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A flat piston of 0.2m radius radiates 100W of acoustic power at 20kHz in water.
(a) Assuming the radiation to be equivalent to that of a piston mounted in an infinite baffle and radiating on only one side, what is the velocity amplitude of the piston?
(b) What is the rediation mass loading of the piston?
(c) What is the beam width at the down 10db direction?
(d) what is the directivity index of the beam?
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A diver can change his rotational inertia by drawing his arms andl egs close to his body in the tuck position. After he leaves the diving board in the straight position (with some unknown angularvelocity), he pulls himself into a ball as closely a..
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An object is placed 25 cm in front of a lens of focal length 20 cm. 60 cm past the first lens is a second lens of focal length 25 cm. How far past the 25 cm lens does the final image form?
1 to work on your car at night you use an extension cord to connect your work light to a power outlet near the door.
What is the final tempearture when a 3.0 kg gold bar at 99 degrees C is dropped into 0.22 kg of water at 25 degrees C
In this experiment, to clarify the components of a vector, and how vectors are added; a Pasco Mechanics system was used. Using the second law of Newton's,
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questionan insulated thermos contains 149 g of water at 71 c. you place in a 10.7 g ice cube at 0 c to form a system of
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