ATTIVITÀ A sorpasso
** Una motocicletta che viaggia a una velocità di 128 km/h
sorpassa un'automobile ferma. L'automobile parte dopo
un tempo di reazione di 1,25 s e comincia ad accelerare
uniformemente con un'accelerazione di 2,05 m/s2. Dopo
quanto tempo e a che distanza dal punto in cui era ferma,
l'auto raggiunge la moto?
[35,9 s; 1324 m]
10

Arock collection comes from which part of earth?

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1