Recent content by Andrews989

  1. A

    How Is Heat Transferred Through Skin Layers?

    So... Q/t = k * A * change in T / L 240 = .2 * 1.6 * change in T / 2 X 10^-3 So the answer would be 1.5 degrees? I think that's right... thanks
  2. A

    How Is Heat Transferred Through Skin Layers?

    Homework Statement The amount of heat per second conducted from the blood capillaries beneath the skin to the surface is 240 J. The energy is transferred a distance of 2.0×10−3mthrough a body whose surface area is 1.6 m2. Assuming that the thermal conductivity is that of body fat 0.2 J /(s...
  3. A

    Big Ben's clock - angular speed problem

    Oh. Good call. Solved it. Thanks
  4. A

    Big Ben's clock - angular speed problem

    Homework Statement Find the angular speed of the minute hand and the hour hand of the famous clock in London, England, that rings the bell known as Big Ben Express your answers using three significant figures separated by a comma. Homework Equations The Attempt at a Solution...
  5. A

    Cat on a Plank Torque Problem: How Close Can the Cat Walk Before the Plank Tips?

    Oh. Didn't think about that. So 1.5 - .91 = .59 meters...which is the correct answer. Thanks!
  6. A

    Cat on a Plank Torque Problem: How Close Can the Cat Walk Before the Plank Tips?

    Mass of the board. Which you count the mass from the center of gravity. So, the plank is 4.2m. The center is 2.1m. The axis of rotation is 1.5m from the right. Making the plank .6 meters from the axis of rotation (to the left). The the torque of the plank is .6m times 5kg * 9.81 =...
  7. A

    Cat on a Plank Torque Problem: How Close Can the Cat Walk Before the Plank Tips?

    Homework Statement A cat walks along a uniform plank that is 4.20 long and has a mass of 5.00 . The plank is supported by two sawhorses, one 0.440 from the left end of the board and the other 1.50 from its right end. If the cat has a mass of 3.3 , how close to the right end of the...