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Q. A thin rod consists of two parts joined together. One third of it is silver and two-thirds is gold. The temperature decreases by 24C°.
ΔL/ (L0, Silver + L0, Gold)

find out the fractional reduce in the rod's length using the formula above, where L0,Silver and L0,Gold are the initial lengths of the silver and gold rods.

Q. Ricardo, of mass 71kg, and Carmelita, who is lighter, is enjoying Lake Merced at dusk in a 45kg canoe. When the canoe is at rest in the placid water, they exchange seats, which are 3.5m apart and symmetrically located regarding the canoe's center. Ricardo notices that the canoe moves 46.7cm horizontally relative to a pier post during the exchange and calculates Carmelita's mass. What is it?

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