Math/Physics

214,413 results, page 40

  1. physics

    What is meant by the statement that the specific latent heat of steam is 2260000jkg
  2. physics

    Explain why ice is formed on the aluminium lumps and not on the walls of the beaker
  3. Quantum Physics

    Calculate the transition ratio between the 2P-1S and 3P-2S states of the hydrogen.
  4. Stats

    About 10% of the population of a large country is math phobic. If two people are randomly selected what is the probability both are math phobic? And hat is the probability that at least one is math phobic? Any way to do this on stat crunch?
  5. Physics

    PLEASE HELP! I'm doing a physics demonstration, and in part of it I'm trying to explain why steel wool burns and normal steel doesn't. I know it's something to do with the smaller surface area and/or mass but I don't know WHY it burns because of this. Can anyone help me? I'm ...
  6. physics

    How do i go about this question? Suppose a car is traveling at 20.0m/s, and the driver sees a traffic light turn red, After 0.530s has elapsed (the reaction time), the driver applies the brakes, and the car accelerates at 7.00m/s2. What is the stopping distance of the car, as ...
  7. Absolute and relative change

    In one region the number of students in Math 101 is 20% more than the number of students in Math 123. If there are 480 students in Math 101, how many students are in Math 123?
  8. physics

    An inquisitive physics student and mountain climber climbs a 50.0 m cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.08 m/s downward. (a) ...
  9. physics/math

    Three people are trying to hold a lion still for the vet. The lion, in the center, is wearing a collar with three ropes attached to it and each person has a hold of the rope. charlie is pulling in the direction of 62 degrees west of north with a force of 175 newtons. Sam is ...
  10. Math

    16.Eliot spent 24 minutes solving 8 math problems.At that rate, how many math problems can he solve in 54 minutes? a.12 B.16 C.18 D.24 A? Can you explain why it isnt a
  11. Physics

    Need Help with physics! Two cars drive on a straight highway. At time t = 0, car 1 passes mile marker 0 traveling due east with a speed of 17.0 m/s. At the same time, car 2 is 1.3 km east of mile marker 0 traveling at 30.0 m/s due west. Car 1 is speeding up with an ...
  12. Math

    Can somebody help me out here. I want to know why I am good with math problems but I don't get word problems until it is made out of a equation. The reason is that you have learned math as procedures and facts...math as a form of thinking, or analysis, hasn't sunk into your ...
  13. PLEASE HELP, physics/math

    Three people are trying to hold a lion still for the vet. The lion, in the center, is wearing a collar with three ropes attached to it and each person has a hold of the rope. charlie is pulling in the direction of 62 degrees west of north with a force of 175 newtons. Sam is ...
  14. Physics please check

    The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...
  15. physics- torque

    1. Find the magnitude of the torque produced by a 3.0 N force applied to a door at a perpendicular distance of 0.25 m from the hinge. 2. A simple pendulum consists of a 3.0 kg point mass hanging at the end of a 2.0 m long light string that is connected to a pivot point. a. ...
  16. physics hey bob

    you help me solve this problem. but how am i suppose to if i don't know the mass of the car? on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same automobile on a simalr road with the slope 1...
  17. Physics

    posted this question this morning but I'm not sure of the response Damon provided. I did it once but then I updated it later in this at the bottom- please check booth of my answers. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached...
  18. math

    Hello. I'd like to find free videos for math on the Internet? By using Youtube can I search math videos for elementary school students? Would you let me know a good way to use free videos about various subjects on-line. Thank you.
  19. physics

    We're in class with a SIL decibel meter up front, and everyone is screaming at the top of their lungs, hooting and shouting and pounding on their desks, shooting off firecrackers, its Phys 1240 gone wild...and the meter is reading a reasonably steady sound intensity level of ...
  20. Physics

    For the answer to the following post, do you mean that the frequency does not depend on the radius? Posted by Johnny on Saturday, March 13, 2010 at 5:49pm. The frequency of circular motion for a charged particle moving around in the presence of a uniform magnetic field does ...
  21. PHYSICS

    Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me. PHYSICS - drwls, Saturday, February 6, 2010 at 2:15pm To help you answer that question, I'd need a figure that shows what kind...
  22. math math math

    35 is what percent of 200
  23. English

    1. He helped Mother wash the dishes. 2. He helped Mother with the dishes. 3. He helped his brother study math. 4. He helped his brother with math. 5. He helped study math. 6. He helped with math. 7. He helped his brother study math. 8. He helped me study math. 9. He helped ...
  24. Physics. Urgent

    A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the block to a momentary...
  25. math

