Math/Physics

214,413 results, page 84

  1. physics

    is it possible to change both the pressure and the volume of an ideal gas without changing the average kinetic energy of the molecules?
  2. Physics

    A soccer player kicks a rock with an initial velocity of 0.50 m/s from a height of 4.0 meters. What is the speed of the ball 0.70 second after it is released? Vi = 0.50 m;s h = 4 m t = 0.70 s
  3. Physics

    Compute the derivative of the given function and find the slope of the line that is tangent to its graph for the specified value f the independent variable. f(x) = 9x^2 – 2x + 8; x =3.
  4. physics

    A 3 meter tall 40 degree inclined plane with a coefficient of friction of .3 with a box sliding from its top has this acceleration and final velocity.
  5. physics

    two pint charges are 4 cm apart. They are moved to a new distance of 2 cm. By what factor does the resulting mutual forces between them change. a. 1/2 b. 2 c. 1/4 d. 4
  6. physics

    What is the acceleration of the system if both blocks have a mass of 5.0 kg, and the coefficient of kinetic friction is 0.11? [___/4] (b) Determine the tension in the rope.
  7. physics

    Calculate the magnetic field at the center of a wire square that consists of 120 loops and has sides of length 5 cm and carries a current of 0.7 A.
  8. Physics

    How far from the center of the earth must a person be located in space so t hat his/her weight would be the same as when he/she is standing on the moon?
  9. physics

    two charged objects carry a negative charge of 2*10c. calculate their distance apart if the force between them is 10n
  10. physics

    Two point charges 1.5 cm apart have an electric potential energy -150 mu J. The total charge is 34 nC. what are q_1 and q_2?
  11. Physics

    Two objects attract each other gravitationally with a force of 2.1×10−10 N when they are 0.21 M apart. Their total mass is 4.00 KG Find their individual masses. .
  12. physics

    an electric field of 640 v/m is desired between two metal plats 11.0 mm apart. how large a voltage should be applied?
  13. Physics

    How much work (in J) must be done to lift a stack of bricks, which has a mass of 600 kg, from the ground to a height of 15 m? Acceleration due to gravity is 10 m/s2
  14. physics

    I have a Pressure in atm and a volume in liters how do i find the temperature in kelvins?? I know the formula pv=nRT works...but i don't know the number of moles so... I don't know what to do.
  15. Physics

    Calculate how far and apart two indentical charges of 1.0 C must be in order for the Coulomb force between them be less than 500 N
  16. physics

    consider an electron near the equator. in which direction does it tend to deflect by the magnetic field of the earth if its velocity is directed a.northward
  17. Physics

    Electrons are ejected from a photoelectric cell with a maximum kinetic energy of 1.20 eV. If the incident light has a wavelength of 410nm, what is the work funtion?
  18. Physics

    How much work does the electric field do in moving a -7.7 micro Coulomb charge from ground to a point whose potential is +55 V higher?
  19. Physics

    How far to the nearest tenth of a meter can a runner running at 11 m/s run in the time it takes a rock to fall from rest 90 meters?
  20. Physics

    "At what point between two masses of 20kg and 15kg located 1.0m apart, will the gravitational field strength equal zero?"
  21. Physics

    A pendulum has a mass of 3-kg, a length of 3 meters and swings through a (half)arc of .47 radians. To the tenth of a Joule, what is its Total Energy?
  22. physics

    How do the pressure variations with depth affect our ability to explore the ocean? Consider the challenges of scuba diving and submarines.
  23. physics

    A box is pushed without acceleration 9.0m along a horizontal floor against a frictional force of 100N. How much work is done?
  24. physics

    An electric field of 630 V/m is desired between two parallel plates 15.9 mm apart. How large a voltage should be applied?
  25. physics

    what is the shortest possible time in which a bacterium could drift at a constant speed of 3.5mm/s across a petri dish with a diameter of 8.4cm
  26. physics

    A man whose mass is 75kg walks up a flight of 12 steps each 20 cm high in 5 seconds . Find the power he develops in watts
  27. physics

    A bullet is shot straight down at a speed of 3.9 m/s. After 2.3 seconds, how fast is it moving? Use 10 m/s2 for gravity. Give answer in m/s.
  28. physics

    three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)
  29. physics

    three point charges are located at the corners of a right triangle where q1=q3= 5uC,Q2= -2uC and r =10cm.(angle q1 q2q3=90 and q1q3=r)
  30. physics

    please HELP!!! What is the magnitude of the momentum of a baseball (m = 1.450 kg) traveling at a speed of 102 mi/h? Express your answer in SI units. I am unsure where to start
  31. physics

    Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?
  32. Physics

    Estimate the work you do to mow a lawn 14m by 23m with a 0.5m-wide mower. Assume you push with a force of about 15N.
  33. Physics

    Estimate the work you do to mow a lawn 14m by 23m with a 0.5m-wide mower. Assume you push with a force of about 15N.
  34. physics

    what force is being applied to a meteor with a mass of 500 kg as it travels at a constant velocity of 5000 meters per second?
  35. physics

    what kind of information is indicted by a graph of the acceleration due to gravity versus ball's mass if the slope of the curve is zero?
  36. physics

