Which of these is a source of heat energy?

Explanation: Fire produces heat energy through combustion.

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Q: What are located along convergent and divergent plate boundaries?
Ans: volcanoes

Q: After coming apart from the crystal, the individual ions are then surrounded by solvent particles in a process called what?
Ans: solvation

Q: Who was awarded the 'Oman Chandi Lok Sevak Award'?
Ans: Rahul Gandhi

Q: Where has the 79th session of the United Nations General Assembly started?
Ans: New York

Q: What was a key factor in labor market recovery in February 2025?
Ans: Reduced hiring

Q: Which modern drug is an example of an analgesic?
Ans: Ibuprofen

Q: What is the validity of a driving license for commercial vehicles?
Ans: 3 years

Q: What is the base numbering system of metric units?
Ans: tens

Q: What type of matter transmits light but scatters the light as it passes through?
Ans: translucent matter

Q: On August 14, 2024, which state has declared the ancient Ratnagi rock art as a protected monument?
Ans: Maharashtra

Q: In diffusion, substances tend to move from an area of high concentration to an area of what kind of concentration?
Ans: low

Q: Which lubricant is used in a vehicle’s ball joints?
Ans: Grease

Q: If the average of five numbers is 20 and three sum to 50
Ans: what is the average of the other two?

Q: What was the expected impact of more wide releases in 2025?
Ans: Lower box office revenue

Q: Where has the evaluation center 'SPACE' been inaugurated by DRDO for the Indian Navy on April 18, 2024?
Ans: Idukki