The temperature on any given summer day may be in the 80s or 90s. So why does it feel so much hotter and oppressive at times? That's the heat index doing its thing. Here's how it works: What is the ...

The relationship used to determine the heat energy required to change the state of a substance is: \(E_{h} = ml\) \(E_{h}\) is the energy required to change the state ( \(J\)) \(l\) is the specific ...

The same running workout feels harder on a hot day than on a cool one, and it’s not just your imagination. We really do slow down in the heat—at least until we’ve adapted to it—and it’s possible to ...