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A 2 meter long air column is open at both ends. The frequency of a certain harmonic is 410 Hz, and the frequency of the next higher harmonic is 492Hz. What is the speed of sound in the air column?
A nuclear power plant operates at 76% of its maximum theoretical Carnot efficiency between temperatures of 630C and 360C. how much exhaust heat is discharged per hour
when an ac source is connected across a 15.0-omega resistor the rms current in the resistor is 7.10 a.a find the rms
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.555m from the axis of rotation of the stool. Compute the kinetic energy of the system before the dumbbells are pulled in
A solid sphere is released from height h from the top of an incline making an angle ? with the horizontal. (a) Calculate the speed of the sphere when it reaches the bottom of the incline in the case that it rolls without slipping.
a construction crew wants to extend a uniform rigid metal bar of length 7m and mass 400kg between two platforms which lie on the same horizonantally level. What force does the beam exert on the edge of the platform
hearing the siren of an approaching fire truck, you pull over to the side of the road and stop. As the truck approaches, you hear a tone of 460 Hz; Find speed of the truck
An unknown nucleus has twice the volume of a nucleus with 62 nucleons. What is the atomic mass number of the unknown nucleus
A lead bullet with a mass of 0.02 kg traveling at 209 m/s strikes an armor plate and comes to a stop. what is the temperature change
Two wires are parallel (heading north-south). The current in each wire is northward. What is the direction of the magnetic field at the location of the right-hand wire due to the current in the left-hand wire? What is the direction of the magnetic fo..
In an echolocation lab, a student measures the time from the first click of the fingers to the first echo to be 0.0062. what should the student calculate for the length of the tube
assume it takes 7.00 minutes to fill a 30.0-gal gasoline tank.a. calculate the rate at which the tank is filled in
the reserve capacity rc of a car battery is defined as the number of minutes the battery can provide 25.0a of current
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