The specific heat capacity of water is exceptionally high. This property is primarily responsible for:
A. Water having high surface tension.
B. The formation of sea breezes and land breezes.
C. Water being a good conductor of electricity.
D. Water expanding upon freezing.
Answer: Option B
Solution (By JKSSB Mock Tests)
Water has a specific heat capacity of 4184 J/kg·K, which is very high. This means it heats up and cools down much more slowly than land. During the day, land heats faster than the sea, causing air above it to rise and cool air from the sea to rush in (sea breeze). The reverse happens at night (land breeze).
Explanation:
Optical fibers consist of a central core surrounded by a cladding with a slightly lower refractive index. When a light beam enters the core at an angle greater than the critical angle, it undergoes multiple successive total internal reflections against the core-cladding boundary. This allows the light to travel over vast distances with virtually no loss of energy, making it ideal for telecommunications.
Explanation:
Radiation does not require medium; it travels via electromagnetic waves. Conduction needs medium for molecular collisions, convection needs fluid motion. Sun's heat reaches Earth by radiation through vacuum of space.
No comments yet. Be the first to start the discussion!