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A fireman clings to a vertical ladder and directs the nozzle of a hose horizontally toward a burning building. The rate of water flow is 6.28 kg/s, and the nozzle speed is 13.0 m/s. The fireman holds the nozzle 1.42 m vertically above his boots on the ladder. Choose the origin to be inside the hose by the fireman's feet.
What is the rate of change of angular momentum of the water?
A 10-cm length of wire carries a current of 3.0 A. What is the magnitude and direction of the force on this segment of wire
Five computers are plugged into 120V wall outlet in parallel. Each computer has a resistance of 50ohm when running. a) Sketch the schemetic of this circuit. b) Calculate the effective ressitance.
Imagine that a relativistic train travels past your lecture room at a speed of 0.887 c. The passengers of the train claim that when they measure the length of the train using standard meter bars found on the train, the length comes out to be 85.8 ..
At the Paris Auto Show this week, a concept car by Lamborghini called "Sesto Elemento" (Sixth Element) was being shown. Calculate the average power during the acceleration
A small droplet of oil with mass of 4.81×10-15 kg is held suspended in a region of uniform electric field directed upward with a magnitude of 7025 N/C
An infinitely long cylinder, radius a, carries a current I, distributed uniformly over its cross-sectional area. The axis of the cylinder coincides with the z-axis.
A 5.00 kg block carrying a charge Q=60.0?C is connected to a spring for which k=100N/m (see diagram below). The block lies on a frictionless horizontal track, What is the equilibrium position of the block
A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, compute the linear momentum of the electron
A block with a mass of 40 kg is on an inclined plane with an angle of 20 degrees. Determine the normal force on the block
A pendulum has a period of 0.80s on Earth. What is its period on Mars, where an acceleration of gravity is about 0.37 that on Earth.
On a workday the average decibel level of a busy street is 78 dB, with 100 cars passing a given point every minute. what is the decibel level of the street
Considered an elastic collision in one dimension in which one of the objects is initially at rest. Notice that mass 2 is the one that is initially at rest. find the final velocity of the bigger object
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