214,834 results, page 65

  1. physics

    Explain the statement: the saturation vapour pressure of water at 60 degree Celsius is 149.4 mm of Mercury. Thanks
  2. Physics

    Identify the correct neutrino (Ve, Vµ, Vτ or their anti-particles) a) π+ —> p° + e+ + v b) π+ —> p° + µ+ + v c) τ+ —> e- + v + v Please explain why too...I'm really lost. I'd appreciate any help.
  3. Physics

    Identify the correct neutrino (Ve, Vµ, Vτ or their anti-particles) a) π+ —> p° + e+ + v b) π+ —> p° + µ+ + v c) τ+ —> e- + v + v Please explain why too...I'm really lost. I'd appreciate any help.
  4. physics

    Two insulating spheres with charges of -7.0 μC and -12 μC, are located 10.0 cm apart. What is the force between them? In what direction does it act?
  5. Newtonian physics

    Over time, non-specialists are usually able to assimilate radically new scientific ideas, even though these ideas may seem strange when they are initially introduced. Such was the case with Newtonian physics; when Newton proposed his ideas regarding motion and gravitation in ...
  6. physics/ math

    A student bikes to school by traveling first d_N = 1.10 {miles} north, then d_W = 0.500{miles} west, and finally d_S = 0.200 {miles} south. You will now find the same quantity algebraically, without the need to use much geometry. Take the north direction as the positive y ...
  7. Math/Physics

    A car of mass 0.9 tonnes is driven 200 m up a slope inclined at 5° to the horizontal. There is a resistance force of 100 N. (i) Find the work done by the car against gravity. (ii) Find the work done against the resistance force. (iii) If the car slows down from 12 m s− 1 to...
  8. math(help)

    please help me and answers these i feel clueless!with this math 2.If Nell works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday, how much time will she work altogether? A.9/14 hour B.9/20 hour C.1 7/20 hour D.1 7/10 --------------------------- 3.eric eats 1/6 of an ...
  9. Physics

    This is a very confusing problem, I had never taken physics before and it is going to kill my GPA. can someone please help me solve this problem. I have a quiz coming up. Thanks for the help. The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 137...
  10. physics

    When there is no air resistance objects with different masses fall with....... A. equal accelerations and different displacements B. equal accelerations and similar displacements C. different accelerations and similar displacements D. different accelerations and displacements ...
  11. Math

    Math Question = an aquarium holds 6 and 1/4 gallons of water. the water level dropped to 4/5 of this amount .how much water should be added to fill the aquarium Above is my son's math question and we can't figure out how to solve it. The possible answers are: 74 and 1/2 / 10 ...
  12. Film and Physics

    I am doing a paper that entails my knowledge of physics to prove errors in the movie Transformers. There is one scene in the movie where Shia (Sam, the hero) falls in Optimus Prime's hand, from around 20 stories high. Obviously Sam should ooze out of Prime's hand, but of ...
  13. Math

    This is quite confusing... I'm helping someone with math. They have a problem, -4^2, and the people we're both talking to can't agree on whether it's -16 or 16. Google returns -16, my calculator returns 16. Google, however, changes it to -(4^2). I figured it was 16 since -4...
  14. Physics please clarify

    Posted by Mary on Monday, September 3, 2007 at 12:40pm. download mp3 free instrumental remix A charge of +2q is fixed to one corner of a square, while a charge of -3q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center...
  15. Math Please Check!!

    Please check my answer to see if I got it right. Thanks. Braden has 1 hour of math homework to do. He spends 2/5 of this time complaining about how much he hates math, 1/3 of the total time looking for his calculator. How much time does Braden actually work on his math ...
  16. math

    Ben can complete 3 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete 15 math problems?
  17. math

    Ben can complete 3 math problems in 21 minutes. If he continues working at the same rate, how long will it take Ben to complete 16 math problems? thanks .
  18. math

    Ben can complete 4 math problems in 20 minutes. If he continues working at the same rate, how long will it take Ben to complete 17 math problems?
  19. Math

    Valerie soent 32% study time on math and science. Math @ 3 hrs and Science at 5 hrs. How much time spent on studying subjects?
  20. math

    In an examination 70 student failled in math¡A90failed in science and 20 failed in both. if 80 student passed in math using venn-daigram¡A find how mamy student were passed in both subject¡H
  21. English

    What's your favorite class? 1. It's a math class. 2. It's math class. 3. It's math classes. 4. Math class is my favorite. 5. Math classes are my favorite. 6. A math class is my favorite. (Which answers are correct? Are all correct?)
  22. Physics

    This is based off of the paper "Scaling -- The Physics of Lilliput", but I think the following questions can be answered out of context: 1. Based on the Lilliputian reading: A) A rectangular water tank is supported above the ground by 4 pillars 5.0 cm long whose diameters are ...
  23. Math

    If a teacher allows 5/6 of an hour to be spent on homework and she allow 1/3 of that time to be spent on math, how much time will be spent on math?
  24. Physics

