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A 90° elbow is used to direct water (? = 1000 kg/m3) flow at a rate of 25 kg/s in a horizontal pipe upward. The di-ameter of the entire elbow is 10 cm. The elbow discharges water into the atmosphere, and thus the pressure at the exit is the local atmospheric pressure. The elevation difference between the centers of the exit and the inlet of the elbow is 35 cm. The weight of the elbow and the water in it is con-sidered to be negligible. Determine (a) the water velocity at inlet and outlet, (b) the gage pressure at the inlet of the elbow and (c) the anchoring force needed to hold the el-bow in place. Assume the flow is steady, frictionless, andirrotational.
A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 79.2 m/s at ground level. How long is the rocket in motion above the ground
A proton and electron are far away from each other, how quick would the electron be going in the orbit if we assume centripetal motion?Therefore, what is the electrnss kinetic energy
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.02 m, respectively. Calculate the speeds of the tips of both rotors
A high-speed flywheel in a motor is spinning at 450 when a power failure suddenly occurs. The flywheel has mass 38.0 and diameter 78 . The power is off for 25 and during this time the flywheel slows due to friction in its axle bearings.
A 2.5-m long board with a mass of 12 kg is placed on a bar so that it is perfectly balanced, i.e., A 22-kg child sits on the left end of the board. What is the torque they exert on the system
It takes the Mars rover 4.5 minutes to send information via a radio signal traveling at the speed of light back to Mission Control on Earth. How far away is the rover
q1. a planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. the star exerts a force
A rocket which has an exhaust speed of 8.0 km/s is to have a lift-off vertical acceleration of 8.0 m/s2 from the NASA launch pad. at what minimum rate must the rocket consume fuel
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
q. consider an infinite wire with radius r that carries a current ia compute b r for r lt rconsider a large parallel
A textbook of mass 2.10kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.190m, What is the tension in the part of the cord attached to the book
Two particles oscillate in simple harmonic motion with amplitude A, about the centre of a common straight line of length 2A. How far apart are the particles from each other
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