Here's a Question! - Which is Hotter?
A pot of water is placed on a stove. The stove's burner is adjusted so the water is boiling gently. Then, burner is adjusted so the water boils rapidly. When is the water's temperature the greatest?
Announcer: Frostbite Theater presents... Cold Cuts! No baloney!
Joanna and Steve: Just science!
Joanna: Hi! I'm Joanna!
Steve: And I'm Steve!
Joanna: Here's a question for you...
Steve: A pot of water is placed on a stove.
Joanna: The stove's burner is adjusted so the water is boiling gently.
Steve: Then, burner is adjusted so the water boils rapidly.
Joanna: When is the water's temperature the greatest?
When the water's boiling gently?
Steve: When the water's boiling rapidly?
Joanna: Is it basically a tie?
Steve: Or, does it not matter because water can't boil.
Joanna: Pause the video now if you'd like to think it over before we show you what happens.
Joanna: Whether it's boiling gently or rapidly, water boils at its boiling point, which is 100°C at 1 atmosphere of pressure.
Steve: Now, you may have noticed our thermometer didn't actually read 100 degrees. They're a few reasons for this.
Joanna: First, the water was tap water, so it isn't exactly pure.
Steve: Second, as Joanna alluded to, the boiling point depends on the pressure. If the atmospheric pressure was a bit little lower than standard, then the boiling point's going to be a little bit lower.
Joanna: And, third, the thermometer might not have been calibrated correctly.
Steve: But, either way, it at least showed a consistent temperature, even if it wasn't exactly 100 degrees.
Joanna: Thanks for watching. I hope you'll join us again soon for another question!
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