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Determina cada quant de temps (en segons i arrodoneix a 1 decimal) hauriem de modificar els paràmetres del nostre transmissor-receptor per adaptar-nos al nostre canal si estam transmetent a una freqüència de 1MHz i estam circulant  a una velocitat de 60 Km/h.

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Si no volem que el senyal transmés generat per un modulador 16QAM pateixi esvaïments ràpids, determina la taxa mínima en bps (un decimal) a la que hem de transmetre si:

  •  la velocitat màxima a la que circularem per l'entorn és de 120Km/h i 

  • la freqüència d'operació del nostre sistema són 2,4GHz

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Complete the sentence.

We ________ (to wait) for the bus for 20 minutes when it finally arrived.

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Fill in the gap.

By the time the movie started, we _______________(wait) for over 30 minutes. 

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Fill in the gap.

Sarah ______________(to work) at this company for five years before she decided to leave. 

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Define the proper tense. 

Have you ever broken your leg? 

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Choose the correct sentence order.

He drinks coffee with milk. (usually)

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Complete the sentence 

Yesterday he ______ 5 kilometres. 

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Fill in the gap.

She arrived at the airport just __________time for her __________.

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Choose the correct option.

They ___________video games for the whole night last Sunday.

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