35. 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.
  36. Physics

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

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

    What can we say about the force of an object when the mass increases and acceleration remains constant?
  39. 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
  40. physics

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

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

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

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

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

    Consider a concave mirror with radius R. An upright object is placed in between the interval R/2 and R. R
  46. 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
  47. Physics

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

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

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

    * JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
  51. 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?
  52. physics

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

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

    How long does it take to deliver 315 J of energy to 0.850 cm^2 of a wall that it hits perpendicularly?
  55. 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
  56. physics

    How long does it take light to travel through a 2.7 mm-thick piece of window glass?
  57. 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)
  58. Physics

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

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

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

    A car covers a distance of x,while moving at 54km/1 in 15sec.Find the value of x
  62. 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?
  63. 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)?
  64. physics

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

    a polar satellite is launched at 850 km above Earth .find its orbital speed.
  66. 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?
  67. 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?
  68. Physics

    Air in a balloon does 50 J of work while absorbing 70 J of heat.What is its change in internal energy?
  69. 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)
  70. physics

    if a bus travels north with a constant velocity of3m/s, what is the displacement after 15 seconds?
  71. 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
  72. physics

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

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

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

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

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

    What electromagnetic waves are dangerous for humans and why? I have microwave, xrays....can you help name a few
  78. 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
  79. 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?
  80. physics

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

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

    A body immersed in liquid has an upthrust of 140N with a density of 12kg calculate the velocity
  83. 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
  84. 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?
  85. Physics

    What is the car's forward acceleration,at a speed of 30m/s,when the driving force on the wheels is 650N
  86. 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?
  87. physics

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

    a 52kg person riding a bike rotates her wheels in a circle of 17 cm what is her max tourque
  89. 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.
  90. 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?
  91. 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?
  92. Physics

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

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

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

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

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

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

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

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

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