But we need to add in air resistance. Since our cross-sectional area is now 100 times larger relative to our weight, drag should have a greater effect at nickel size. If it was 42cm jump height before for the jumper, with drag...
It has been supported by a huge study done on, basically, all the empirical material which was out there. All cross-sectional , longitudinal, experimental studies. And I think about 1,000 they revised, and looked especially at this causality and found that's the way.
and then you have age from 20s to 74 right so you see over a lifetime you have to be careful because this really is cross-sectional uh data but you see in general that weight increased a few pounds from 20 uh to 40 but really leveled off and then you lost a few
And as it turns out, this happens if the cross-sectional area of the vessels stays the same before and after the branching. So if you've got a cross-sectional area of two centimeters squared for the main vessel, then each of the two branches need to have an area of one centimeter squared each, for large vessels at least.
The thicker the muscle, the more springs in parallel, and the greater the strength. Therefore strength depends on the cross-sectional area of a muscle. And as animals shrink, this cross-sectional area scales down with the square of their height.
But basically, A, on top, that's a picture of the straight shell that was put in the CT scanner. B shows you a sort of cross-sectional view of what sort of the beginning of the mouth might have looked like inside that shell. And then these shapes here that you're seeing are the tongue of the animal.
That's basically how much force it takes to deform a material. And it's proportional to the cross-sectional area of that material. PMMA is Plexiglas, that's like this material.
Female Presenter: OK. And did you, at what point did this drive to actually keep competing and to pursue going to Regionals and Nationals and Sectionals and all of that, when did that kick in? Kristi Yamaguchi: Well, everything just snowballed.
If it is spinning, then the situation is very different, which you can see with this amazing demo. Imagine this ring of golf balls is like a cross-sectional slice of the football. - Here's what happens when I try and push it back with this leaf blower.
Now a lot of people do with something like that. I agree with you entirely that a cross-sectional study of people who have succeeded, people who have failed,
I mean, after all, if I make you 10 times bigger in every direction, you become 1,000 times more massive, 1,000 times more weight to support, for example. But the strength of your bones are based on the cross-sectional area. So if I make you 10 times larger in every direction, your bones only become 100 times stronger.
Therefore strength depends on the cross-sectional area of a muscle. And as animals shrink, this cross-sectional area scales down with the square of their height. But an animal's weight is proportional to its volume, so that scales with the cube of their height.
You know? And then we found out that it was sold out. she comes, and I have a sectional .
And it produces smoke. Number six, maintain constant cross-sectional area throughout the stove to eliminate bottlenecks. And number seven, elevate the fuel.
that something's up so I such as this may sound crazy but I've been writing a book and he was so elated you could see teacher from high school to read a section of the book it was the sectional in Africa to get her thoughts on both
And as it pulls, we'll monitor two key properties. When you pull on the silk, that force is spread over a tiny cross-sectional area. If you divide the force by that area, you get the stress.
So next, they argue that nature should favor structures that minimize reflections. And as it turns out, this happens if the cross-sectional area of the vessels stays the same before and after the branching. So if you've got a cross-sectional area of two centimeters squared for the main vessel, then each of the two branches need to have an area
DARPA is very interested in all sorts of things that improve human performance. These are so small that a bundle of a million of them would take up only about 1% of the cross sectional area of
They're so small you can count them on two hands in the entire country that have amazing cross-sectional selections of great
reckless banking, class antagonism, sectionalism, war, profitering, and and
- Eventually, if you keep pulling on the silk, it will break. And at that point, the force applied, divided by the cross-sectional area is called its ultimate tensile strength. - We're at about 600 megapascals.
- We're at about 600 megapascals. - To put that in perspective, if you had a rope of spider silk that had a cross-sectional area of one square centimeter, roughly the size of your little finger, it could support about 60,000 newtons of force.
That's about three times that of typical dragline silk, but steel is also about six times denser. So for two ropes with the same mass and length, the silk rope has six times the cross-sectional area. Six times the area at one third the strength, well, that gives a rope that can take twice the force before it snaps.
You can just go-- like, if you find the flow rate of water over Niagara Falls and the cross-sectional area of a drinking straw, and you divide the two numbers,
But in the course of answering this, I had to look up those two amounts, the cross-sectional area of a straw--
The but is many if not most of these studies, while the correlations are there, were weakly designed, because they were cross-sectional
So let's talk about erections. Near and dear to everyone's heart at your age. This is Massachusetts male aging study, which is impressive because it showed us that it was done on a cross-sectional