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Esterification 20 Mar 2013 | 03:00 am
In an esterification reaction, a carboxylic acid reacts with an alcohol to form an ester and water. Carboxylic acid + Alcohol ↔ Ester + Water Esters consist of two hydrocarbon chains, as labelled ...
Types of levers 12 Feb 2013 | 04:00 am
The lever is one of the simple machines. A lever which is a movable bar moves around a supporting point (fulcrum). Two forces act on the lever: the resisting force of the object (its weight), the d...
Principle of the lever 8 Feb 2013 | 04:00 am
Lifting an object by hand requires applying a force directly on the object. Muscular strength must be facing upwards and intensity (measured in Newtons) should be greater than the weight of the object...
Diffraction 10 Dec 2012 | 04:00 am
When a wave arrives at an opening of very small dimension (on the order of magnitude of the wavelength), it is diffracted, that is to say, the wave front is rounded and widens. Behind the slit, areas...
Water wave interference 10 Dec 2012 | 04:00 am
When two waves of the same frequency and the same amplitude arrive at one point, they are superimposed, and their amplitudes are added giving rise to an "interference pattern." At certain points, the...
Interference fringes 7 Dec 2012 | 04:00 am
When two light waves of the same frequency, the same amplitude, and phase arrive at a point on a screen, they are superimposed, giving rise to an "interference pattern." Maximum illumination zones, an...
Circular waves (water waves) 7 Dec 2012 | 04:00 am
A wave is a disturbance that propagates as a result of initial vibration. If the vibration is maintained, the wave can occur periodically as is the case for this animation. A wave is characterized by...
Number line quiz 30 Aug 2012 | 03:00 am
Locate and identify the integer on the number line based on the two proposed indications (markers or jump). Three levels are available: level 1 for positive numbers less than 50, level 2 for number...
Kirchhoff's circuit laws 25 May 2012 | 10:00 am
Kirschhoff's first law, also known as Kirschoff's current law (KCL), states that at any node of the circuit, the sum of the currents flowing into the node is equal to the sum of current flowing out of...
Kirschhoff's circuit laws 25 May 2012 | 06:00 am
Kirschhoff's first law, also known as Kirschoff's current law (KCL), states that at any node of the circuit, the sum of the currents flowing into the node is equal to the sum of current flowing out of...
