Question: 1 . A 4.5 m long rod has a mass of 2.8 kg and is stretched 0.21 m by force. What is the strain on

1 . A 4.5 m long rod has a mass of 2.8 kg and is stretched 0.21 m by force. What is the strain on the rod?

2. Assuming atmospheric pressure to be 1.013 x 10^5 Pa and the density of sea water to be 1025 kg/m. What is the absolute pressure at a depth of 15.0 m below the surface of the ocean.

3. An object weighs 155 N in air. When tied to a string connected to a balance and immersed into water, it weighs 88 N. Find the density of the object.

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