    How long does it take for the ball to hit the ground 7 meters below if it's thrown straight up wit intial velocity of 2 m/s squared?
  37. Physics

    A plane travels with a uniform velocity of 3.399x10^1 m/s for a period of 2.267x10^0 seconds. What distance is travelled during this time, in meters
  38. physics

    For my question about the carton's speed must I do each step you laid out or just the last one? I got the wrong answer. Thanks for your help.
  39. Physics

    In the rope climb, a 68 athlete climbs a vertical distance of 9.0 in 13 . What minimum power output was used to accomplish this feat? In Watts
  40. Physics

    In the rope climb, a 68 kg athlete climbs a vertical distance of 9.0 m in 13 s. What minimum power output was used to accomplish this feat? In Watts
  41. Physics

    A weight lifter cleans and jerks 150kg, lifting it 2m above the ground in 1.5s. What is his power output? How do you set this problem up i know the units?
  42. Physics

    What force is required to accelerate an object of 1.484x10^0 kg over a frictionless surface at -2.3580x10^0 m/s2 expressed to three significant figures.
  43. physics

    How long does it take a plane, traveling at a speed of 170 m/s, to fly once around a circle whose radius is 2900 m?
  44. physics:energy

    How much power is needed to push a box (mass 27 kg) over a surface (coefficient of friction μk=0.5) with a velocity of 1.1 m/s?
  45. Physics

    How fast must a 138 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with A = 100. pm?
  46. physics

    What is the magnitude of the apparent weight of a 69 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
  47. Physics

    A flywheel has a moment of inertia of 2.6 kg·m2. What is the average power needed to spin it up from rest to an angular velocity of 100 rad/s in 30 seconds?
  48. physics

    A 4kg box starts up a 30 degree incline with 128J of kinetic energy. How far will it slide up the plane if the co-efficient of friction is 0.3?
  49. physics

    A 4kg box starts up a 30 degree incline with 128J of kinetic energy. How far will it slide up the plane if the co-efficient of friction is 0.3?
  50. Physics

    A rock climber part way up a cliff face drops a piton and it falls for 2.0 s before hitting the ground. How high up is he?
  51. PHYSICS ---HELP!

    A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot. a = 40 cm b = 95 cm c = 30 cm W = mg = 784 N
  52. PHYSICS ---HELP!

    A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot. a = 40 cm b = 95 cm c = 30 cm W = mg = 784 N
  53. Physics

    A skydiver has a terminal velocity of 9.0 m/s. If they have a mass of 98, what is their k value for their air resistance? Use g = 10 m/s/s and do not report units on your answer, they should be N s/m.
  54. Physics

    Calculate the radial acceleration of an object at the equator of Jupiter (which takes 0.410 day to spin once), turning with the planet. (in )
  55. physics

    What is the magnitude of the apparent weight of a 79 astronaut 5200 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
  56. physics

    Using Kepler's constant (9.84 X 10^-14), calculate the orbital radius of an artificial satellite whose period of revolution around the Earth is 1.43 X 10^4s(3.64 h).
  57. physics

    A car's maximum acceleration on a dry road is 10 m/s2. What speed should it have to be able to make a turn with a radius of 47 meters?
  58. physics

    A car's maximum acceleration on a dry road is 10 m/s2. What speed should it have to be able to make a turn with a radius of 47 meters?
  59. physics

    A dinner plate drops and breaks. This best illustrates the ______ law of THERMODYNAMICS A. 1st b. 2nd c. 3rd d. 4th
  60. physics

    A ball is thrown straight up with an initial speed of 60 m/s. How high does it go? Assume the accelera- tion of gravity is 10 m/s22 2)How long is it in the air?
  61. physics

    An automobile manufacturer claims that its product will travel 1.2 km in 27 s, starting from rest. What is the magnitude of the constant ac- celeration required to do this? Answer in units of m/s2.
  62. physics

    Q 2) A particle executes simple harmonic motion with an amplitude of 10 cm. At what distance from the mean position are the kinetic and potential energies equal ?
  63. physics

    two charges +1.2*10^-8 C and -1.6*10^-8 C are placed at the corners A and B of a right angled triangle ABC in which AB=3cm, AC=5cm. find the electric field at C.
  64. physics

    What are the magnitude and direction of the electric field at a point midway between a -7.0 µC and a +6.0 µC charge 2.5 cm apart? Assume no other charges are nearby.
  65. Physics: Fluids

    A sample of an unknown material weighs 260 N in air and 175 N when immersed in alcohol of specific gravity 0.700.
  66. PHYSICS: Waves in Media

    An organ pipe is open at one end and has a length of 3 m. What is its fundamental frequency if the speed of sound is 336 m/s?
  67. physics

    The coefficient of kinetic friction for a 22 kg bobsled on a track is 0.20. What force is required to push it down a 6.0° incline and achieve a speed of 70 km/h at the end of 75 m?
  68. Physics

