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" Dim Lights Share a clea.nr URL: Hide Comments, Favorites, Suggested Videos, etc. 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 a measure of weight, the gravitational pull of the Earth attracting the car to Earth's center. When the car is pushed on a flat road, the force of gravity does not oppose the motion. Instead the resistance felt is an indication of the car's mass which determines its inertia. Inertia is the property of matter that means it tends to resist acceleration - the greater the mass, the less the acceleration for a given amount of force. Subscribe 109 videos 32,519 Like Add to Share Uploaded by 1veritasium on Feb 7, 2011 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 a measure of weight, the gravitational pull of the Earth attracting the car to Earth's center. When the car is pushed on a flat road, the force of gravity does not oppose the motion. Instead the resistance felt is an indication of the car's mass which determines its inertia. Inertia is the property of matter that means it tends to resist acceleration - the greater the mass, the less the acceleration for a given amount of force. 320 likes, 14 dislikes Show more Uploader Comments ( 1veritasium ) Actually, it is the friction which is causing difficulty in moving the car. Ideally if there is no friction, whether rolling or sliding, even the slightest of the force would make the car move. You could actually be able to move the car with a push of your little finger if there is no friction at

How do you add all of the slides in different PowerPoint presentations together? How do you keep them formatted the way they were originally designed? Watch this video to learn how.

This song explains how the decay of a radioisotope has a half-life and how to use that half-life to solve decay problems. Corny but clear science. May appeal to some students!

How to become breast self aware

How to make dry ice with a fire extinguisher.

Click on Schools Online to log into the 2011 Higher School Certificate Components Report for each school.This report indicates how consistently each individual student has performed across different components of the examination. The figures do not indicate the performance of an individual student relative to other students, but the student's performance in each component relative to his/her performance in other components. 

How can faulty genes lead to cancer?

So what exactly is a fuel cell, anyway? Why are governments, private businesses and academic institutions collaborating to develop and produce them? Fuel cells generate electrical power quietly and efficiently, without pollution. Unlike power sources that use fossil fuels, the by-products from an operating fuel cell are heat and water. But how does it do this?

"http://yt.cl.nr/__zB80Saglk" Where does gas and electricity come from? This short film explains how National Grid takes the energy from its source, delivering it to homes and high-streets around the country.

The Cambridge IGCSE Physical Science syllabus helps learners to understand the technological world in which they live, and take an informed interest in science and scientific developments. They learn about the basic principles of Physical Science through a mix of theoretical and practical studies. Learners also develop an understanding of the scientific skills essential for further study at Cambridge International AS and A Level, skills which are useful in everyday life. As they progress, learners gain an understanding of how science is studied and practised, and become aware that the results of scientific research can have both good and bad effects on individuals, communities and the environment.

This Uni of Qld site explains how to evaluate the reliability, accuracy and validity of secondary sources.

Cool video that shows how a can of coke will sink in water but a can of diet coke wont due to the differences in the amount of sugar in the cans.

 In this tutorial, you will learn how to insert labels in Moodle.

"http://yt.cl.nr/cckAwavEKA0" This video shows how to make up a standard solution from a calculated mass of solute.

http://yt.cl.nr/MG86IFZi_XM This video takes you through the procedure for diluting a solution. 

"The gastric brooding frog lays its eggs just like any other frog -- then swallows them whole to incubate. That is, it did until it went extinct 30 years ago. Paleontologist Michael Archer makes a case to bring back the gastric brooding frog and the thylacine, commonly known as the Tasmanian tiger. (Filmed at TEDxDeExtinction.)"