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Course: Middle school physics - NGSS?>?Unit 1
Lesson 1: Representing motionIntroduction to Middle school physics
In this course, you'll develop a foundation in the physical laws that govern our world. From forces and motion to energy and waves, learn about the principles that explain how and why things work the way they do. Created by Iman Howard.
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- Is it possible that there are actually physical laws we haven't discovered yet?(27 votes)
- Why does it seem that every post here is a copy of another one here? ???(14 votes)
- I the ngss courses, it has the same Sal and lady on the video. It that what you mean?(0 votes)
- What is the diference between "Middle school physics - NGSS" and "Middle school physics"? What does NGSS mean? Thank you!(8 votes)
- NGSS stands for the Next Generation Science Standards. hope that helps:)(5 votes)
- Sal Khan: Is there physics in space- Hamza Ahmed(6 votes)
- Physics does apply to space because the objects in space follow the laws of physics.(5 votes)
- Is it possible that there are actually physical laws we haven't discovered yet?(3 votes)
- When we say that the world is big enough to accommodate all creatures, the answer is yes, because we are only a part of something big, and when I say big, I mean something that our mind cannot imagine, regardless of its type or size, and that we only know one percent of the Earth, from the depths of the seas to the tops of the mountains.
The Earth is a point in the universe, and we are like a grain of bacteria that cannot be seen with the naked eye in relation to the universe, even though we are 7 billion human beings on Earth, but despite all this, we are just grains and nothing more. Therefore, I personally do not advise myself for any arrogance and war, because we are nothing in relation to other things, which are... The universe, you know what, the universe has nothing to do with the earth itself(4 votes) - how does people know ths kind of stuff?(3 votes)
- I'd like to quote "Physics is essentially an intuitive and concrete science. Mathematics is only a means for expressing the laws that govern phenomena. " Albert Einstein. Physics is essentially the most fundamental science in the world and as a child of science I have an extreme and all consuming passion for it. How do I apply Einstein's quote to my life in status quo?(3 votes)
- Are there some things we don't know abt like what about extraterrestrial life but one thing for sure star wars is not real or at least i think so(3 votes)
- Why is everything basically made out of matter?(2 votes)
- Matter is the amount of space something takes up. Since everything you can see takes up space, then it has matter(3 votes)
Video transcript
- Hi everyone. Sal Khan here and welcome
to Middle School Physics. I have Iman Howard, who manages
all of our STEM content. Iman, why should folks be excited about Middle School Physics? - So, Middle School Physics
is, like, the only science out there that explains how things happen. And so basically
everything's made of matter. Me, you, the chair that I'm sitting on, and this course is gonna
explore how we exist in the natural world. So, for example, we talk a little bit about movement in forces, and we learn that everything
that we have a collision with has this equal but opposite force that's applied when the collision happens. So that's why when you
give those high fives, and then your hand starts stinging. It's because the same
force you gave your buddy is the same force they gave you back. And then we also talk about force in a way where it doesn't touch you. So, like, I'm thinking like "Star Wars". There's, like, this force
energy like gravitational. There's magnetic energy.
There's electric energy. And then finally we get into waves, and we talk a little bit about
how waves, you know, exists, whether it's sound waves or
even the waves in the ocean. What do you think is exciting about it? - Oh, well that's a
dangerous question to ask me. I wanted to be a physicist,
and I still aspire to be it, because, you know, we kind
of wake up in this cosmos, and we're just trying to
understand where we fit in. And physics asks the most
fundamental questions about how the universe works. And so when I first learned
about Newton's laws, and fields, and all of the
things that you just touched on, it started to give me goosebumps, 'cause I'm like, wow, we
can finally understand how the universe fits together, and then use that to make predictions, and then think about things
that we don't understand. And there is so much
that we don't understand. So I think this is the beginning of a very, very exciting
journey in physics. - I agree, Sal. (gentle music)