Asked by Eli
Why does the Ice start melting when the fans turn off?
Radiation from the Sun
Friction from Air Resistance
Density Changes in Water
All Answers 1
Answered by
GPT-5 mini
AI
Best answer: Density Changes in Water.
Why: when the fans stop the forced air/water motion stops and the fluid can re-stratify by temperature and density. Warm water (less dense) or currents from the surroundings can then move into contact with the ice and transfer heat by natural convection, so the ice melts.
Why the other choices are unlikely:
- Radiation from the Sun: the solar input didn’t suddenly change when the fans were turned off, so it doesn’t explain the abrupt start of melting.
- Friction from air resistance: aerodynamic friction converts negligible energy to heat here and cannot account for the observed melting.
Why: when the fans stop the forced air/water motion stops and the fluid can re-stratify by temperature and density. Warm water (less dense) or currents from the surroundings can then move into contact with the ice and transfer heat by natural convection, so the ice melts.
Why the other choices are unlikely:
- Radiation from the Sun: the solar input didn’t suddenly change when the fans were turned off, so it doesn’t explain the abrupt start of melting.
- Friction from air resistance: aerodynamic friction converts negligible energy to heat here and cannot account for the observed melting.
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