    The 3.25 kg physics book shown is connected by a string to a 472.0 g coffee cup. The book is given a push up the slope and released with a speed of 3.79 m/s. The coefficients of friction are μs = 0.595 and μk = 0.241. What is the acceleration of the book if the slope...
  25. Physics

    A space station, in the form of a wheel 197 m in diameter, rotates to provide an “artificial gravity” of 2.5 m/s2 for persons who walk around on the inner wall of the outer rim. The rate of the wheel’s rotation in revolutions per minute that will produce this effect is ...
  26. physics

    Your physics teacher drives an ideal frictionless car of mass 1000 kg which coasts along the level road to his home at a constant speed of 48 km/h with the engine turned off. It then coasts 40 m up his sloping driveway and comes to rest at the top without any braking required...
  27. Atomic physics

    5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. b. Calculate the wavelength of light emitted with the shortest possible ...

    pete and john play a game of tug f war on a frictionless icy curface. pete weighs 539 N and john weights 392 N. during the course of the game, john accelerates toward pete at a rate of 3 m/s^2 a)what's the magnitude of the force that peter exerts on john? b)what's the ...
  29. physics (pendulums)

    i understand the PE and KE and MKE points and how gravity effects a pendulum, but how does kenetic and potential energy effect it?
  30. more physics

    in the equation P= 2m/ ne^2 t what do these symbols mean? p - resistor m - mass of e- n - ?? e - electron charge>?? t - time between collisions??

  32. physics...please check my answer...

    4.A mass of one kg of nickels has a monetary value in the US $ of approximately: a. $1 b. 10 cents c. $10 d. $1000 is it c?
  33. physics Again

    bobpursley can you please check my reply to your post about my question? I am not sure if I did my equation correctly. Thanks
  34. physics

    Could someone tell me if this is right? The voltage across a 10-ohm resistor carrying 3 amps must be E=I*R == E=3*10= 30 volts
  35. Physics

    Is the answer to this 4? If the filament resistance in an automobile headlamp is 3 ohms, how many amps does it draw when connected to a 12-volt battery?
  36. Physics

    I have a 1000 ohm resistor with a measured resistance of .967 how do I use submultiples or mutliples to get it in the SI units?
  37. Physics

    Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characteristic radiation characteristics?
  38. 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!
  39. physics

    A positive and a negative charge, each of magnitude 1.7 10-5 C, are separated by a distance of 11 cm. Find the force on each of the particles. what formula do i use?
  40. physics

    how much kinetic energy will an electron gain in J and eV if it accelerates through a potential difference of 23,000 volts
  41. physics

    you chop 50 g of ice at 0 degrees celsius into 200g of water at 40 degress celcius. What is the final temperature?
  42. physics

    The automobile is originally at rest at s = 0. If its speed is increased by dv/dt = (0.05t2)ft/s2, where t is in seconds, determine magnitudes of its velocity and acceleration when t = 18 s.
  43. physics repost

    A 1.00-kg ball is attached to a string of 0.50 m and swung in a horizontal circle with a velocity of 2.00 m/s. Find the centripetal acceleration. ac=v^2/r = 2.00^2/.50 = 8.0 m/s^2
  44. Physics

    The discreteness of the energy levels of electrons about the atomic nucleus is best understood by considering the electron to be a .....?
  45. Physics

    How does Rutherford's model of the atom account for the back-scattering of alpha particles directed at the gold foil?
  46. Physics

    If a pair of carbon atoms were fused, and the product were to emit a beta particle, what element would be produced?
  47. Physics

    List at least two major potential asvantages of power production by fusion rather than by fission.
  48. Physics

    The position of some object moving along the x-axis is observed to be x(t)=9cos(pi*t/3+pi/4) meters. Find the frequency.
  49. physics

    A lamp operates with a current of 0.625A and a potential difference of 120V. What is the currnt flowing through the microwave?
  50. physics

    Calculate the energy released in the fusion reaction 2 3 4 1 1 H + 1 H->2 H +0 n. The atomic mass of 3 1 H (tritium is 3.016049 u. I am lost! help please!
  51. science

    which physics principles are employed in stopping a runaway truck in a gravel and sand ramp at the bottom of a mountain?
  52. Physics

    What happens when you plug more equipment into apower board in terms of it's resistance and current. Explain.
  53. physics

    Charge polarization is normally produced by: nuclear interactions. contact. induction. friction. electrostatic means.
  54. Physics

    1. What constant acceleration, in SI units, must a car have to go from zero to 69.0 mph in 13.0s ? 2. What fraction of g is this? (the unit for this answer is % of g)
  55. 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.
  56. Physics

    What is the acceleration of a skateboard down a ramp inclined at 19.5 degrees to the horizontal? 3.271 is the answer. This shouldn't be too tough, but I can't get it. Thanks!
  57. Physics

    calculate the magnitude of the resultant of a pair of 100-km/h velocity vectors that are at right angles to each other. Please help me! thanks!
  58. physics

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

    A 100-n boulder is sitting on a shelf 0.5 meters above the floor. What is the potential energy when its in its new location?
  60. 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?
  61. physics please help.

