Recent content by horsegirl09

  1. H

    The Carnot Icemaker

    i figured out the Qh and got 3.113x10^7 J but now it wants to know how much Energy E must be supplied to the engine, in joules. I know that E_int= Q+W but says im wrong... any help?
  2. H

    Melting Ice with a Carnot Engine

    thanks i got the answer!!
  3. H

    Melting Ice with a Carnot Engine

    n= 1-Tc/Th = W/Qh how do i get Qh to get W?
  4. H

    Melting Ice with a Carnot Engine

    Tc=273 k Th= 373 k n = 1- (Tc/Th) n = 1- (273/373) n = 1-.73 n = .27 or 27%
  5. H

    Melting Ice with a Carnot Engine

    I still dont see how i can get the efficiency without any temperatures or heat values
  6. H

    Melting Ice with a Carnot Engine

    A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. In 5 minutes of operation of the engine, the heat rejected by the engine melts a mass of ice equal to 3.40×10^−2 kg. Throughout this problem...
  7. H

    The Carnot Icemaker

    An ice-making machine inside a refrigerator operates in a Carnot cycle. It takes heat from liquid water at 0.0 C and rejects heat to a room at a temperature of 22.2 C. Suppose that liquid water with a mass of 86.2 kg at 0.0 C is converted to ice at the same temperature. Take the heat of fusion...
  8. H

    Water Flowing From a Tank

    Water flows steadily from an open tank as shown in the figure.The elevation of point 1 is 10.0 meters, and the elevation of points 2 and 3 is 2.00 meters. The cross-sectional area at point 2 is 0.0480 square meters; at point 3, where the water is discharged, it is 0.0160 square meters. The...
  9. H

    Oscillations of a Balanced Object

    Oscillation of a balanced object moment of inertia about the end of a rod is (1/3)mL^2. The pivot point is where the ends of the two rods meet. So i dont understand what d is.
  10. H

    Oscillations of a Balanced Object

    Oscillation of a Balanced Object The moment is mL^2 for one rod, 2mL^2 for both. The center of mass of each rod is L/2. therefore d is L/2. w= sqrt((2m*g*L/2)/(2mL^2))
  11. H

    Oscillations of a Balanced Object

    I= (1/12)mL^2 but there are two so it would be (1/6)mL^2 Center of mass of the object is the moment of the L shape divided by the mass of the object. ((1/6)mL^2)/2m)?
  12. H

    Oscillations of a Balanced Object

    w= sqrt(Lmg/I_cm + mL^2)??? with the parallel axis theorem?
  13. H

    Oscillations of a Balanced Object

    Two identical thin rods, each of mass m and length L, are joined at right angles to form an L-shaped object. This object is balanced on top of a sharp edge. If the object is displaced slightly, it oscillates. Assume that the magnitude of the acceleration due to gravity is g. Find omega, the...
  14. H

    Vector Cross Product

    If vectors V_1 and V_2 are perpendicular, lV_1 x V_2l =? I know that if they are parallel for vector cross product, they equal 0.
Top