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Liquid water at 453K and 1002 kPA has an internal energy of 762 kJ/kg and a density of 890 kg/m^3 a) what is the enthalpy (per weight)? b) We change the state to 573K and 1500 kPA. The internal energy is now 2784 kJ/kg and the specific volume 169.7 cm^3/g. What is the change in enthalpy (delta H) and change in internal energy (delta U) (per weight)?
An object is 15 cm in front of a diverging lens that has a focal length of -8.7 cm. How far in front of the lens should the object be placed
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2?J · s. What is the minimum uncertainty in the duck's speed
A 65.0 kg basketball player jumps vertically and leaves the floor with a velocity of 1.80 m/s upward. What impulse does the player experience
Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation. What is the radius (in cm) of coil 2
We all sound like great singers in the shower, due to standing waves. What are the wavelengths of the first two overtones for this shower
After a 0.838 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.49E+6 m/s. Through what angle was the photon scattered
A 10-kg box is at rest on a horizontal frictionless surface, at the end of an unstretched horizontal spring with constant k=4000 N/m, What is the speed of the box when it passes back through the equilibrium point
an object of mass b has a speed that changes with distance d according to v bx-n. what is the force as a function of
A cue ball (mass = 0.145 kg) is at rest on a frictionless pool table. The ball is hit dead center by a pool stick, which applies an impulse of +1.15 N · s to the ball. Find the velocity of the second ball just after it is struck
A father pulls his son, whose mass is 22.9 kg and who is sitting on a swing with ropes of length 3.21 m, What is the speed of the son at the bottom of the swinging motion
A heat engine operates between a hot resrvoir at 1500k and a cold reservoir at 500k. Determine the Carnot efficiency of this engine
An electron is in an angular momentum state with l=3, What is the lenght of the electron's angular momentum vector
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