HSN002 – Mecânica dos Fluidos Faculdade de Engenharia Profª Maria Helena Rodrigues Gomes Universidade Federal de Juiz de Fora 43 The law of conserv...

HSN002 – Mecânica dos Fluidos Faculdade de Engenharia Profª Maria Helena Rodrigues Gomes Universidade Federal de Juiz de Fora 43 The law of conservation of mass implies: 222111 AvAv  = Canceling the terms involving mass flow and internal energy, we have: 2 2 2 2 1 2 1 1 2 v 2 v p gz p gz ++=+ g p z g p z  2 2 2 2 1 2 1 1 2g v 2g v ++=+ The relations presented in equation (3.31) are known as Bernoulli's equation. It can be expressed by considering that along the flow the sum of the terms is equal to a constant value. All terms in equation (3.33) have a length dimension and these quantities are called loads: 2g v2 = kinetic load g p ρ1 = pressure load z = position load 3.7 - Impulsion of Movements In several fluid mechanics problems, changes occur in the magnitude and/or direction of the velocity of a moving fluid. The determination of the force magnitude required to produce the change in fluid velocity is given by the Impulse and Momentum Theorem. The impulse of a force is given by: tFI Δ×=ρρ

The text is about fluid mechanics.
The law of conservation of mass is presented in the text.
Bernoulli's equation is presented in the text.
The Impulse and Momentum Theorem is presented in the text.
a) All affirmations are true.
b) Only affirmations 1, 2 and 3 are true.
c) Only affirmations 1 and 3 are true.
d) Only affirmations 2 and 4 are true.