Aaceleração de uma partícula em um escoamento em regime perman...

Aaceleração de uma partícula em um escoamento em regime permanente não é necessariamente igual a zero. mesmo em regime permanente, a partícula pode estar submetida a uma aceleração convectiva, que ocorre devido a geometria do seu escoamento. baseando-se na formula da velocidade: stack a subscript p with rightwards arrow on top equals fraction numerator d v with rightwards arrow on top over denominator d t end fraction equals u fraction numerator partial differential v with rightwards arrow on top over denominator partial differential x end fraction plus v fraction numerator partial differential v with rightwards arrow on top over denominator partial differential y end fraction plus w fraction numerator partial differential v with rightwards arrow on top over denominator partial differential z end fraction plus fraction numerator partial differential v with rightwards arrow on top over denominator partial differential t end fraction julgue os itens abaixo. i - fraction numerator partial differential v with rightwards arrow on top over denominator partial differential t end fraction space minus space r e p r e s e n t a space a space a c e l e r a ç ã o space t o t a l space d a space p a r t i c u l a. ii - fraction numerator d v with rightwards arrow on top over denominator d t end fraction minus space d e t e r m i n a space a space a c e l e r a ç ã o space l o c a l. space iii - u fraction numerator partial differential v with rightwards arrow on top over denominator partial differential x end fraction plus v fraction numerator partial differential v with rightwards arrow on top over denominator partial differential y end fraction plus w fraction numerator partial differential v with rightwards arrow on top over denominator partial differential z end fraction space minus space r e p r e s e n t a space a space a c e l e r a ç ã o space c o n v e c t i v a. assinale a alternativa que apresenta apenas as proposições corretas. escolha uma:
a. i, ii e iii.
b. i e ii.
c. iii. correto
d. ii e iii.
e. i e iii.

resposta certa : c. iii.