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and what is the tension in the rope? 5) A solid disk with a mass of 0.85 kg starts at the top of a 0.79 m hill and rolls down without slipping. What is the speed of the disk at the bottom of the hill? What is the translational and rotational kinetic energy of the disk at the bottom of the hill, and what is the total kinetic energy? Answer the same question for a hoop with the same mass. 6) A solid disk with a mass of 0.80 and radius of 12 cm is rotating at a rate of 2.6 rev/s when another disk with half the mass and half the radius that is not initially rotating is dropped on the first disk. What is the new rate of rotation when both disks are rotating together at the same rate? How much rotational energy was lost? 7) A 2.0 meter string with a mass of 0.5 grams oscillates with a fundamental frequency of 250 Hz. What is the tension in the string? What is the speed of the wave traveling on the string? What is the frequency of the sound wave in air created from this string? If the temperature is 20 C, what is the wavelength of the sound wave in air? What frequency will the string produce if it is vibrating in its fourth harmonic? 8) If the intensity level of one sound is three times greater than the intensity level of another sound, how much greater is the intensity of the first sound? given by / at a distance of one meter from the source, what is the