Latent heat of fusion ice = 336 kJ/kg. Heat to melt 3 kg ice at 0°C:
A. 112 kJ
B. 1008 kJ
C. 336 kJ
D. 672 kJ
Answer: Option B
Solution (By JKSSB Mock Tests)
Q = mL = 3×336 = 1008 kJ. Direct latent heat formula application. Memory tip: 'Phase change: Q = mL; no temperature change'. Calorimetry calculation frequently tested in competitive exams.
Explanation:
Convex mirror gives wider field of view, always forms virtual, erect, diminished image. Allows driver to see larger area. Concave can magnify but field narrow. Plane gives normal view but limited field.
Explanation:
Sound waves in air are longitudinal, particles vibrate parallel to wave propagation. Light and radio are electromagnetic, transverse. Waves on a string are transverse. In fluids, only longitudinal mechanical waves can propagate.
No comments yet. Be the first to start the discussion!