In human biology, handedness is an individual's preferential use of one hand, known as the dominant hand, due to it being stronger, faster or better in dexterity. The other hand, comparatively often the weaker, less dextrous or simply less subjectively preferred, is called the non-dominant hand. Right-handedness is by far more common; about 90% of the human population are right hand dominant. Left-handed people make up 8-9% of the population. Ambidextrious people make up 1% of the population. And finally, cross-dominant (mixed-handed) people make up less than 1% of the population. Handedness is often defined by one's writing hand, as it is fairly common for people to prefer to do some tasks with each hand. There are examples of true ambidexterity (equal preference of either hand), but it is rare—most people prefer using one hand for most purposes. Most of the current research suggests that left-handedness has an epigenetic marker—a combination of genetics, biology and the environment. Because the vast majority of the population is right-handed, many devices are designed for use by right-handed people, making their use by left-handed people more difficult. In many countries, left-handed people are or were required to write with their right hands. Left-handed people are also more prone to certain health problems. However, left-handed people have an advantage in sports that involves aiming at a target in an area of an opponent's control, as their opponents are more accustomed to the right-handed majority. As a result, they are over-represented in baseball, tennis, fencing, cricket, boxing, and mixed martial arts (MMA). (Wikipedia).
Describes what forces are and what they do. You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Mechanics
Simple Machines (1 of 7) Pulleys; Defining Forces, Distances and MA
For the pulley simple machine this video defines the terms input and output force, input and output distance and mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mechanis
From playlist Mechanics
From playlist Inertia
Solving Equations Using Multiplication or Division
This video is about Solving Equations with Multiplication and Division
From playlist Equations and Inequalities
Inertia: What it is and what it is not?
Describes what inertia is and some common misconceptions about inertia. You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Mechanics
Simple Machines (2 of 7) Pulleys; Calculating Distances, Forces, MA, Part 1
For the pulley simple machine shows how to calculate the input and output distances, the input and output forces and mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mech
From playlist Mechanics
Two Sample Hypothesis Test for Two Proportions with StatCrunch
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Two Sample Hypothesis Test for Two Proportions with StatCrunch
From playlist Statistics
Cristen answers questions about why left-handed people are considered evil and whether a handshake contains someone's character. Resources: “Sex differences in left-handedness: a meta-analysis of 144 studies.” Papadatou-Pastou, M. et al. Psychological Bulletin. September 2008. http://www.
From playlist How Cristen Conger Works
Dimensions (1 of 3: The Traditional Definition - Directions)
More resources available at www.misterwootube.com
From playlist Exploring Mathematics: Fractals
Homochirality: Why Nature Never Makes Mirror Molecules
The first 500 people to use this link will get 2 free months of Skillshare Premium Membership: https://skl.sh/stevemould10 Molecules of biological origin always have a fixed handedness or chirality. For example you only ever see right handed sugars and left handed amino acids in nature. B
From playlist Chemistry
Simple Machines (4 of 7) Pulleys; Calculating the Amount of Work Done
For the pulley simple machine shows how to calculate the amount of work done when raising an object and why simple machines do not make your work easier! A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as th
From playlist Mechanics
"Understand power notation and calculate simple powers, e.g. squares, cubes."
From playlist Number: Powers, Roots & Laws of Indices
How to model Helical and Herringbone Gears; pros and cons (Gears pt 3/7)
Topics covered: 0:00 Modelling a helical gear using sweep 2:10 Creating a herringbone gear using mirror and combine 3:15 Creating a double helical gear 4:41 How to compute the angle to put into the sweep command 7:28 Positive and negative twist angles, or handedness 9:34 Transverse and nor
From playlist All about gears
Why Are Some People Left-Handed?
We've got two perfectly good hands attached to two perfectly good arms, so why do most people prefer to use one over the other for common tasks? Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Subscribe to It's Ok
From playlist Brainy Science on YouTube
How Humans Became (Mostly) Right-Handed
Thank you to The Great Courses Plus for supporting PBS. To learn more and try it out go to http://ow.ly/m3ap30rzWfP PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons No other placental mammal that we know of prefers one side of
From playlist Human Evolution Learning Playlist
MIT 3.60 | Lec 3a: Symmetry, Structure, Tensor Properties of Materials
Part 1: Translation, Rotation, Periodicity View the complete course at: http://ocw.mit.edu/3-60F05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 3.60 Symmetry, Structure & Tensor Properties of Material
Puzzle Solved! Cosmic Rays Caused DNA To Turn Right Handed
You can buy Universe Sandbox 2 here: http://amzn.to/2yJqwU6 Or get a shirt: https://teespring.com/stores/whatdamath Hello and welcome! My name is Anton and in this video, we will talk about the discovery of how cosmic rays most likely led the evolution of DNA molecules to be right handed
From playlist Amazing Planet Earth
The Difference Between Mass and Weight
There is a common perception that weight and mass are basically the same thing. This video aims to tease out the difference between mass and weight by asking people what makes a car difficult to push. The standard answer is that it is difficult to push because it's heavy. But heaviness is
From playlist Inertia