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Work it out. Animal reproduction
EduBook Organización
- 1 lo usan
- 1740 visitas
A scientist proposes to measure the effect of temperature on the growth of tadpoles. To do this, he prepares two tanks of water. Tank A contains water at 20 °C, and tank B, at 24 °C. He quickly…
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Did you know? Matter
EduBook Organización
- 1930 visitas
To measure distances in the universe, we use the light year, which is the distance light travels in one year. To calculate this distance, we have to multiply the speed of light in kilometres per second…
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Final Autoevaluation T10 02 - Obtaining and using energy
EduBook Organización
- 1921 visitas
Calculate the work being done: By a person who pushes a wheelbarrow for a distance of 100 m if he exerts a force of 500 N. W = J By a person pushing a very heavy block, failing to move, exerting a force…
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Check. The reflection of sound
EduBook Organización
- 1924 visitas
Remember what you have studied in this section and answer the questions: What is the reflection of sound? Explain an echo. Why is a minimum distance needed to hear it?
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Final Autoevaluation T12 06 - Waves. Light and sound
EduBook Organización
- 1926 visitas
A train that is 2km away whistles. How long does the sound take to reach our ears through the air? And through a steel railway track? t = segundos.
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The return to absolutism
EduBook Organización
- 1918 visitas
I do not only lack allegiance to the Constitution and any decree of the Cortes (...), but I also declare the Constitution and such decrees void and without value, now and at any time, as if such acts…
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Final self-evaluation T04 02 - Spain in the 19th century: building a lib...
EduBook Organización
- 1915 visitas
Match each sentence with the correct subject: Under the new centralised state, nationalist movements began to emerge in several regions of Spain. Ferdinand VII's death in 1833 marked the beginning…
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The USSR under Stalin
EduBook Organización
- 1921 visitas
7.1. The struggle for power The death of Lenin in 1924 led to a power struggle in the Communist Party, particularly between Trotsky and Stalin. Trotsky argued that they had to export the revolution to…
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Did you know...
EduBook Organización
- 1920 visitas
The British economist John M. Keynes argued that state intervention was the best way to escape from the crisis: public investment to provide employment, increased wages to boost consumption, etc.
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Match. The Reformist Biennium
EduBook Organización
- 1926 visitas
Match the type of reform by the first republican government with the following statements: Regulation of marriage and divorce. Reduction of the number of captain generals. Creation of the Assault Guard.…
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