Explanation:
Pressure is scalar (no direction), though force is vector. Reason: Pascal's law - fluid pressure transmits equally in all directions, confirming scalar nature. Memory aid: 'Pressure = force/area (scalar division); isotropic in fluids'. Assertion-reason testing fluid mechanics fundamentals, common in competitive exams.
Explanation:
Water has exceptionally high specific heat (4200 J/kg°C) due to hydrogen bonding. Used as coolant. Iron ~450, copper ~385, aluminium ~900. High specific heat moderates climate.
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