    Help! I am gettting a C in math and I am so cofussed! How do I study better but have fun while I do it? I love math, I take it as a game, I take the #'s and use their equations. I know you might not like problem solving q?, but try to get a tutor & I know u can do it. GOOD ...
  26. math fractions

    •math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math - bob, Sunday, November 16, 2014 at 12:56pm Ms. Sue can you tell me how you got that answer please. •math - Ms. Sue, Sunday, November 16, 2014 at 1:09pm Multiples of 6: 6, 12, 18, 24 Multiples of 4: 4, 8, 12...
  27. physics

    You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift force exactly balances...
  28. physics

    You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift force exactly balances...
  29. Physics

    A small circular object with mass m and radius r has a moment of inertia given by I = cmr2. The object rolls without slipping along the track shown in the figure. The track ends with a ramp of height R = 3.0 m that launches the object vertically. The object starts from a ...
  30. physics

    A physics professor is going ice skating for the first time. She has gotten herself into the middle of an ice rink and cannot figure out how to make the skates work. Every motion she makes simply cause her feet to slip on the ice and leaves her in the same place she started. ...
  31. Algebra 2

    Well I'm curently taking this class as a sophmore and have taken geometry freshmen year of high school and also I am taking physics at the same time and in math class when I'm asked to factor i go absolutley nuts because guessing numbers is just no my thing... I need solve for...
  32. Physics

    Hi guys, need help with this problem for physics and im having trouble visualizing it. Kathy and mountain climber climbs a 55.0 m cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. ...
  33. Physics

    Ammeter 1 reads 0.20 A. a. What should ammeter 3 indicate? b. What should ammeter 4 indicate? Given: RA = 22-OHM RB = 13-OHM A1 = 0.20 A Ammeter 2 reads 0.15A. a. Find the voltage across the 22-ohm resistor? b. Find the voltage across the 15-ohm resistor? c. What is the ...
  34. Physics

    If you have steel and wood at 0 Celsius, which is colder Both are the same temperature.
  35. Physics

    If the earth had no atmosphere, what would the color of the sky be during the day?
  36. Physics

    what is the angular speed, in rad/s, of a point on the surface of Jupiter at latitude 72 degrees N?
  37. physics

    why are the lengths of days in spring and autumn the same? if the sun does not set, why is it so cold?
  38. Physics

    When is your weight normal, higher, or lower while moving up and down in an elevator?
  39. Physics

    1. How can voltage be induced in a wire? Can someone help me figure out an answer to this? please
  40. Physics

    what must be the minimum velocity of a missile if it is strike a target a 100m away?
  41. physics

    Why will a magnet attract an ordinary nail or paper clips but not a wooden pencil?
  42. PHYSICS QUESTION!!!!

    how do you find the height or time? is it h=squreroot4.9/t or h=squareroott/4.9 or is it something else complettly???
  43. physics

    need the formula to find jupiters orbital period in earth years
  44. physics

    If,an,object,is,at,rest,there,must,be,no,force,acting,on,it.Is,this,statement,correct?,Explain!
  45. Physics

    A person with a mass of 85kg. How much in newtons do they weigh on the earth and the moon?
  46. Physics

    When you look at a distant galaxy through a telescope, how is it that you're looking backward in time?
  47. physics

    How much would a 60-kg person weight on the Moon where the gravitational field has a magnitude of 1.6 N/kg?
  48. physics

    How long does it take a car to travel 196 meters when accelerating at 8 m/s2 from rest?
  49. Physics

    Can we Connect two or more batteries of different voltage in parallel circuit?
  50. Physics

    Assume the utility rate to be $.20/kWh. What is the cost of purchasing 10kW for 1.0 hour?
  51. Physics

    Why is Young's experiment more effective with slits than with the pinholes he first used?
  52. physics

    Find the intensity level 10m from a 0.24 watt source of sound energy?
  53. Physics

    How can you use a curved mirror to make a telescope? If possible, if there a diagram somewhere?
  54. Physics

    Why does light striking a metal surface eject only electrons, not protons?
  55. Physics

    An electron and a proton are traveling at the same speed. Which one has the longer wavelength?
  56. Physics

    Find the length of a bridge if it is known that the steel in the roadbed expands by 0.52 m when the temperature changes from +2 to +30°C.
  57. Derivation of Physics Equation

