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An Emergency Vehicle Siren is designed to emit an 8000 Hz sound. You hear a 9143 Hz tone as it approaches you at 40.0m/s and a 7273 Hz tone as it recedes at 32 m/s.
What is the temperature of the air? (Assume sound speed is 331 + 0.60T) m/s where T is in degrees celsius.
What friction torque is required to reduce its angular speed from 80.0 to 51 in 27.
Consider the system shown in the figure below with m1 = 24.0 kg, m2 = 10.7 kg, R = 0.250 m, and the mass of the pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 4.40 m above the floor when it is released from rest. The pulle..
A 5.00 kg box is pushed a distance of 15.0 m up a rough 20.0 degree incline with a constant force of 35.0 N. calculate he kinetic energy of the box after moving 15.0 meters
Steam is expanded from 12.5 MPa and 900 degrees Celsius to 0.30 MPa, 400 degrees Celsius in an adiabatic turbine. Determine the isentropic efficiency of this turbine
A proton is traveling horizontally at 5.4 × 106 m/s south. A magnetic flux density has a magnitude of 0.25 T and is directed north. What is the force on the proton
The index of refraction for red light in water is 1.331 and that for blue light is 1.340. what are the underwater angles of refraction for the blue and red components of the light
A figure skater is spinning at a rate of 1.2 rev/s with her arms outstretched. What is her new rate of rotation
The rear window of a car consists of thirteen thin wires (resistivity = 88.0 * 10^-8 ohms) embedded in the glass. Find the cross-sectional area of each wire
A box is hanging from a chain having a mass of 60 kg. The box has a mass of 78 kg. Find the tension in the top of chain and the bottom of the chain.
An object of mass 17.0 kg subjected to a non-zero net force moves with an acceleration of 2.6 m/s2. Determine the net force acting on it
question1at what distance from a proton is the magnitude of its electric field 2.3times105? what is magnitude of the
Two forces act on a 100-kg block resting on the floor. The first force, pointing parallel to the floor, What is the magnitude of the net force on the block
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