physics please HELP !

74,760 results, page 64
  1. physics

    If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?
  2. physics

    If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?
  3. Physics

    What net external force is required to give a 30 kg suitcase an acceleration of 2.5 m/s2 to the right? Answer in units of N
  4. physics

    If you throw a ball straight upward at a speed of 11 m/s, How long will it take to return to its starting point?
  5. physics

    Find the work done by 2.32 moles of an ideal gas if its volume doubles at a constant temperature of 22.6°C.
  6. Physics

    A car accelerates uniformly from rest at 3m/s(square).What is its velocity after travelling a distance of 24m?
  7. physics

    If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?
  8. physics

    What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 10.5 m/s when going down a slope for 3.18 s?
  9. physics

    how much time does it take for a student running t an average speed or 5.00m/s to cover a distance of 2.00km?
  10. physics

    If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?
  11. Physics

    A car travels in a straight line for 3.9 h at a constant speed of 83 km/h . What is its acceleration? Answer in units of m/s2
  12. physics

    a particle starts moving from rest with uniform acceleration . it travels a distance y in the next 2 sec
  13. Physics

    If a man weighs 900 N on the earth, what would he weigh on jupiter, where acceleration due to gravity is 25.9 m/s^2?
  14. 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
  15. Physics

    You throw a ball downward from a window at a speed of 1.8 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?
  16. Physics

    Explain how a drop of water bulging over the edge of a coin demonstrates surface tension.
  17. Physics

    What is the maximum total force exerted on a 78 kg astronaut by her seat during the launch of the Space Shuttle?
  18. Physics

    a woman on a bridge 75 high sees a raft floating at a constant speed on the river below.
  19. GENERAL PHYSICS

    Two long, parallel wires separated by 90 each carry currents of 2.0 in a horizontal direction.
  20. physics

    If wind blows at 44 m/s over a house, what is the net force on the roof if its area is 180 m^2 and is flat?
  21. 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?
  22. physics

    a guy throws a ball up and catches it 3.5 seconds later. what is the max height and initial velocity. Please help!
  23. Physics

    With the energy needed to warm up some amount of water from 40C to 64C, how high could you lift it?
  24. Physics

    Q: A car travels in a straight line for 4.6 h at a constant speed of 95 km/h . What is its acceleration? Answer in units of m/s 2
  25. physics

    A boy sledding down a hill accelerates at 1.30 m/s2. If he started from rest, in what distance would he reach a speed of 8.00 m/s?
  26. physics

    Calculate the electrical attraction that a proton in a nucleus exerts on an orbiting electron if the two particles are 1.13×10^-10 m apart.
  27. physics

    if the direction of a magnetic field around a straight wire is counterlcockwise, which direciton is the current traveling?
  28. Physics

    A 6.25 kg solid ball with a radius of 0.185 m rolls without slipping at 3.55 m/s. What is its total kinetic energy?
  29. physics

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

    How fast (in ) must a centrifuge rotate if a particle 8.00 from the axis of rotation is to experience an acceleration of 117000 's?
  31. physics

    A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal. How far does it move horizontally
  32. physics

    A cars starts from rest and after 20 seconds its velocity becomes 108 km-1 find the acceleration of the car
  33. Physics

    how fast would you have to be traveling at in a spaceship in order to appear to age 20% slower than your classmate left behind on earth
  34. physics

    Calculate the distance you will travel if you maintain an average speed of 12km/h for one-half hour.
  35. Physics

    determine the image distance for an object that is 45.0 cm from a double convex lens having a focal length of 15.0 cm
  36. PHYSICS HELP

    what is the minimum amount of energy required to accelerate horizontally a 3.0g bullet from rest to a speed of 40.0 m/s?
  37. college physics

    How many seconds would it take a 7.00hp motor to raise a 475 lb boiler to a platform 38.0 ft high?
  38. Physics

    A 4610 kg helicopter accelerated upwards at 2 m/s^2. What lift force is exerted by the air on the propellers?
  39. Physics

    An airplane lands and starts down the runway at a southwest velocity of 41 m/s. What constant acceleration allows it to come to a stop in 1.3 km?
  40. physics

    State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS
  41. physics

    State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS
  42. physics

    A skater is gliding along the ice at 2.2 , when she undergoes an acceleration of magnitude 1.2 for 3.0 . At the end of that time she is moving at 5.8
  43. college physics

    how long would it take a 4.50kW MOTOR TO RAISE A 175KG BOILER TO A PLATFORM 15.0M ABOVE THE FLOOR?
  44. Physics

    How can you easily increase the magnetic field strength inside a current-carrying coil? Could someone help?
  45. mathematical physics

    Using Green's Theorem evaluate the integral ∮c(xydx + x^2y^2 dy) where C is the triangle with vertices (0 ,0), (1, 0) and (1, 2).
  46. Physics

    What equations should I use to calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5800 km above the earth's surface?
  47. physics

    Calculate the internal energy of 25.0 g of low-density oxygen gas (O2) at a temperature of 255 K.
  48. physics

    Consider the motion of the tip of the minute hand of a clock. In one hour, the displacement and average velocity is .......
  49. PHYSICS

    a constant force of 6.00N acts on a 3.00kg object for 10.0s. what are the changes in the objects momentum and velocity?
  50. Physics

    A 1300 sports car accelerates from rest to 90 in 6.5 . What is the average power delivered by the engine?
  51. physics

    What is the strength of intermolecular forces in methylated spirit, acetone, water, glycerin and oil
  52. physics

