PLEASE I NEED HELP
A swimming pool is an example of an open system. According to the law of conservation of energy, if swimmers add 12,000 J of thermal energy and the surrounding air removes 8,500 J of thermal energy, what is the total change in energy? A. A decrease of 8,500 J
B. A decrease of 3,500 J
C. An increase of 3,500 J
D. An increase of 20,500
Answers: 3
Biology, 22.06.2019 06:20, noahdeem135
What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas
Answers: 3
Biology, 23.06.2019 00:10, LoneWolves
1. beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. for each time point in the cycle you select, state the following: • whether the atria and ventricles are contracting or relaxing • whether the av valves and semilunar valves are closed or open • whether the pressure in the atria and ventricles is high or low
Answers: 2
PLEASE I NEED HELP
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