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Water enters an axial-flow turbine rotor with an absolute velocity tangential component, Vθ, of 15 ft/s. The corresponding blade velocity, U, is 50 ft/s. The water leaves the rotor blade row with no angular momentum. If the stagnation pressure drop across the turbine is 12 psi, determine the hydraulic efficiency of the turbine.
Given Statement: "In free-fall the acceleration is always g and always straight downward regardless of the motion." Three Objections: (a) If I drop a balloon or a feather, it doesn't fall nearly as fast as a brick.
A 75-kg water skier is being pulled by a horizontal force of520 N an has an acceleration of 2.4 m/s2. what force is needed to pull the skier at a constant velocity
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. What is the total time the blue car is moving
Show how an undeflected trajectory for a moving charge is obtained with appropriate crossed E and B fields. Draw seperate diagrams to illustrate your answer for a positive charge and a negative charge.
q1. a person exerts a horizontal force of f 175 n in the test apparatus shown in the drawing. h 0.25 m. find the
an astronomical telescope is used to project a real image of the moon onto a screen 32 cm from an ocular of 6 cm focal
two paths lead to the top of a big hill. one is steep and direct while the other is twice as long but less steep. how
a 6.2 cm diameter pipe gradually narrows to 4.0 cm. when water flows through this pipe at a certain rate the gauge
a horizontal beam of electrons initially moving at 3.3 107 ms is deflected vertically by the vertical electric field
Upon being struck by 240 nm photons, a material ejects electrons with a maximum kinetic energy of 1.44 eV. Estimate the work function of this material
A 180 g wire is held under a tension of 216 N with one end at x = 0 and the other at x = 15.0 m. At time t = 0, pulse 1 is sent along the wire from the end at x = 15.0 m. At time t = 37.9 ms, pulse 2 is sent along the wire from the end at x = 0. A..
The individual firing the gun has mass 63 kg and is standing on a nearly frictionless skateboard, initially at rest. With what velocity will the individual be moving immediately after firing the gun?
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