    What is the difference in blood pressure (mm-Hg) between the top of the head and bottom of the feet of a 1.008 m-tall person standing vertically?
  69. AP Physics B

    An object of mass 3.2 kg is allowed to fall from rest under the force of gravity for 3.5 s. What is the change in its momentum? Ignore air resistance.
  70. Physics

    Determine the initial acceleration of a 1 kg solid aluminum chunk (density = 2,700 kg/m3) released from rest by a diver 10 m under the ocean.
  71. physics

    An object sits 29m above the ground and has a mass of 47 kg. How much potential Energy does it posses 1.5 seconds after falling?
  72. physics

    calculate the horizontal force that must be applied to produce an acceleration of 1 g for 1 kg. puck on a horizantal frictiom-free air table.
  73. Physics

    A bomber is flying at a velocity of 200.0 km/hr with an altitude of 1.5 km. How far (horizontally) from its intended target should the plane drop the bomb?
  74. Physics

    Carbon dioxide forms into a solid (dry ice) at approximately -157°F. What temperature in degrees Celsius does this correspond to?
  75. Physics

    1. A 2,000 kilogram truck traveling at 60km/h strikes a tree and stops in 0.75 seconds. How large is the force that causes this to occur?
  76. Physics

    How much work is done by a boy weighing 450. Newtons while carrying a 20.0 kilogram package up a 2.00 meter flight of stairs?
  77. Advanced Physics

    one kilogram is poured into a cylandrical vase and fills it to a depth of 8 cm. find the cross section of the cylander. how do i do this?
  78. Physics

    A projectile is fired straight up at a speed of 16 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/s2 . Answer in units of s.
  79. physics

    a 35.5kg box slides down an incline plane with a 25 degree angle at a constant rate. how do i calculate the coefficient of friction
  80. physics

    the sound from a mosquito is produced when its wings vibrates at an average rate of 500 vibrations/sec.What is the tine period of the vibration?
  81. physics

    for starting from rest and moving in a straight line,runner achieves a velocity of 7m/s in a time of 2 seconds .what is the average acceleration of the runer.
  82. Physics

    Two bullets have masses of 4.6 g and 11 g, respectively. Each is fired with a speed of 41.0 m/s. a) What is the kinetic energy of the first bullet? Answer in units of J.
  83. physics

    activity to demonstrate the fact that for a metallic wire of uniform material density and thickness, the resistance increases directly with its length.
  84. please help with physics

    a gun tilted upward at 30 degrees fires a bullet with a speed of 215 m/s. what is the bullets velocity parallel to the ground
  85. College Physics

    how much work is required to completely separate two charges (each -1.4 microcoulombs) and leave them at rest if they were initially 8 mm apart?
  86. physics

    CALCULATE THE ACCELERATION FOR A 10.0 KG BLOCK WHICH IS BEING PULLED UP A 35.0 DEGREE SLOPE BY A FORCE OF 140 N IF THE COEFFICIENT OF SLIDING FRICTION IS 0.100
  87. physics

    CALCULATE THE ACCELERATION FOR A 10.0 KG BLOCK WHICH IS BEING PULLED UP A 35.0 DEGREE SLOPE BY A FORCE OF 140 N IF THE COEFFICIENT OF SLIDING FRICTION IS 0.100
  88. Physics

    A 70-kg ancient statue lies in the bottom of the sea. It’s volume is 3.0 x 10 4 cm 3 How . much force is needed to lift it? (Use g=10 m/s 2 and the density of water is 1.0 x 10 3 kg/m 3
  89. physics

    Zephram is on roller blades on a hill. He starts from rest and skates for 5.5s accelerating uniformly at 3.5m/s2. Show that the distance traveled is 53m.
  90. Physics

    Two objects attract each other gravitationally with a force of 2.3×10−10 when they are 0.21 apart. Their total mass is 4.50 . Find their individual masses.
  91. Physics

    Two objects attract each other gravitationally with a force of 2.7×10−10 when they are 0.65 apart. Their total mass is 4.4 Find their individual masses.
  92. Physics

    What is the magnitude of the apparent weight of a 65 astronaut 3600 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
  93. Physics

    About how much pressure do the feet of a 6000-kg elephant exert on the ground? Assume each foot has area of 0.10 square meters.
  94. physics

    A snowboarder of mass 71.8 kg (including gear and clothing), starting with a speed of 4.8 m/s, slides down a slope at an angle θ = 37.1° with the horizontal.
  95. physics

    A transverse wave, frequency 15.0 Hz, travels along a string. Distance between a crest and an adjacent trough is 3.50m. What is its wavelength?
  96. Physics-Please help

    Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object
  97. Physics

    How fast (in rpm) must a centrifuge rotate if a particle 9.00cm from the axis of rotation is to experience an acceleration of 115,000g's?
  98. Physics

    If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 55cm* 30cm *16cm , what would its mass be?
  99. physics

    Solid and hollow cylinders both roll from rest down an inclined plane. Explain the difference in speeds at the bottom.
  100. physics

    1. How far apart must two protons be if the electrical force of repulsion acting on either one is equal to its weight?
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