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A horizontal pipe carries a smoothly flowing liquid with density 1.27 × 103 kg/m3. At locations 1 and 2 along the pipe the diameters are 5.35 cm and 2.91 cm, respectively.The flow speed at location 1 is 1.65 m/s. What is the pressure difference between location 2 and location 1 (including its sign)? Ignore viscosity
A long jumper leaves the ground at 45 above the horizontal and lands 8.2 away. What is her "takeoff" speed
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass, how fast is the person running
The drawing shows two perpendicular, long, straight wires, both of which lie in the plane of the paper. Find the magnitudes of the net magnetic fields at points A and B
nozzle of a hose is pointing straight up. the water rises to a height h above nozzle openig. how high does the water rise
A sealed cubical container 17cm on a side contains three times Avogadro's number of molecules at a temperature of 16°C. Find out the force exerted by the gas on one of the walls of the container.
Coulomb's Law gives us an expression for the electric field caused by a point charge with magnitude . Suppose we have several point charges. The electric field at a location is the vector sum of point charge contributions.
A rope of negligible mass is wrapped around a 225 kg solid cylinder of radius 0.40 m. The cylinder is suspended some meters off the ground with its axis oriented horizontally, and turns on that axis without friction.
What is the stopping distance when the surface is dry and the coefficient of friction is 0.620.
Explain how long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation change is 425 {rm m}?
A 0.20-kg baseball is dropped and reaches a speed of 1.0 m/s just before it hits the ground. What is the change in the ball's momentum
A kid is outside his home playing with a metal hoop and stick. If the hoop starts from rest at the top of the hill and reaches a linear speed of 9.50 m/s in 11.5 s, what is the angular acceleration of the hoop
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. It vibrates with a fundamental frequency of 27.5 Hz. What is the total mass of the wire.
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