- Who found the mpemba effect?
- Does hot water kill germs?
- Which is faster heat or cold?
- Who was mpemba?
- Does hot water freeze clearer than cold water?
- How does the mpemba effect work?
- Does hot water freeze faster than cold water Mythbusters?
- Which is faster light or sound?
- What gets hotter the colder it gets riddle?
- Does hot air travel faster than cold air?
- Which water will freeze faster?
Who found the mpemba effect?
The effect now known as the Mpemba effect was first noted in the 4th century BC by Aristotle, and many scientists have noted the same phenomenon in the centuries since Aristotle’s time..
Does hot water kill germs?
Hot water kills germs, though it has to be very hot According to WHO, temperatures of 140°F to 150°F are enough to kill most viruses, and boiling water makes it safe from pathogens like bacteria, viruses, and protozoa.
Which is faster heat or cold?
Answer : Definitely Hot is faster. Reason : You can catch cold but you dont catch hot.
Who was mpemba?
Erasto Bartholomeo Mpemba (born 1950) is a retired Tanzanian game warden who as a schoolboy discovered the eponymous Mpemba effect, a paradoxical phenomenon in which hot water freezes faster than cold water under certain conditions; this effect had been observed previously by Aristotle, Francis Bacon, and René …
Does hot water freeze clearer than cold water?
Conclusion: Hot water does not freeze significantly clearer than cold water, even when the vessel is covered to reduce oxygen re-absorption. In all of these ice experiments so far, the major cloudy factor in the ice has not been cloudiness throughout the ice, but a cloudy spot in the center of the ice.
How does the mpemba effect work?
The Mpemba effect is a phenomenon in which hot water appears to freeze faster than cold water. The phenomenon is temperature-dependent. … The Mpemba effect is named after Tanzanian schoolboy Erasto Bartholomeo Mpemba (born 1950) who discovered it in 1963.
Does hot water freeze faster than cold water Mythbusters?
Hot water freezes faster than cold, known as the Mpemba effect. … Evaporation is the strongest candidate to explain the Mpemba effect. As hot water placed in an open container begins to cool, the overall mass decreases as some of the water evaporates. With less water to freeze, the process can take less time.
Which is faster light or sound?
Light doesn’t need a medium to travel. The speed of sound through air is about 340 meters per second. It’s faster through water, and it’s even faster through steel. Light will travel through a vacuum at 300 million meters per second.
What gets hotter the colder it gets riddle?
What gets colder as it warms up? An air conditioner.
Does hot air travel faster than cold air?
The molecules in hot air are moving faster than the molecules in cold air. Because of this, the molecules in hot air tend to be further apart on average, giving hot air a lower density. That means, for the same volume of air, hot air has fewer molecules and so it weighs less.
Which water will freeze faster?
The Mpemba effect is the observation that warm water freezes more quickly than cold water. The effect has been measured on many occasions with many explanations put forward. One idea is that warm containers make better thermal contact with a refrigerator and so conduct heat more efficiently. Hence the faster freezing.