1/n times the height of the real lighthouses.
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Scale (n) is a flake of chitinous substance which protects the skins of fish and some reptiles. Scale (n) is also a device for weighing things. Scale (n) also means the relative size of an image or model.
Total downward force = 300 + 250 + 300 = 850N Total reaction (upward) force must be 850N = scale left (400N) + scale right. So scale right must be 450N.
24 to 1
21 notes on the great scale
7 notes of a diatonic scale