AUSTIN (KXAN) – With blistering heat this summer, you’ve likely heard a few people say “it’s not the head, it’s the humidity.” Turns out both things are true: it’s called the Heat Index. The heat ...

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 ...