    Why does a conductor carrying current experiences force when held in a magnetic field at right angles to it?
  53. physics

    Resultant displacement from 12m east to5m north to9m vertically upward
  54. physics

    a projectile is fired at an angle of 60 degrees with the horizontal and with the initital velocity of 80 m/s. What is the time of flight?
  55. physics

    A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water true or false
  56. Physics

    Calculate the resistance of a 900 watt toaster operating at 120 volts. Which formula do you use?
  57. physics

    How long will it take a 1030 W motor to lift a 330 kg piano to a sixth-story window 13.0 m above?
  58. Physics

    What coefficient of friction is required to stop a hockey puck sliding at 12.8 m/s initially over a distance of 66.5 m?
  59. Physics

    What is the partial pressure of water on a day when the temperature is 25C and the relative humidity is 33% P=___Pa
  60. physics

    in einstein's famous equation e=mc^2, describing the relationship between matter and energy, the units for E are m=====>kg, c=====>m/s a) kg m/s b)kg m/s^2 c) m^2/s^2 d)kg m^2/s^2 I think its either B or D but indecisive...
  61. physics

    Compute the electric field about a uniformly charged plane sheet using gauss law.
  62. college physics

    Calculate the angular speed of the moon if it makes a revolution around the earth in 27.3 days?
  63. Physics

    In general, what conditions with observable effects make magnets interact with non-magnet materials?
  64. Physics

    Calculate the skid-to-stop of a car travelling oa a road at 100km/h with a coefficient of friction of 0.68.
  65. physics

    if a race car's velocity increases from 4 m/s to 36 m/s over a 4 s time interval, its average acceleration would be 10 m/s 2 ? IS THIS TRUE ?
  66. Health Physics

    As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
  67. physics

    What is the volume of a metal which weighs 28g less in kerosene and the densty is 800 kgm3 than it does in air
  68. physics

    If you heat a thin circular ring in a oven, does the rings hole get larger or smaller.why?
  69. physics

    What is the number of the highest harmonic that could be heard by a person who is capable of hearing frequencies up to 1.00×104 ?
  70. physics

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

    Calculate the speed of sound wave in air if its frequencies and wavelengths are 256Hz and 1.32m
  72. physics

    if two forces 10N and 20N are inclined at angle 60degree to each other. Find the resultant force.
  73. physics

    Does the following represent a sample or a population? calories created while burning all of the coal taken from a rail car
  74. physics

    vector b has x,y, and z components of 4.0, 6.0, and 3.0 units, respectively. Calculate the magnitude of b and the angles that b makes with the coordinate axes.
  75. Physics

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

    Three resistors, 1.17, 2.84, and 3.65Ω, are connected in series across a 20.3-V battery. Find the power delivered to each resistor.
  77. physics

    Radio waves transmitted through space at 3.00¡¿10 8 m/s by the Voyager spacecraft have a wavelength of 0.120 m. What is their frequency?
  78. Physics

    An elevator is moving upward at 0.97 m/s when it experiences an acceleration 0.34 m/s 2 downward, over a distance of 0.80 m. What will its final velocity be?
  79. 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.
  80. Physics

    An airplane is flying at an altitude of 2,000 m with a speed of 216 m/s. What is the pressure of air outside the plane?
  81. physics

    If the sun's mass is about average, how many stars are there in the Milky Way galaxy? (This is all the information given in the question and I don't know where to go from here).
  82. physics

    Three resistors, 1.17, 2.84, and 3.65Ω, are connected in series across a 20.3-V battery. Find the power delivered to each resistor.
  83. Physics

    A 1200 kg sports car accelerates from 0m/s to 27m/s in 10s. What is the average power of the engine?
  84. science (physics)

    A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
  85. physics

    How high will an object rise if it is projected upward at a 45 degree angle and an initial velocity of 50 m/s?
  86. math in physics

    find the force if f between charges of 100mc -50mc located 50cm a part?
  87. science (physics)

    A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
  88. physics

    A boy sledding down a hill accelerates at 1.20 m/s2. If he started from rest, in what distance would he reach a speed of 7.00 m/s?
  89. Physics

    Two positive charges of 0.2microC and 0.01 microC are placed 10cm apart. Calculate the work done in reducing their distance to 5 cm
  90. physics

    if the shortest lenght of the tube for resonance is 0.1m and next resonanc length is 0.35m what is the frequency of the vibration.
  91. physics

    What is the power delivered by a motor lifting an elevator weighing 1250kg up 89 floors at 16.8 meters per second
  92. college physics

    A cannonball shot at an angle of 60 Degrees had a range of 196m. What was its initial speed?
  93. PHYSICS

    A point source of a wave emits 195 watts. What is the intensity at a distance of 4.56 meters? I =
  94. physics

    a bus decreases its speed from 80kmh-1to 60kmh-1 in 5 sec find the acceleration
  95. physics

    A force of 291.0 N is used to push a 140 kg mass 30.0 m horizontally in 3.00 s. Calculate the power developed in kW.
  96. physics

    Find the field produced by a uniformly charged sheet carrying 93pC/cm2 .
  97. jru-physics

    what potential energy is acquired by a block of steel whose mass is 50 kg when it is raised 200 cm?
  98. physics

    What is the quantum particle of the electric field? Answer a. The proton. b. The electron. c. The photon. d. The neutron.
  99. physics

    What is quantity of heat required to melt down completely 1kg of ice at 30 degree celsius
  100. Physics

    A football is kicked at 15 m/s with an angle of 35 degrees with the ground. How long is it in the air? How far will it land? Can someone help plz... Thanks!