The source of geothermal energy is: (Work, Power & Energy,renewable energy sources)
Correct answer: C. residual heat of the Earth
- A. decay of radioactive elements in the earth
- B. compression of material in the earth
- C. residual heat of the Earth
- D. all as said in a, b and c
Explanation
Explanation: Geothermal energy comes from the Earth's internal heat, which is primarily generated from the decay of radioactive elements in the planet's core. This residual heat has been trapped since Earth's formation and continues to provide a significant source of energy. Incorrect Options:(a) Decay of radioactive elements in the earth: While this is a contributing factor, it's not the sole source. Other processes like compression and gravitational forces also contribute to Earth's internal heat.(b) Compression of material in the earth: Compression can generate heat, but it's not the primary source of geothermal energy. Radioactive decay is the predominant contributor.(d) All as said in a, b, and c: While all these factors contribute to Earth's internal heat to some extent, residual heat from radioactive decay is the dominant source of geothermal energy.
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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