This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
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Question 1: The form of energy that flows from hot object to cold object is heat. Heat always flows from higher temperature to lower temperature. Step 1: Metal feels colder than wood at same temperature below body temperature because metal conducts heat faster from hand. (a) Metal feels colder compared to wood. True (b) Metal conducts heat more than wood. True (c) Reflects more heat than wood. False (reflection not relevant; conduction matters) Question 2: Assume X body temperature 98.6^ and Y lower (e.g., 98^). Heat flows from higher to lower temperature body. Step 1: Compare temperatures: 98.6^ > 98^. (a) X has higher body temperature than Y. True (b) X has lower body temperature than Y. False (c) Both have same body temperature. False Question 3: Boiling point of water is 100^. Step 1: Water starting at lower temperature needs more heat to reach 100^. (a) Water from 20^ to boil needs more heat/time than from higher temperature. True (b) Water from more than 50^ but less than 80^ needs more heat. False (needs less than from 20^) Question 4: Iron ball at 40^, water at 4^. Step 1: Iron temperature T_iron = 40^ > T_water = 4^. Heat flows from higher T to lower T. (a) Flow from iron to water. True (b) Flow from water to iron. False (c) Flow from mug to ball or ball to mug. False