Physics!

74,459 results, page 58

  1. Physics

    Where does it takes less time to boils eggs: in a pan of boiling water or in a pressure cooker?
  2. Physics (fix)

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

    Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.
  4. Physics Classical Mechanics

    Hi Enjoy, Thanks. I got the acceleration right and the Force wrong. Need help on Question 2.
  5. Physics

    Two organ pipes are imitating a sound of 12 Hz, one of them is 12 m long. What is the length of the other pipe?
  6. Physics 221

    How much charge flows through a 12 –V battery when a 2.0 mF capacitor is connected across its terminals?
  7. physics

    Under what circumstances does a double convex lens produce an image that is reversed left to right?
  8. physics

    Suppore the ceiling in the previous problem is that of an elevator which is going up with an acceleration of 2.0 m/s square. Find the elongations.
  9. physics

    list three factors that we must always give when exprassing a force vector quantity
  10. physics

    How much force is needed to accelerate a 125 kg block up a 35 degree include at 3.4 m/s2 if the coefficient of friction is 0.28?
  11. physics

    is this right?if 5.0m/s^2=6.0m/s-0/1.2s a=fn/m 5.0m/s=15.0N/3kg show that the 5.0m/s^2 acceleration can result from a net force of 15N exerted on a 3.ok cart
  12. Physics

    Two spheres with masses of 5.00 g and 10. kg respectively are .500 m apart. calculate the force of attraction between them.
  13. Physics

    If the period of the moon were 31 days while its orbit radius 3.8x10^8m, what would the mass of the Earth be?
  14. PHYSICS

    A girl rows 10 km downstream in 2 h. Her return trip takes 4 h. How fast can she row in still water. in km/h?
  15. Physics

    Find the uniform acceleration that causes's a car's velocity to change from 39.7 m/s to 74.0 m/s in an 5 second period of time.
  16. Physics

    A 1250 kg car travelling at 60.0 km/h comes to a sudden stop in 35 m. What is the coefficient of friction acting on the brakes?
  17. Physics

    A satellite that is 4175 miles from the center of the earth, orbits with a period of 90 minutes. What is its centripetal acceleration?
  18. physics

    If a cart is initially travelling at 3.5 m/s, and has a mass of 200g, what is it's kinetic energy (LEAVE OUT units of J)?
  19. physics

    What is the momentum of the 200 g cart BEFORE the collision (LEAVE OUT units of kgm/s)? please help.
  20. physics

    Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help
  21. Physics

    What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?
  22. Help!! Physics

    What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?
  23. physics

    a 1000 kg sports car accelerates from 0-30 m/s in 5.0 s. What is tge average power delivered by the automobile engine?
  24. physics

    show that the acceleration is 7.5 m/s² for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4s
  25. physics

    Is there a way to calculate the moment of inertia of a hanging mass (3.1 kg) without length & width dimensions?
  26. physics

    Show that the acceleration is 7.5 m/s2 for a ball that starts from rest and rolls down a ramp and gains a speed of 30 m/s in 4 s
  27. 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?
  28. 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?
  29. Physics/ Chem

    Find the entropy change when 51g of steam condenses to water at 100 ∘C.
  30. physics

    Why electric dipole moment between two charges points from negative to positive charge.
  31. Physics

    If a car engine has a power,P. Write an expression for the time it will take to accelerate from w to 4w. Note that P=wt where t is torque.
  32. physics

    if 20g of steam at 100 c is mixed into 80 g of water at 20 c what is the final temperature if no heat lost
  33. physics

    What is the total internal kinetic energy of 16.2 moles of a monatomic ideal gas at a temperature of 279 K? KE =
  34. physics

    A proton is suspended at rest in a uniform field E.Take into account gravity and determine E.
  35. physics

    what is the heat required to convert 0.1 kg of melting ice into steam at 100 degree celcius
  36. Physics questoin

    A satellite has an orbital radius of 3.74x10^7 m. If it has a period of 49776 seconds, what is the mass of the planet?
  37. physics

    two forces of magnitude 8N making an angle of 30 and 120 with +xaxis . FInd the y component of reultant
  38. PHYSICS

    two forces of magnitude 8N making an angle of 30 and 120 with xaxis . the y component of resultant A/ O B/ 4N C/ 8N D/ 16N
  39. Physics HELP ME PLEASE

    A 1250 kg car increases it's speed from 11 m/s to 27 m/s in 5.4 s. - What is the cars acceleration? - How much force is required?
  40. Physics

    Which of the following is an appropriate measure of electric power on a toaster label? A. 110 V B. 2.0 A C. 220 W D. 55 Ω
  41. Physics

    Calculate the tension in the cable connecting the two masses. Assume all surfaces are frictionless.
  42. PHYSICS

    'if diametre of earth is reduced to half mass remains constant what is then duration of day and night'
  43. Physics

    A person with a mass of 55kg climbs a tower with a height of 11m in 25 minutes. What power is produced?
  44. physics

    Find the total displacement of a body in 8seconds starting from rest with an acceleration of 2cm/sec2
  45. Physics

    all electric field lines start on positive charges. explain why this makes sense.
  46. physics

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

    Written in scientific notation, with three significant digits, the number 0.01050 is_______?______ x 10?
  48. science (physics)

    A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
  49. science (physics)

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

    An astronaut in a spaceship is listening to his music. Calculate the time it takes to play a 4.00 minute song at 0.1c
  51. college physics

