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Gun
.grande:maestro.

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 Esercizi

A) EQUAZIONI DIMENSIONALI
01-04-2009 08:18
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1. L'espressione S=2*pigreco*vel*lunghezza/tempo è corretta? Che dimensioni ha?



[no]
01-04-2009 08:20
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2) Cosa manca nell'espressione dell'esercizio 1) affinchè sia dimensionalmente corretta?



[un termine a destra..quale?]
01-04-2009 08:21
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.grande:maestro.

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3) Che dimensioni ha la costante in :

(Forza*velocita*accelerazione/Tempo) + cost*(massa*tempo^2)/(4*pigreco*Raggio^3*pressione)


dove ^2 significa al quadrato ecc..







[kg*m^5/s^10]
01-04-2009 08:23
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.grande:maestro.

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4) Esprimere, nel sistema MKSA, le dimensioni di:

D=4*(pressione^2)*Volume/Temperatura





[(kg^2*m)/(K*s^4 )]

Last edited by Gun on 06-04-2009 at 09:56
01-04-2009 08:25
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5) Che dimensioni ha la costante gravitazionale G?


[m^3/(kg*s^2)]
01-04-2009 08:26
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6) Energia e Lavoro sono grandezze confrontabili?



[sì, si misurano entrambi in joule, che è uguale a....]
01-04-2009 08:27
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7) Che dimensioni ha la costante g? Ricavarle usando G.


[m/s^2]
01-04-2009 08:27
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B) Cifre Significative
01-04-2009 08:28
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8) Se un terreno agricolo ha lato l=2,45*10^3 ed è quadrato, che superficie ha? Esprimere il risultato con 3 cifre significative


[S=6,00*10^6m^2]
01-04-2009 08:30
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9) Se il terreno dell'esercizio viene arato a strisce orizzontali fino ad una profondità di 2,3 m, quanta terra verrà tolta dal campo? Esprimere il risultato con 2 cifre significative.


[V=0.69*10^7m^3]
01-04-2009 08:32
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10) Come faccio ad avere 4 cifre significative nel risultato dell'esercizio 9)?


[:o)]
01-04-2009 08:33
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11) Una sfera ha di raggio r=0,041mm, che dimatro ha? E il volume? Conservare il numero di cifre significative


[d=0,082mm;V=2,9*10^-14m^3]
01-04-2009 08:34
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12) Senza tener conto della forza forte, si pongono in fila 15 protoni e 15 neutroni.
Sapendo che hanno entrambi r=1fm, quanto è lunga in micron la catena?


[l=2,5*10-8um]
01-04-2009 08:36
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13) Tenendo conto delle cifre signifcative, se a=0,011m e b=9,9999m, quando vale c=2*pigreco*a/b ?


[c=6,9*10^-3]
01-04-2009 08:37
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