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Water at a pressure of 4.5 atm at street level flows into an office building at a speed of 0.7 m/s through a pipe 5 cm in diameter. The pipe tapers down to 2.6 cm in diameter by the top floor, 20 m above. What is the pressure in the top floor pipe. Pressures are gauge pressures. Give your answer to the nearest tenth of a kPa.
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 rpm in 10.0 s. What force is required at the edge
Find the magnitude of book's velocity, just before the book reaches the floor. Find the direction of book's velocity
A wheel starts at rest and takes 3.00 s to rotate 37.0 revolutions at which point its angular velocity is 98.0 rad/s. What is the constant angular acceleration of the wheel
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 33.3 m/s. Find the airplane\'s acceleration
A crate of mass 9.8 kg is pulled up a rough incline with an initial speed of 1.56 m/s. The pulling force is 102 N parallel to the incline, What is the change in kinetic energy of the crate
Three protons are at the vertices of an equilateral triangle 0.800nm on each side. What is the potential energy of this set of charges
A hot-air balloon is accelerating upward under the influence of two forces, its weight and the buoyant force. What is the acceleration of the rising balloon
A circuit consists of a battery connected to three resistors (65?, 26?, and 170?) in parallel. find the current through each resistor
1. a converging lens has a focal length of f 23 cm. an object is placed 44 cm from the lens. find the size of the
one end of a unifrom meter stick of mass 0.25kg is placed against a vertical wall. The other end is held by a lightweight cord making an angle ? =20 degree with the stick, find the frictional force between the stick and the wall
question a train locomotive is pulling two cars of the same mass behind it. determine the ratio of the tension in the
A constant voltage of5.00 V has been observed over a certain time interval across a 3.00H inductor. How long was this time interval
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