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An object of height 100m is placed at 4am to the left of a convex lens of focal distance 3cm. Compute the distance at which the image at the object will be created, in cm. Number Units Sound waves travel in air at a velocitty of 340 m. 31. We hit the end of a closed box with cylindrical shape of length L=23.2cm. What is the fundamental frequency of the standing waves in the box? Number Units 1 A stretched string has first harmonic 650Hz. It's length is 20.56m. Compute the speed oi the waves traveling on the string, in m. .9 Number Units