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1. 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?

3. Melting Ice with a Carnot Engine

n= 1-Tc/Th = W/Qh how do i get Qh to get W?
4. 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. Melting Ice with a Carnot Engine

I still dont see how i can get the efficiency without any temperatures or heat values
6. 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. 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. 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. 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. 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. 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. Oscillations of a Balanced Object

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

thanks!!
16. The work-energy theorem

A particle moving in the x direction is being acted on by a net force F(x)= Cx^2, for some constant C. The particle moves from x_initial= L to x_final= 3L. What is deltaK, the change in kinetic energy of the particle during that time? Express your answer in terms of C and L. I got 16CL^3...