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A variable-length air column is placd just below a vibrating wire that is fixed at both ends. The lenth of the air column open at one end is gradually increased from zero until the first position of resonance is observed at L=34.0cm. The wire is 120cm long and is vibrating in its third harmonic. If the speed of sound in air is 340m/, what is the speed of transverse waves in the wire?
An isolated conductor of arbitrary shape has a net charge of +1.2 10-5 C. What is the charge on the cavity wall
A 111g Frisbee is 25cm in diameter and has half its mass spread uniformly in the disk and the other half concentrated in the rim. What is the Frisbee's rotational inertia
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, what is the height of the final image
A hydrogen atom in its ground state absorbs a photon with an energy of 26 eV, What is the kinetic energy of the ejected electron
You are on a roof, 14.0 m above ground. Dr singer who is 1.78 m tall is 5.0m from the building entrance. How long is the egg in the air
A uniform drawbridge must be held at a 37 degree angle abovethe horizontal to allow ships to pass underneath. Find the magnitude and direction of the force the hingeexerts on the bridge
Dorothy is up on her 16.0m by 15.0m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her ladder, leaving her stranded. Calculate the force on the roof
A 7.00 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. What is the force in each rope when the window washer stands 1.00 m from one end
at a certain facility one net count corresponds to an activity of 12.9 bq in a sample and the expected number 816 of
A beam of neutrons with a de Broglie wavelength of 0.260nm diffracts from a crystal of table salt, which has an interionic spacing of 0.280nm, What is the speed of the neutrons
A biker is riding on a level, horizontal road. The coeffients of friction between her tires and the road are µs = 0.76 (static friction) and µk = 0.41 (kinetic friction). The total mass of the bike and biker is 76.5 kg. She is seated so that the n..
If the linear dimensions of an object are doubled, by how much does the surface area increases? By how much does the volume increases
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