three importance of physics
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Physics extends and enhances our understanding of other disciplines, such as the earth, agricultural, chemical, biological, and environmental sciences, plus astrophysics and cosmology - subjects of substantial importance to all peoples of the world.
1. Heat – Stove
Heat is energy that transfers from a warmer substance to a colder one. When you use a stove, the coil, flame, or cook top transfers heat energy to the pot or pan that is set on top of it. Then, the heat from the pot or pan is transferred to the food inside.
2. Sound – Headphones
Small speakers in your headphones use electricity and moving magnets to create sound waves. The sound waves that come from the speaker bounce off your eardrums, which your brain interprets as music. Sound waves that you hear, whether they come from another person or a speaker, bounce off objects and move through the air and into your ears. Your brain uses the waves to interpret where a sound is coming from and how loud it is.
3. Gravity – Ballpoint Pen
At the tip of a ballpoint pen is a ball that rolls as you push down to write on a piece of paper. There is ink inside the pen that sits on top of the ball. Gravity pulls the ink down towards the paper, and the ball rolls in the ink as you write, taking a controlled amount from inside the pen to the paper surface as it turns. If you were to remove the ball that holds back the ink, gravity would pull all the ink down and onto the paper in a puddle.
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