Calculate - End-of-unit activities

Calculate the work done by a person who pushes a wheelbarrow for a distance of 100 m if he exerts a force of 500 N. What is the efficiency of a machine which does 230 J of work but uses 410 J of total energy?

Unit 10: Obtaining and using energy

Acid rain (n): rain which is acidic due to the presence of pollutants. balanced (adj): distributed evenly. biomass (n): organic matter used as a source of energy. blade (n): the arm which makes a wind…

Summarise. The First World War and the Russian Revolution

Summarise the text. Write paragraph headings. At the beginning of the 20th century, economic rivalry between the nations and the colonies led to an increase in tension amongst the European states. An…

Find out more. The Rif war in Morocco and the Tragic Week

After losing the Spanish-American War in 1898, Spain sought out new territories in Africa. The Algeciras Conference (1906) established a Spanish-French territory in Morocco, with Spain controlling the…

Final evaluation T11 07 - A bipolar world: the cold war and decolonisati...

What is the welfare state?

Did you know...

Towards the end of the 20th century, the rapid growth of new information and communication technologies added a whole new dimension to art. The use of videos meant that the concept of time became a part…

CLIL

Monomios

Un monomio es el producto indicado de un número por una o varias letras que tienen exponentes enteros no negativos. Por ejemplo, son monomios: Los monomios están compuestos por un número, el…

Indica. Elementos de una ecuación

Indica el primero y el segundo miembros de la ecuación 4x + 2 = 5x + 4. ¿Cuál es su grado? Primer miembro de la ecuación: Segundo miembro de la ecuación: El grado de la ecuación es:

Área y volumen de una esfera. Actividad 5

Calcula la superficie y el volumen de la Tierra sabiendo que el radio mide 6400 km. Considera π = 3,14. La superficie de la Tierra mide ·10 km2, y su volumen ·10 km3.