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¿Qué presión ejerce sobre el suelo un vehículo de 4000 kg, sabiendo que cada una de sus cuatro ruedas se apoya sobre una superficie de 70 cm2?
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¿Qué área soporta la presión de 1234 Pa, si se conoce que la presión la efectúa un objeto de masa 95 kg?
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Un objeto en la mar soporta una presión de 4 atm (considere que 1 atm es igual a 101325 Pa). ¿A qué profundidad se encuentra sumergido el objeto?
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1.Use the correct words to complete the sentences, in affirmative, negative or question form. WILL WON´T WOULD WOULDN´T 1. I don't want to speak to Mary today but I _______ speak to her tomorrow. 2. My dad usually gets up early, but on Sundays he ______ stay in bed until nine or ten o'clock. 3. It's a lovely, sunny day today. We ________ need an umbrella. 4. My brother was so angry that he __________ answer my phone calls for a week. 5. I promise I _________ write to you every day. 6. Nicky thought she _______ be late for the meeting so she took a taxi from the station. 7. Don't worry. I'm sure your new passport _________ be ready soon. 8. When I was in the army, we ___________ get up at 5 a.m. every day. 9. Michele was sure he _________ pass his exam, so he was amazed when he got such a good result! 10. Hello. ________ you open the door for me, please?
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. I couldn't find the restaurant because .................................... 2. I failed the English exam because ............................................................................... 3. I argued with my girlfriend because ............................................................................. 4. I couldn't eat the steak because .................................................................................. 5. I didn't wake up on-time because ................................................................................ 6. I couldn’t catch the flight because ............................................................................... 7. I bought a new phone because .
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Complete the sentences in the past perfect tense using your own ideas. 1. I couldn't find the restaurant because .......................................................................... 2. I failed the English exam because ............................................................................... 3. I argued with my girlfriend because ............................................................................. 4. I couldn't eat the steak because .................................................................................. 5. I didn't wake up on-time because ................................................................................ 6. I couldn’t catch the flight because ............................................................................... 7. I bought a new phone because ................................................................................... 8. I couldn’t go swimming because ................................................................................. 9. I couldn’t find my flash drive because .......................................................................... 10. I couldn't read the e-mail because ............................................................................ 11. My phone didn’t work because .................................................................................. 12. I didn't recognize my friend because .......................................................................... 13. I wanted to watch the film because ........................................................................... 14. I didn’t want to go to the pub because .......................................................................
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Escriba características sobre: Las corrientes marinas. Corriente fría de Humboldt. Corriente de Niño Corriente Cromwell Bosque seco Bosque húmedo Páramo Ecosistema marino Efecto invernadero Calentamiento global
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