Physics!

74,730 results, page 41
  1. physics

    a sprinter runs 222yds in 25.2s find her average speed in yds/s
  2. physics

    'perpetual motion' is ruled out of the realm of possibility because of which law of thermodynamics?
  3. physics

    how do you compare mass and weight on the earth, moon, and outer space?
  4. Physics

    4. Find the magnitude of the force between two charges Q1 = 3µC, Q2 = 2.5µC that are 50mm apart.
  5. physics

    If a nuclide has a decay constant of 10^-6 s-1 what is its half life ??? I think it is 0.693 / 10^-6 = 693000 or 6.93 x 10^5 Is this right ...
  6. Science

    Name 3 physical (physics) occurances that happen within a roller coaster ride?
  7. 11th grade Physics

    How many current paths are there in a series circuit connection?
  8. physics

    What is the momentum of a proton travelling at v = 0.95c in the x-direction in the reference frame?
  9. Physics

    In the photoelectric effect, what happens to the stopping voltage when the light frequency is decreased?
  10. physics

    at what temprature is the average translational k.e of a molecule in an ideal gas equal to 1 ev?
  11. Physics

    How long is Mayra, a ballerina, in the air when she leaps straight up with a speed of 1.23 m/s?
  12. Physics

    How long is Mayra, a ballerina, in the air when she leaps striaght up with a speed of 1.23 m/s?
  13. physics

    if the piston is in thermal equilibrium but the it is pushed inward, can there be a change in temperature(increase) even if Q=o
  14. Physics

    A charge q1=7.8x10^-6 C is placed at the origin. q2=-3.4x10^-6 C is placed at y=-1 m, x=2 m. q3=-9.2x10^-6 C is placed at y=4 m. What is the total force on q1? On q3?
  15. Physics

    A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? Help me get this answer please.
  16. Physics

    A bicycle wheel of radius 0.2 m is spinning at a rate of 70 revolutions per minute.
  17. physics

    The speed of a car moving in a straight line increases every second. It goes from 30 km/hr (about 19 mi/hr) to 35 km/hr (about 22 mi/hr) in the first second. The next second, it goes from 35 km/hr to 40 km/hr (about 24.8 mi/hr). What is its acceleration?
  18. physics

    HOw much heait is needed to raise the temperature of 5 kg of water 5 degrees celsius
  19. Physics

    I need help really bad anyone good at this???? Name three different kinds of graphs that are often used to plot information and discuss the value of each.
  20. Physics

    A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? In rad.
  21. physics

    A 0.255kg rock is thrown with a speed of 12.0m/s.How much energy does it initally passess?
  22. physics

    A car accelerates from rest at 2.57 m/s2. What is the velocity at the end of 5.4 s? Answer in units of m/s
  23. PHYSICS

    EXPLAIN FRICTION AT RIGID SUPPORT OF A PENDULUM SUSPENDED USING A STRING.
  24. Physics

    A 68-g ice cube at 0°C is placed in 796 g of water at 30°C. What is the final temperature of the mixture?
  25. Physics

    A dancer completes 3.8 revolutions in a pirouette. What is her angular displacement? In Rad.
  26. Physics

    can anyone give a site that have problems about pressure with solution.. urgently needed.. thanks :)
  27. physics

    determine the pressure of a 20 lb force is applied to an area of 10 inch squared
  28. physics

    what law is it when gravity pushes down on a rocket that is accelerating at a rate of 270 km/h
  29. PHYSICS

    What is the force of attraction between two masses 5kg and 8kg at a distance of 60cm apart.
  30. physics

    A proton is confined to a nucleus of radius 5 FM.what's the minimum uncertainty in momentum?
  31. physics

    a 50 kg person has a weight of 80 N on the surface of the moon what is the acceleration due to gravity
  32. Physics

    What angle should you rotate a mirror so that a reflected ray rotates through 28 degrees. I got 20, but i am not sure, please help
  33. physics

    What is the apparent weight of a lead brick 2.0 in x 2.0 in x 8.0 in if placed in oil with density p=0.93 g/cm^3 (Ppb=11.4 g/cm^3)(1 in. = 2.54 cm)
  34. physics 101

    explain rocket propulsion in terms of conservation of momentum
  35. physics

    draw the following position vectors, find the displacement and present it on diagram. di=2 m df=5m di=3m df= -4m
  36. Physics

    a football is kicked in 36 meter per second and 30 degree angle with land.After 1 second,how much it's velocity will ?
  37. physics

    what is the pressure exerted on the ground by a cube which has a weight of 600n and a side of 1m
  38. physics please help

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

    How does pressure work as a restoring force to create a sound wave?
  40. Science(physics)

    A stone falls from rest for 8.0 second. a.)Calculate the stones velocity after 8.o second
  41. physics

    a car moving through road what is the direction of force and surface of acting
  42. physics

    What is the electric field intensity of a point 15cm from a charge 15microcoulomb
  43. physics

    a ball is thrown up vertically and caught at 9.3 sec. what is the intial velocity
  44. physics

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

    How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
  46. Physics

    If you must stop your moving car in a hurry, should you slam on the brakes and lock them?
  47. physics

    A 9.1-µF and a 6.8-µF capacitor are each charged to 2.5 multiplied by 10-4 C. Which has the larger electric potential difference?
  48. Physics

    Runners in the 100-m dash use starting blocks. Explain what this device does. PLEASE HELP.
  49. physics

