Math/Physics

214,413 results, page 56

  1. Physics honors

    If a racer runs at an average speed of 7m/a how far will she run in 1 min 45 seconds?
  2. Quick Physics Question

    Are both linear and angular momentum conserved in static equilibrium ?
  3. physics

    A 84.0 kg person is being pulled away from a burning building as shown in the figure below.
  4. PHYSICS

    what is the angle velocity of an object in a horizontal circular part with radius 1.5 with a constant speed of 12/s
  5. physics

    A mango fruit drops from the top of it's tree which is 40 m. How long does it takes to reach the ground
  6. physics

    If your car goes from 0 mi/h to 70 mi/h in 8 s, what is your average acceleration? Answer in units of miles/(hours x seconds ).
  7. physics

    A uniform rod of 1 meter is bent at its midpoint to make90.The distance from its centre of mass
  8. physics

    How many minutes would it take a radio wave to travel from the planet Venus to earth?
  9. physics

    An object is projected at an angle of elevation of 45 degree with a velocity of 100m/s. Calculate it's range
  10. Physics

    To what potential a sphere of radius 10cm be charged so that the surface density of charge is equal to 1
  11. Physics

    consider the circuit in the figure. find the current in the 13 ohm resistor. Answer in units of A
  12. Science physics

    How would the voltage output be affected if the armature is made to spin faster?
  13. Physics

    the co efficient of friction of a plane inclined at 30 degree is 0.4 . Then the acceleration of the body sliding freely on it is?
  14. physics

    A car slows down uniformly from a speed of 24.0 m/s to rest in 4.50 s. How far did it travel in that time?
  15. Physics

    If a man travels 7km N 40degree W and 10km East, find the resultant displacement.
  16. physics

    when an apple falls from a tree, and strikes the ground without bouncing, what happens to its momentum?
  17. physics`

    which has more momentum: a snail moving at .001m/s or a 2-ton boulder resting on the ground? why?
  18. physics

    What mass of ice at -14°C will be needed to cool 200cm³ of an orange drink(essentially water) from 25°C to 10°C?
  19. physics

    A particle is projected with a speed of 39.2m/sec at an elevation of 30degrees.find its greatest height.
  20. Physics

    a boat sails 150km N60°E, then 100km West. What is it's displacement from its starting point?
  21. physics

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

    A 62 kg person is skiing down a 37 degree slope that has a coefficient of 0.15. what is their velocity after 5.0 seconds
  23. physics

    An object is projected at an angle of elevation of 45 degree with a velocity of 100 m/s calculate its range
  24. Physics II

    find the pressure at the bottom of a vessel 76cm deep when filled with a) water b)mercury (sp.g. 13.6)
  25. physics

    How much heat energy must be added to a 3.0 cm × 3.0 cm × 3.0 cm block of aluminum to raise its temperature from -50∘C to 50∘C?
  26. Physics

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

    A stone with a mass of 20kg and density of 20,000kg/m3 is immersed in water. Find its weight
  28. physics

    which formular do to use to calculate distace in newton's law if i have height and angle?
  29. physics

    How much work isneeded to stop a 20g bullet moving with a speed of 150m/s
  30. Physics

    Things around you are emitting infrared radiation that includes the wavelength 1.13 10-5 m. What is the energy of the photons?
  31. Physics

    Find speed of sound in air if distance is 170 meters and time is 1.1 second
  32. Physics

    What is the linear acceleration of a point on the rim of a 38 cm-diameter record rotating at 33 1/3 rev/min?
  33. physics

    A positive and a negative charge, each with a magnitude of 1.41 x 10^-5 C, are separated by a distance of 0.44 m. Find the force on each of the particles.
  34. Physics

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

    the speed of a train increases from 15 mi/h in a distance of 500 ft. calculate the average acceleration in ft/s squared
  36. Physics

    What is the direction of the displacement of a person who walks 10 km at 37 degrees south of east, then 14 km due west?
  37. physics

    An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source
  38. physics

    An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source
  39. Physics

    How long does it take a car to change it velocity from 15m/s if it accelerarate uniformly at 5m/s square?
  40. Physics

    The density of the dead sea is 1240kg/m^-3. Calculate the depth at which the pressure would be 3 atm
  41. PHYSICS!