    Calculate the angular speed of the moon if it makes a revolution around the earth in 27.3 days?
  52. 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?
  53. physics

    according to the statement given what is the magnitude of the velocity of the rock just before it strikes the ground
  54. physics

    Liquids exert pressure at Right Angles to the surface of container.Please explain this with an example
  55. Physics

    What is the gravitational force between a proton and an electron in a hydrogen atom if they are separated by distance of 5.29x10^-9 cm.
  56. Physics

    What is the gravitational force between a proton and an electron in a hydrogen atom if they are separated by a distance of 5.29x10^-9 cm
  57. physics

    What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 0.84 ± 0.04m ?
  58. physics

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

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

    Show that the motion of a particle in a central force field is always confined to a plane.
  61. physics

    A current of 1 A is maintained in a simple circuit with a total resistance of 2.5 Ω. How much heat is generated in 4.0 s?
  62. physics

    The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
  63. physics

    The resistivity of silver is 1.59 × 10-8 Ω·m. What is the resistance of a section of 12 gauge wire (diameter 0.2057 cm) that is 8.60 m long?
  64. physics

    A square conducting slab with 7 m sides carries a net charge of 89 mu or micro CC. what is the electric field?
  65. physics

    the angle between two forces of 32 AND (neutrons) and 47 N is 36 degrees. Find the magnitude of the resultant force
  66. Physics

    Find the pressure exerted by a waterbed with dimensions of 2 m x 2 m which is 30 cm thick. (hint: use density of water)
  67. Physics

    A proton with a kinetic energy of 4.7×10−16J moves perpendicular to a magnetic field of 0.25T .
  68. physics

    If one walks straight up a 10 degree incline, what is the height achieved after walking 10 kilometers ?
  69. physics

    If a 1500 kg car stopped from an in 5.6 seconds with an applied force of 5000 N, how fast was it initially traveling?
  70. physics

    Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.
  71. Physics help please

    Calculate the allowed wavelengths for the emission of a photon initially in the n=3 state in a hydrogen atom
  72. Physics, Help!! URGENT!!!

    A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?
  73. physics

    A meteoroid is speeding through the atmosphere, traveling east at 15.5 km/s while descending at a rate of 10.6 km/s. What is its speed, in km/s?
  74. physics

    An 80 kg skateboarder going 10 m / s is launched nearly vertically off a ramp as shown. Approximately how high does he go?
  75. physics

    a fire hose held near the ground shoots water at a speed of 6.4m/s, at what angle should
  76. Physics

    Katie kicks a football at a 52 degree angle and a velocity of 31 m/s. At what times will it be 10 meters off the ground?
  77. physics

    A aluminum wire has a diameter and uniform electric field of imposed along its entire length
  78. physics

    A crate is given an initial speed of 5.0m/s up the 22.5∘ plane shown in (Figure 1) . Assume μk = 0.12.
  79. Physics

    You swing a 2.40kg stone in a circle, using the full length of a thin 60.0cm rope.
  80. Physics

    Determine Centripetal Acceleration acting on the person standing at the equator? (the radius of earth is given)
  81. physics

    How fast will a roller coaster, with a mass of 1200 kg, be moving at the bottom of an 18 meter tall hill?
  82. Physics

    Explain how you would determine how much error there is between a vector addition and the real results.
  83. Physics Science

    How many kilocalories of heat are required to melt 20.0 kg of ice at 0°C? Okay so the given is m=20.0kg Ti=0°C HeatFusionIce=80 kcal/kg
  84. physics

    Find the radius of a spherical asteroid that has a density of 4600 kg/m3 and an acceleration due to gravity of 0.11 m/s2 at the surface. km
  85. physics

    How much heat (in kJ) will it take to bring 56 kg of ice at -8°C to dry steam? Answer to 3 significant figures
  86. ap physics

    a 37.4-kg traffic light is supported by two wires prove you answer applying newtons law
  87. physics

    Fall time under g is sqrt 2h/g. Can someone give a derivation from the equations of motion please? Thanks.
  88. So what about this one bob? Physics

    Which of the following is closer to a guess? hypothesis<<<<< law question theory
  89. physics

    A ball strikes against the floor and returns with double velocity.In which type of collision is it possible?
  90. Physics

    How much force is required to accelerate a 1500kg car to a speed of 17m/s in a distance of 45m? Thank you.
  91. physics

    a horse pull a barge with a force at an angle of 30¡ã to the horizontal for a distance of 20km . find the work done.
  92. physics

    An ambulance is going away from me @ 40mph with a siren @ 1000Hz.Will I heat a higher or lower frequency
  93. physics please help

    the potential difference across a load is 9V. explain what this means in more fundamental terms.
  94. Physics

    A 50 cm diameter wheel rotates through 25 radians. How do I figure out the amount of distance it will move?
  95. physics

    Can the gravitational potential energy of a baseball ever be negative? Yes No Explain without using a formula.
  96. Physics

    A weight suspended from a spring is seen to bob up and down over a distance of 11 cm twice each second.
  97. physics

    An object falls a distance h from rest. If it travels 0.45h in the last 1.00 s, find the time and the height of its fall.
  98. physics

    would someone in a lift feel lighter or heavier as it accelerated upwards? explain your answer.
  99. physics

    a tsunami originating in japan has a wavelength of 10^5 m and a period of 10 mins. how long does it take to travel 8000km?
  100. Physics

    What is the maximum total force exerted on a 71 kg astronaut by her seat during the launch of the Space Shuttle?
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