Let's think about what physics is and what topics are covered in an introductory physics course.
Physics is built on a foundation of math and it seeks to explain all phenomena in the universe. It forms the basis for other sciences like chemistry and biology. Physics uses simple yet elegant math to describe complex phenomena, from galaxies to biological systems. It's about understanding and predicting the universe's complexity based on simple ideas.
Welcome to AP®︎/College Physics 1! In AP Physics 1, you'll learn algebra-based classical mechanics. To make sure you’re prepared with the fundamentals, we recommend completing high school physics before diving into AP Physics 1.
Khan Academy offers free, world-class education in physics, covering forces and motion topics.
The correct form is 7th, not 7st. In English, ordinal numbers are used to show position or order. The ending of the ordinal number changes based on the last digit of the number. Numbers ending in 1 use ‘st’ (e.g., 1st, 21st), those ending in 2 use ‘nd’ (e.g., 2nd, 22nd), and those ending in 3 use ‘rd’ (e.g., 3rd, 23rd). All other numbers use ‘th’ (e.g., 4th, 5th, 6th). For ...
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7st or 7th – Which is Correct? by Sarah Thompson It’s a question that has perplexed many English language learners and even native speakers: Should it be “7st” or “7th”? The answer, my dear reader, is quite simple. “7th” is the correct form. Now, let me explain why “7th” is the way to go.