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Answer all questions in the form of complete sentences. If mathematical work is needed to obtain an answer, show all steps from the initial equation used.

1. If the spring tension in the apparatus was increased by 10%, what is the frequency change for this experiment?

2. The moon, mass 7.35 x 1022kg, rotates around the earth in about 28 days. If the moon is about 3.84x105km from the earth, what is the earth's gravitational attraction (pull) on the moon? What is the moons gravitational attraction (pull) on the earth?

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