Page 25 - Ken Ford News Today : Breaking News, Live Updates & Top Stories | Vimarsana

we were talking about radiation, heat transfer by radiation. we've got heat transfer by conduction, heat transfer by convection and, last of all, heat transfer by radiation. and heat transfer by radiation, we talked about this idea. that everything is emitting radiation of some frequency. these are electromagnetic waves. we'll be talking about electromagnetic waves later in the course. and electromagnetic waves have a frequency. there's a high frequency. tick, tick, tick, tick, tick, tick, tick. and there's a low frequency. tick, tick, tick, tick. there's a vibrational frequency to w...

without you touching me. i can't push on you without you pushing on me. i can't nudge you without you nudging me. i can't interact with you without you interacting with me. and this brings up the law of physics, gang, and what's the name of it? newton's what? - third law. - newton's third law. the law of action and reaction. i can demonstrate that like this. i'm bending my fingers up the most i possibly can. that's the most i can bend my fingers up. i can't bend them any higher. but if i push them, ah, i can. let's supposed i push on the podium. ah, now my fingers are being bent up. ...

an arrow is a vector which represents, like, which way and how much, you know? like, when we talk about flying into the wind. notice in the textbook, we talk about the airplane flying into the wind. and we can let the speed of the airplane-- maybe the airplane is going due north, something like this, okay? we could let that arrow be the speed. maybe it's 100 kilometers per hour. so i'd make it 100 units long. and let's suppose i'm going into a headwind, and the wind is coming toward me at 20. well, i can go like this, see, make an arrow 20. when i combine these things, my ground spee...

let's begin. hey, what's the difference between a hot cup of coffee and a cold cup of coffee? temperature. we say temperature. what's that mean? something different at the atomic level, hot cup of coffee, cold cup of coffee. in the hot cup of coffee, there's more activity. the molecules are jiggling faster. they have more energy of motion. we got a name for energy of motion. what do we call it? - kinetic energy. - kinetic energy. there's more kinetic energy in the molecules in a hot cup of coffee than a-- you know that. that's what it means to say that something's hot, that it has mo...

and as the peacock turns, you noticed that the colors-- the colors of those feathers kinda change a little bit. or you see a child blowing bubbles, great big bubbles, and the bubbles floating off in the wind, yeah? and you look at the bubbles and you see--wow, what you see? beautiful rainbow colors in the bubbles. you see the spectrum. you see all the colors reflecting from the bubbles. isn't that right? or sometimes you take, like, an abalone shell and you hold up the abalone shell and you see the beautiful colors. we call these iridescent colors, yeah? and you're looking at the she...