    How do we derive these laws: (most of the time, the numbers are subscript) v'2 = v1 * ( (2 * m) / (m1 + m2) ) + v2 * ( (m2-m1) / (m1+m2) ) & v'1 = v1 * ( (m1-m2) / (m1+m2) ) + v2 * ( (2 * m2) / (m1 + m2) )
  58. physics/science

    i don't understand why radioactive waste is stored underground is it because it is a harmful substance
  59. Physics

    Which color light is the result of a greater energy transition, red or blue?
  60. Physics check

    The spectral lines for elements are sometimes called atomic..... spectra?
  61. Physics check

    Rank the following transitions in order of low to high frequencies: 3-2; 4-3; 2-1; 5-4; 5-3; 3-1; 4-2. 5-3; 4-2; 3-1; 5-4; 4-3; 3-2; 2-1 ?
  62. physics

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

    What are differences and similarities of the electric charges (+ and -) and the magnetic forces (North and South)?
  64. physics

    what is the maximum downward accelaration you can give your hand in m/s^2 i was thinking 10 due to gravity
  65. physics

    can anyone give me a site that would explain about torque and equilibrium.. thanks a lot.. :)
  66. physics

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

    why isn't it a good idea to spread salt on the road in really cold climates?
  68. physics

    If the density of a medium is 1000 kg/m3 and the propagation speed is 1540 m/s, the impedance is rayls.
  69. physics

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

    Describe the differences between the force of gravity and buoyant forces on a swimmer.
  71. physics

    why would you wear a white t shirt opposed to a blak one in winter
  72. gr.10 physics

    could someone please help me with this? Rearrange and simplify for r when A=3.14r^2 by the way, 3.14 is supposed to be pi, but i don't know how to write it...
  73. Physics

    Why is the momentum in a spaceship traveling in space not conserved? Can someone please explain? thanks
  74. Physics

    If the current in a wire is 0.1A, how long will it take for 10C of charge to pass through it?
  75. physics

    What is the R-factor of insulation and what does it equal? i have looked everywhere and can not seem to find it.
  76. Physics

    How can you prove that acceleration due to gravity is the same in a resting and moving frame?
  77. physics

    If a hair dryer is rated at 800W, how much energy does it require in 3 min?
  78. Physics

    KNOWNS: Diverging (convex) mirror Radius of curvature = 60 cm (f = 30 cm) M = 1/5 Hi = 20 cm UNKNOWNS: Ho? Di? Do? EQUATIONS: 1/Do + 1/Di = 1/f M = Hi/Ho = -Di/Do
  79. physics

    why is the color of the sky orange during sunrise and sunset? --pls help me on here-- thanks :)
  80. physics

    compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
  81. physics

    compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
  82. physics

    compare and contrast sound and electromagnetic waves in terms of types, speed, etc.
  83. Physics

    Does the axis system chosen affect the magnitude of potential energy? I say yes
  84. physics

    I have the energy and frequency of a light source and I need the wavelength and colour. What do I do?
  85. Physics

    An electromagnetic radiation has a frequency of 5.00 X 10^14 Hz. Calculate its wavelength in a vacuum in metres and nanomatres?
  86. Physics

    I dropped an object from a certain height and gravity was acting on it. What type of motion is that and how do I know this?
  87. Quick Question #2

    How did Max Planck came upon/discover Quantum Physics? thank you
  88. physics

    How much work must be done in stopping a 3,000 kg truck traveling at 60 mph?
  89. AP Physics

    I posted questions down below about chapter 1 aparently they were missed.
  90. physics

    I can't fully understand Fermat's principle of least time (the modern version)
  91. physics

    Two point charges, +3.45 µC and -6.50 µC, are separated by 1.19 m. What is the electric potential midway between them?
  92. physics(cross products of vectors)

    How do I perform the right hand rule? I'm confused.
  93. physics

    A cart travels a constant speed of 2.80 ± 0.01 m/s for a time of 8.80 ± 0.04 s What is uncertainty, &deltax, in the distance, ?
  94. physics

    what is the angular speed of Earth around the Sun in radians per second
  95. physics

    If the resultant velocity is 29.7 m/s and is directed at an angle of 22 degrees, what are the horizontal and vertical components?
  96. physics

    What is the distance travelled in 22 s as a given sound moves through carbon dioxide at 0 C?
  97. physics

    If a car accelerates from rest at a constant 5.5m/s^2, how long will be required to reach 28m/s?
  98. physics

    A train accelerates from rest at a constant rate of 10 m/s^2. How fast is it going after 5 s?
  99. physics

    If jon has a weight of 645N what is his mass? I have to do this using the GUESS METHOD
  100. physics 1

    need wieght in lb.s an apple weighs 1N mass in kilograms give weight in lb.s
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