Recent content by horsegirl09

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 I am wrong... any help?

thanks i got the answer!

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

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

I still don't see how i can get the efficiency without any temperatures or heat values

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...

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...

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...

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 don't understand what d is.

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))

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)?

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

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...

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!