    Find the gauge pressure in pascals in a soap bubble 0.04 m in diameter. The surface tension is 25.0 x 10^4 Pa.
  42. Physics

    Two instances during which the heating effects of electric current is not required pls
  43. physics

    And and climb up 5 stairs , each of width 20 cm and height 20 cm . Find the distance covered and displacement of ant ?
  44. Physics 2

    What quantity of heat is needed to convert 1kg of ice at -10C to liquid at 20C?
  45. Physics

    The ratio of maximum and minimum magnitudes of the resultant of two vectors a and b is 3:1 now |a| is equal to
  46. physics

    a cricket ball is takes 3 sec to reach the maximum height its initial velocity is???
  47. physics

    How many electron can passes through a cross sectional area of a conductor per second
  48. Physics

    A bowling bowl has a mass of 25 KG. What is the acceleration of the ball if an upward force of 110 N is applied?
  49. Physics PLS HELP

    What is the difference between universal gravitational constant and acceleration due to gravity
  50. physics

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

    How come in the number 5.350, there are 4 significant figures? Is the 0 considered a trailing zero with a decimal?
  52. physics

    a pendulum swing with a speed of 1.5 m/s at its lowest point. How high will it rise before it stops
  53. Physics

    A bike starts from rest and accelerates to 20 m/s over a period of 6 seconds. What is the acceleration of the car?
  54. Physics

    How can an object be a specular reflector for some electromagnetic waves yet be diffuse for others?
  55. Physics! NEED HELP!

    A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?
  56. Physics

    What is the normal force when a 40 kg person jumps and is accelerating at 3 m/s2 upward while in contact with the ground?
  57. Physics

    What is the normal force when a 40 kg person jumps and is accelerating at 3 m/s2 upward while in contact with the ground?
  58. As physics

    General braking distance formula /working out please clearly say.
  59. physics/electrical circuits

    if there are eleven resistors of 33k ohms each in parallel, what is the total resistance?
  60. Physics

    I have to check that Maxwell's equations are dimensionally correct. How the hell can I do this? Thank you very much.
  61. physics

    Explain why you don’t need a displacement vs. distance graph for light, but you do for other traveling waves.
  62. Physics

    Emily rides her horse 48 km in 3 hours.What is her average speed in kilometers per hour?
  63. physics

    An object is dropped from a height H. During the final second of its fall, it traverses a distance of 57.8 m. What was H?
  64. Physics (HELP)

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

    What takes more energy to raise its temperature by one degree, water or ice? Thanks!
  66. Physics

    calculate the magnitude and direction of the resultant of two vectors 5N and 7N inclined at an angle 30° to each other
  67. Physics

    Find the force necessary to stop a 900 kg jetta traveling at +25 m/s in a time of 5.0 seconds.
  68. Physics

    Calculate the velocity of a 6kg riffle that shoots a 0.025kg bullet at a speed of 615m/s.
  69. physics

    a car of mass(m)800kg initially at rest is accelerated at rate of 4m/s calculate the k.e @ 5seconds
  70. Physics

    Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary.
  71. Physics

    I am curious how the earth work as an omnipresent conductive surface in an electrical distribution system?
  72. Physics

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

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

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

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

    What is the gravitational force on a 20Kg satellite circling the earth (Re = 6.4 x 10^6 m, Me = 6 x 10^24Kg) with a period of 5hr?
  77. Physics

    The oscillator of a 96.1-MHz FM station has an inductance of 1.8μH. What value must the capacitance be? 1.5e-12 is wrong?
  78. physics

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

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

    A photon a. is a quantum of light b. is a wave c. means bundle of energy(I think it's this one)
  81. Physics

    A cricket jumps vertically upwards, and remains in the air for 1.6 s. At what speed did it leave the ground?
  82. physics

    Give two examples of ways that physicists model the physical world. I was wondering if this would be an effective answer for "give two examples of ways that physicists model the physical world." 1. Physicists build computer simulations. 2. They build small-scale replicas. I ...
  83. algebra 2