    What is the wavelength of the higher frequency limit (18 megahertz) in dry air at 0 C?
  50. physics

    why is it harder to maintain costant accleration rather than cosntant velocity when walking
  51. physics

    A tire rotates 140 rpm, how many rotations have been completed in 20 seconds?
  52. physics

    a bag weighing 9.4kg is dropped 1m onto concrete, what is the impact force in kg
  53. physics

    How much time will elapse between seeing lightening and hearing the thunder happening 8000 m from you?
  54. physics

    What factors directly affect how much air drag an object experiences?
  55. Physics

    How fast would you need to be travelling relative to an observer in order for them to see a 15% increase in your mass?
  56. physics

    A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .
  57. physics

    A rock is dropped from a 196-m-high cliff. How long does it take to fall (a) the first 98.0 m and (b) the second 98.0 m?
  58. physics

    how do you find the verticle component of velocity of a projectile just as it strikes the ground?
  59. Physics

    What would the experimental value of g be if the slope of the graph represents 1/2 g and the equation is y=5.00x-.0109639087
  60. physics

    You have exactly 1 L of ethyl alcohol at room temperature 23 C. You put it in a refrigerator at 4 C.What's its new volume?
  61. physics

    A dart is thrown horizontally toward X at 30 m/s as shown. It hits Y 0.29 s later. The distance XY in centimeters is:
  62. physics

    If 1g of steam is mixed wid 1g of ice, then what will be the resultant temperature of the mixture?
  63. physics

    Explain how the specific heats of materials are measured using the technique of calorimetry.
  64. physics

    a 15 kg bucket is raised to paint a ladder with an acceleration of 3 m/s.^2 what is the tension in the rope?
  65. Physics

    A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
  66. Physics

    A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
  67. physics

    Explain how the pitch of the roaring sound relates to the length of the tube.
  68. Physics

    How much power is required to move a 1500 kg elevator at a constant velocity of 2.5m/s.
  69. physics

    Why is it vital that there is friction thatb opposes motion when two surfaces try to slide across one another?
  70. physics

    You are driving a car with a power output of 56,000 Watts. How many seconds will it take to go from 0 m/s to 27 m/s?
  71. physics

    A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water.
  72. physics

    an automobile travels at a uniform speed of 88 kph. how many metres does it travel in 1 second?
  73. Physics

    If two resistors are connected in parallel, I know that they share the same voltage but how would you determine their current?
  74. Physics

    What electric field strength would store 17.5J of energy in every 9.00mm3 of space?
  75. Physics

    If a car delivers 76.2 hp of power, how much time will it take for the engine to do 5.78e5 J of work?
  76. Physics

    How many meters does a bug fly in 1120 seconds if it travels at 1 cm/sec.?
  77. Physics

    if the frequency of a particular electromagnetic wave is 4 x 10^14 hertz, what is its wavelength of the radiation in nanometers (nm)?
  78. Physics

    A potter's wheel rotates with an angular frequency of 1.54 rad/s. What is its period?
  79. Physics

    How do I find the recoil velocity of the earth immediately after the popper popped?
  80. Physics

    What is the resistance of a 4.00 m length of copper wire having a diameter of 2.00 mm at a temperature of 20 degrees?
  81. Physics

    What’s the specific heat of a material if it takes 6.5 kJ to increase the temperature of a 1.8 kg sample by 6.4 ∘C ?
  82. physics

    When an object travelling at 12.7 m/s [E] speeds up to a velocity of 21.5 m/s [E] in 3.45 s, the magnitude of the acceleration is __________m/s2.
  83. Physics

    What is a node? i'm supposed to label the nodes in a diagram of a wave but i can't find it anywhere
  84. physics

    The time required for a car to reach 28.5 m/s from rest, accelerating at 3.70 m/s2 is __________ .
  85. physics

    A carton of juice remains intact even after you have sucked out all the drink from it. please explain
  86. physics

    Can a metal sphere of radius 1cm hold a charge of 1coloumb
  87. 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.
  88. Physics

    What is the wavelength of radio waves of frequency 1400 kHz? (a) 42.9 (b) 214 (c) 42.9 (d) 3*10^8
  89. physics

    The acceleration of a certain rocket is given by a=bt where b is positive cnstant, find the position function Xo and Vo at t=o?
  90. physics

    what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?
  91. physics

    can anyone give me a site that "best explains" about Rotational motion/Angular. thanks a lot.. :)
  92. physics

    An object is thrown vertically upward with a speed of 19.1 m/s. How high does it rise?
  93. Physics

    A body of mass m moves under the influence of force F(r). Given it's trayectory r(t), find F(r).
  94. physics

    how the frequency of sound produced will change in an aluminium string of 15 cm length
  95. physics

    a suitcase weighs 30 kg wt.everytime i weigh it on a spring balance,the reading is different.WHY?
  96. physics ! HELP PLEASE !!!!1

    what are the methods of computing the veolicty of a particle in one- dimensona motion from a graph ?
  97. Grade 11 Physics

    Rearrange the equation : d=v2t - 1/2at(squared) to solve for a
  98. Physics

    show that the oscillation of a liquid in a u-tube is in simple harmonic motion.
  99. physics

    A sports car accelerates from rest to 86km/h\, km/h in 5.2s\, s . What is its average acceleration in m/s2{\rm{m/s}}^2.
  100. physics 105

    How many cubic feet will 44lb of CO2 occupy at STP