    how do you measure uncertainy?? for instance.. if the average was .15 and the highest value among the data was .16 and the lowest is .13... how do you find the +-??
  62. Physics

    How many times will the incident beam shown in Figure P25.3 (x = 1.90 m, y = 1.30 m) be reflected by each of the parallel mirrors? mirror on the right
  63. physics

    you slide down a pole at a mass of 80kg with an acceleration of 4m/s^2, How do you show that the friction force that acts on you is 480N?
  64. physics

    Why is it better to put ince rather than an equal mass of cold water into a drink you want to chill?
  65. physics

    Why is it better to put ince rather than an equal mass of cold water into a drink you want to chill?
  66. Physics

    If you take a bite of pizza, the sauce may burn your mouth while the curst, as the same temperature will not. Explain.
  67. Physics

    Ok why would it be necessary for someone to measure oscillations from a 20 cm mark of a suspended ruler as oppose to the center of mass?
  68. physics

    Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 4 rev/s. Answer should be in units of m/s Thanks
  69. physics

    express the answer in scientific notation with the correct number of significant figures (8.86+1.0*10^-3) / 3.610*10^-3 2454.57??? please help
  70. Physics

    Explain why the mass of the vehicle does not affect the calculated maximum or minimum velocities for cars on banked curves.
  71. Another physics question...

    Deduce the electric field strenght at a point midway between charges of 7.2*10^-6 C and -3.4*10^-6 C that are 2.0m apart from air. Thank you!
  72. physics

    You are driving south on a highway. Then, without changing speed, you round a curve and drive west. Do you accelerate?
  73. physics

    Two uniform spheres , each of mass M and radius R, touch one another. What is the magnitude of their gravitational force of attraction?
  74. physics

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

    What is the weight in newtons of a 250 g package of cereal? need answer and work shown asap! plz and thank u!
  76. physics

    The diameter of the earth is about 7.6 x 10^3 miles. What is the linear velocity of a person, on the equator, in feet per second?
  77. Physics

    It takes you 9.5min to walk with an average velocity of 1m/s to the north from the bus stop to the museum entrance. What is your displacement?
  78. physics

    How far to the nearest meter can a sprinter running at 9 m/s, travel in the time it takes a rock to fall 28 meters
  79. physics

    Calculate the speed of a satellite moving in a stable circular orbit about the Earth at a height of 5400km.
  80. physics

    How does one go about solving this? A skateboard rider starts from rest and accelerates at a constant +.50 m/s^2 for 8.4s. What is the riders displacement?
  81. Physics urgent

    What is the weight of a 76 kg astronaut on the Moon where the value of 'g' is only 17% the strength of 'g' on the Earth? (Answer should be expressed in N).
  82. physics

    What minimum speed does a 150g puck need to make it to the top of a 3.6m -long, 23 degree frictionless ramp?
  83. physics

    An elevator weighing 2400 N ascends at a constant speed of 5.0 m/s. How much power must the motor supply to do this?
  84. physics

    How long will it take a 1920 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
  85. Physics

    A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg
  86. physics

    A flashlight that is powered by 12 Volts and uses a bulb with a resistance of 90 Omega will have a current _________________ Amps.
  87. Physics

    Is it possible for the frictional force to increase the mechanical energy of a system? If so, give 2 examples with brief explanations. If not, why not?
  88. physics

    what minimum speed does a 100g puck need to make it to the top of a 3m long 20degree frictionless ramp?
  89. Physics

    Describe alpha, beta, and gamma rays. What exactly is each ray composed of? What are their characeristic radiation characteristics?
  90. Physics

    To suck water up a straw to a maximum height of 98 mm, what minimum gauge pressure must be produced in the lungs?
  91. Physics

    A baseball has a mass of 0.15 kg. A pitcher throws a 40 m/sec fastball which is caught by the catcher. What is the change in momentum of the ball?
  92. physics

    If an object is hung from a cable with a weight of 40 N, what is the tension in the two cables? I got T1=21.23N and T2=18.77 but I don't know if I am doing these problems correctly...
  93. physics

    A broom handle has a length of 1.67m and a mass of 580g with the axis rotation through the center. (what is this problem asking me to do?)
  94. Physics

    A weightlifter raises a 90k-g barbell from the floor to a height of 2/2 m in 0.6 s. What was his average power output during the life?
  95. physics

    If an arrow is fired at 200km/h horizontally, about how long will it take to strike a target 30 meters away?
  96. Health Physics

    As one exhales, what change in energy takes place between the diaphragm and the air in the lungs?
  97. Health Physics

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

    The force applied by the e-brake is F(eb) = m*a(eb) = -8.13*1452 = -12,100 N I didn't get the same answer - I got 11,804.76....please check
  99. physics calc based

    In the product F = qB (vectors), take q = 2 (neglecting the units of charge, q) and v = 2.0 i + 4.0 j + 6.0 k and F = 4.0 i + (-20 j) + 12 k . What then is B in unit-vector notation if Bx=By ?
  100. Physics

    Find the slope of the line that is tangent to the given function’s graph for the specified value of the independent variable. f(x) = 9x – 8; x=10.
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