Category Archives : 3º ESO


Gimp

Computer Grafics Gimp Inkscape   Computer graphics.  Bitmap program   Now, a free bitmap software available for Linex and Windows. The GIMP. Like Photoshop, it has plenty of features that allow us to undertake tasks as easy as changing a colour photograph to make a cool logo or an animation. The best way to understand how […]


Computer Graphics

Computer Grafics Gimp Inkscape   Computer graphics.  Image treatment   The term computer graphics may be defined as images  created by computer software. Today,  all commercial computers use  graphics. A few seconds after you turn on your computer the screan  shows icons  ( small graphics ). There are two types of graphic software depending on how […]


Nuclear Energy

Energy Wind Energy Solar Energy  Nuclear Energy  Nuclear energy. Fusion and Fission   Nuclear energy is energy obtained from the  nucleus of some  atoms. There are enormous amounts of energy in the bonds that hold nucleus particles together. If we break these bonds, energy is released and energy can  be produced ( Fission energy ) […]


Solar Power

Energy Wind Energy Solar Energy  Nuclear Energy  Solar power. How to use its energy   About the sun:   Solar Power is energy obtained  by the sun in the form of light. ( When you are at the beach, you feel the sun as  heat energy, but heat energy can’t travel through  space. It is […]


Wind Energy

Energy Wind Energy Solar Energy  Nuclear Energy  Work, Energy and Power   Work: Wind energy has traditionally been exploited for thousands of years as a source of energy in ship navigation, wind mills and throughout the last 30 years for  producing electricity using wind turbines. Wind is a renewable energy because it uses the wind’s energy. […]


Energy and Power   Recently updated !

Energy Wind Energy Solar Energy  Nuclear Energy  Work, Energy and Power   Work: A man pushing a car along a level road is said to be doing work. The amount of work done depends on the force exerted and the distance through which the force acts. UNIT OF WORK: Since W = F x s, […]


Mechanisms Exercises

Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices  Mechanisms Exercises   1º  Indicate, for each case, in which direction the balance is inclined: towards the right, left or in equilibrium. 2º . What mechanisms can be used if I have to raise a piano to the 6th floor so it can enter through a […]


Turbo Jet

Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices  Turbo Jet. The heart of the aeroplane   Newton’s third law says: For every force acting on a body there is an equal and opposite reaction. 1600 years before any flying machine could ever fly and before Newton announced the third mechanical law, Hero of Alexandria […]


Four stroke engine

Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices  Four stroke engine .    Stroke is defined as the movement of the piston from the ‘bottom dead  centre ‘ (BDC) to the ‘top dead centre’ (TDC) or the other way round, that is from TDC to BDC. A four stroke engine has 4 strokes. 1º […]


Steam engine

Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices  Steam  engine .   A steam engine is a machine  that produces  mechanical work using steam. It needs a hot source to  transform water into steam. On the left, a simple steam engine. There is an inlet valve ( in the middle )   and two Outlet […]