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a stone is dropped into a well of depth 44 .1 m. the splash of water is heard after 3.12 s .calculate the velocity of sound , given g = 9.8 m/s2
A series RCL circuit includes a resistance of 298 ohm, an inductive reactance of 648 ohm, and a capacitive reactance of 415 ohm. The current in the circuit is 0.634 Amps. What is the Voltage of the alternator?
assume the coefficient of kinetic friction between m_{rm A} and the plane in the figure is mu_k = 0.15, and that m_{rm{A}} = m_{rm{B}} = 2.7{rm{ kg}}. What smallest value of mu _{rm{k}} will keep the system from accelerating.
A simple electric motor consists of a150 turn coil 3.0 centimeter in diameter, mounted between the poles of a magnet that produces a 0.24 T field. Find the maximum torque developed by the motor
two copper wires one three times the diameter of the other have the same current flowing through them. if the thinner
2 kg of a saturated mixture aat 200 kpa and 20 quality is heated at a constant temperature until it becomes a saturated
liquid water at 453 k and 1002 kpa has an internal energy of 762 kjkg and a density of 890 kgm3.a what is the enthalpy
At the Earth's surface, a projectile is launched straight up at a speed of 10.4 km/s. Determine to what height will it rise
In a fluorescent tube of diameter 3 cm, 7 10^18 electrons and 1.75 10^18 positive ions (with a charge of +e) flow through a cross-sectional area each second, What is the current in the tube
Estimate the volume of water in the world's oceans in cu km, assuming a mean depth of water of 4 km. How deep would the water be were it stored entirely as ice on the continents?
The magnetic field produced by an MRI solenoid 2.7m long and 1.7m in diameter is 1.9T. Find the magnitude of the magnetic flux through the core of this solenoid
A 150 g baseball is pitched at 50 m/s and is hit straight back at the pitcher at a speed of 60 m/s. What is the magnitude of the average force on the ball
A railroad car of mass 2.46 multiply.gif 104 kg, is moving with a speed of 4.13 m/s. What is the speed of the four cars after the collision
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