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A 1700 Hz siren and a civil defense official are both at rest with respect to the ground. What frequency does the official hear if the wind is blowing at 12.0 m/s(a) from source to official and (b) from official to source?
A sinusoidal wave on a string is described by the wave function y = 0.19 sin (0.90x ? 62t) where x and y are in meters and t is in seconds. The mass per unit length of this string is 12.0 g/m. Determine speed of the wave. m/s. Determine wavelength of..
100 m3 /min of a gas mixture containing 1 mol % water and 99 mol % air is cooled at constant pressure of 1 bar from 200 °C to 25 °C. 50 % of the water in the inlet stream is condensed during this process. Calculate the cooling duty of the process ..
Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. Assume the speeds of the two canoes after they are pushed apart are 0.60 m/s for canoe 1and 0.44 m/s for canoe 2.
In the high jump, Fran's kinetic energy is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must Fran leave the ground
An engine running at 38.3 percent efficiency receives 287 J of heat from the hot reservoir through each cycle. How much heat is transferred to the cold reservoir through each cycle?
A street lamp weighs 160 Newton. It is supported by two wires that form an angle of 100 degree with each other. Evaluate the tension in each wire supporting the street lamp
A projectile is fired with an initial speed of 113 m/s at an angle of 60 degrees above the horizontal, from the top of a cliff which is 49.0 meters high. determine time to reach maximum height
Supposing that the Earth's magnetic field at this location is 2.0*10^-5 T, due north, what will be the induced emf in the wire 2.0s after it is released (the wire is in free fall, you can calculate its velocity after 2.0s)
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What is the time needed to take off
If a Mack truck with a mass mt = 20000 kg and a Honda Civic with a mass of mc=2000 kg have a head on collision and force upon the Mack truck is 1000 N
What's your normal body temperature? It may not be 98.6°F, the oft-quoted average that was determined in the nineteenth century. What is the difference between these averages
A man pushes a lawn mower on a level lawn with a force of212N. If 52% of this is directed downward, how much work is done bythe man in pushing the mower 4.8 m.______J
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