    Lincoln High School has 98 teachers. Of the 42 female teachers, 8 teach math. One seventh of all of the teachers teach math. What is the probability that a teacher is a man or does not teach math?
  84. math

    i m always having a problem in math. i can't do fraction easilly. im going to have an final exams , starting on 2 april . i hope if any one can help me. You need to tell us, in detail, what you don't understand about fractions. o!isnt the test the...SAT?? yes,,im good at math ...
  85. Physics - General Physics

    Violet light and red light travel through air and strike a block of plastic at the same angle of incidence. The angle of refraction is 30.700° for the violet light and 31.380° for the red light. The index of refraction for violet light in plastic is greater than that for red...
  86. physics

    Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration that has a ...
  87. Physics.. please help!!!!!

    A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 16 m/s at angle of 46◦ above the horizontal. The top of the fence is 4 m high. The ball hits ...
  88. Physics

    A 40 gram bullet is fired horizontally from a gun with a momentum of 2.8 (kg*m/s) and embeds itself into a 300 gram block of wood initially at rest on a wooden horizontal surface. After this collision the wood block slides 15 meters before falling off a table with a height of ...
  89. physics

    A 40 gram bullet is fired horizontally from a gun with a momentum of 2.8 (kg*m/s) and embeds itself into a 300 gram block of wood initially at rest on a wooden horizontal surface. After this collision the wood block slides 15 meters before falling off a table with a height of ...
  90. Physics (maybe it's just math)

    A sphere of copper is subjected to 89.7 MPa of pressure. The bulk modulus is 130 GPa. a) By what fraction does the volume of the sphere change? b) By what fraction does the radius of the sphere change? for a) I have dV/V = 0.00069 - this is correct. for b) the area I have 4/3 ...
  91. physics- response to bobpursley

    which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and an equivalent amount...
  92. Math - Precalculus - Parametric Equations/Geometry

    A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive real axis. (a) At time t=0, the center of ...
  93. Physics,Question ,Solved but about Units?

    These are “plug-in-the-number” tasks to familiarize you with the main formulas that link the physics concepts of this chapter. They are one-step substitutions, much less challenging than the Think and Solve problems that follow. Average speed ! total distance covered ...
  94. physics

    Long, long ago, on a planet far, far away, a physics experiment was carried out. First, a 0.250 kg ball with zero net charge was dropped from rest at a height of 1.00 m. The ball landed 0.350 s later. Next, the ball was given a net charge of 7.60 muC and dropped in the same ...
  95. physics 4

    help me in this topicsmass vol.relationship,graphs and itinterpretation,vectors and scalars help me more to understand this topics the tools in physics,measurement,vectors and scales It is quite impossible to divine what you don't understand. We can easily critique your ...
  96. math

    Show that if x is a nonzero column vector in R^n, then the nxn matrix: A = I - 2/||x||^2 * xx^T is orthogonal. Notation key: ||x|| = norm of x x^T = transpose of x I = identity matrix. Let me try to convince a math student to use "physics" notations that many mathematicians ...
  97. physics

    An inquisitive physics student, wishing to combine pleasure with scientific inquiry, rides on a rollercoaster sitting on a bathroom scale. (Do not try this yourself on a rollercoaster that forbids loose heavy packages.) The bottom of the seat in the rollercoaster car is in a ...
  98. physics

    While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The now-stationary ambulance runs its siren as it's about to drive...
  99. physics

    While standing on 3rd street you hear an approaching ambulance. Its siren oscillates in frequency between about 650 Hz and 750 Hz. Later on as you near your destination, you come upon the scene of the accident. The now-stationary ambulance runs its siren as it's about to drive...
  100. PHYSICS

    ADDITIONAL INO ADDED AT BOTTOM a spectator at a hockey game is sitting in a seat situated 10.4m above ground leve. if the spectator has a mass of 52.6 kg, calculate her gravitational potential energy relative to: a)ground level Eg=mgh =52.6X9.8X10.4 =5360.99J b)the ice surface...
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