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Q. A violinist places her finger so that the vibrating section of a 1.3g/m string has a length of 40.00 cm, after that she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with a wavelength of 60.0cm. What is the tension on the string?

Q. During an all-night cram session, a student heats up a (0.6 x10-3 m3) glass (Pyrex) beaker of cold coffee. Originally, the temperature is 18°C and beaker is filled to the brim. A short time later while the student returns, the temperature has risen to 91°C. The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker?

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