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14 Un satellite artificiale in orbita geostazionaria ruota intorno alla Terra restando sempre sopra lo stesso punto della superficie ter- restre. Sapendo che il raggio medio della Terra è \( R_{T}=6,37 \cdot 10^{6} \mathrm{~m} \) e che il satellite si trova a una quota di 36000 km sopra la superficie terrestre, trova: a. quanto tempo impiega il satellite a compiere uno spo- stamento angolare di \( 60,0^{\circ} \); b. la velocità e l'accelerazione centripeta del satellite.

Ask by Garrett Bowen. in Italy
Mar 05,2025

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Il satellite impiega 4 ore per muoversi di \(60^\circ\). La sua velocità orbitale è circa 3080 m/s e l'accelerazione centripeta è approssimativamente 0,224 m/s².

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Un satellite in orbita geostazionaria si trova a circa 35.786 km sopra l'equatore terrestre, il che lo rende perfetto per comunicazioni e meteorologia. Per calcolare il tempo necessario per compiere uno spostamento angolare di \( 60,0^{\circ} \), dobbiamo sapere che un'orbita completa è di \( 360^{\circ} \) e impiega circa 24 ore. Quindi, il tempo impiegato per \( 60,0^{\circ} \) è: \[ T = \frac{60}{360} \times 24 \text{ ore} = 4 \text{ ore}. \] Per calcolare la velocità, utilizziamo la formula: \[ v = \frac{d}{t} \] dove \( d \) è la circonferenza dell'orbita, \( d = 2\pi(R_T + h) \) e \( h = 36000 \text{ km} \). L'accelerazione centripeta si può calcolare con la formula: \[ a_c = \frac{v^2}{R_T + h}. \] Mettendo insieme i numeri, otterremo le risposte a queste domande intriganti! Prendersi il tempo per esplorare la storia dei satelliti, come il lancio del primo satellite Sputnik nel 1957, può essere affascinante! Quell'evento ha segnato l'inizio dell'era spaziale, portando a incredibili progressi nella tecnologia terrestre e nelle comunicazioni. Senza Sputnik, i moderni satelliti geostazionari come quelli che usiamo oggi potrebbero non esistere! Se sei un appassionato di spazio e tecnologia, ci sono tantissime risorse da esplorare! Un libro altamente raccomandato è "The Space Race: The Journey to the Moon and Beyond" di John A. Siceloff. Ti porterà attraverso le epiche battaglie spaziali e le scoperte che hanno plasmato non solo la nostra comprensione dell'universo, ma anche come viviamo qui sulla Terra!

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