Question

Tom weighs 60 kg and is 2m from the center of a seesaw. Jerry, who weighs 40 kg, sits on the seesaw across from Tom. In order
to balance the seesaw, about where should Jerry sit?
60 kg ∙ 2 m = 40 kg ∙ x m

60 ∙ 2 = 40 ∙ x

120 = 40 x

x = 120 / 40 = 3 m
50
What is the atomic number of tin?

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