Funsize Fundamentals2021-05-06T21:29:54-06:00

FUNSIZE FUNDAMENTALS

Nope, we just can’t stop talking about all things physics! So get all Einstein with us and dive deep into more topics than your mind can hold (although we’re almost certain reaching brain capacity isn’t a thing).

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Neutrons can fly undeterred through lead, but they scatter strongly from hydrogen and oxygen. Thus, the lead container looks transparent to neutrons, while the flowers don
Neutron scattering
by Sara Callori, Shireen Adenwalla
When we examine the world around us, we observe its structure, or where things are, as well as its dynamics, or how things move and interact. Likewise, when we investigate a new material, we want to understand its structure and dynamics—where the atoms and molecules are, and what they are doing. To do this, we need measurement techniques that can tell us what is happening at a very small scale. Read on to find out how neutrons come to our rescue!

Dude, where my atoms at?

04/28
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Crystal diffraction

Have you ever wondered why some materials are hard and others soft, some conduct heat or electricity easily while others don't, some are transparent to light while others are opaque . . . and on and on and on? The material universe is vast and diverse, and while a material's properties depend in part on the elements it is made from, its structure—how it is built from its constituent atoms—can also have wide-ranging effects on how it looks, feels, and behaves. Diffraction is a method that allows us to "see" the atomic structure of materials. Read on to find out how it works!

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Ketchup and oobleck and slime, oh my!

04/21
Kids, like many of us, love playing with non-Newtonian fluids. Photo by tookapic/Pixabay.
Kids, like many of us, love playing with non-Newtonian fluids. Photo by tookapic/Pixabay.
What is a Non-Newtonian Fluid?

Why do so many fluids behave counterintuitively? Many substances in our lives – like oobleck, slime, or Silly Putty – don’t quite behave the way we expect a fluid to, despite some fluid-like properties. These substances fall into a special category: non-Newtonian fluids. Scientifically, this term is a bit of a catch-all for any substances that have a complicated relationship between their apparent viscosity and the force applied to them.

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Scanning Tunneling Microscopy

11/05
Researchers at IBM moved around iron atoms on a copper surface to spell out the Kanji characters for the word atom. Image courtesy of IBM.
Researchers at IBM moved around iron atoms on a copper surface to spell out the Kanji characters for the word atom. Image courtesy of IBM.
Using STM to take pictures of atoms

You’re lining up your phone to take a picture of your dog. Light comes down from the sun, bounces off the dog, and into your camera lens, allowing you to take the photo. Your eyes work similarly, taking in all the light particles, known as photons, that are scattering off of objects in the world. Most things “see” by detecting these bouncing photons, which is why both you and your phone have a hard time seeing anything at all when the lights are off.

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This photon walks into a crystal . . .

12/19
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The photoelectric effect

When light strikes a material, electrons may be ejected from the material. This is called the photoelectric effect, and it’s the basis for many different technologies that convert light energy into electrical energy to generate current. In addition, the photoelectric effect is useful to scientists studying novel materials.

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What is Surface Tension?

11/11
Water droplets atop a coin form a flattened spherical shape due to surface tension. Photo by Nicole Sharp.
Water droplets atop a coin form a flattened spherical shape due to surface tension. Photo by Nicole Sharp.
What is Surface Tension?

Surface tension is a somewhat peculiar force. Its effects are all around us, from bubbles and droplets to cleaning our dishes. Surface tension is an important force in our daily lives. But what is it really? Since it tends to act at the scale of millimeters or smaller, we don’t always notice it. It’s critical, however, for many creatures smaller than us, from water-walking insects to star-nosed moles that sniff out food underwater. So what is surface tension and where does it come from?

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What is Viscosity?

07/21
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Honey pours slower than water, but why?

The term may be unfamiliar, but we all have a sense for viscosity. We often think of it colloquially as the “thickness” of a fluid. It’s the property that makes honey pour so differently from water. Fluid dynamicists – scientists and engineers who study how liquids and gases move – tend to think of viscosity in terms of a fluid’s resistance to flowing or changing its shape.

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