exam 2 closed Flashcards
1
Q
what is an equation for weight
A
weight=gamma*vol
gamma is specific weight
2
Q
what is the buoyancy equation
A
Fb=weight displaced by fluid=pfluidgvolsolid
3
Q
What time of day do hot air balloons fly best
A
in the morning because the air is cool which provides a greater difference compared to the inside of the balloon. The air inside the balloon is less dense which makes it rise.
4
Q
general energy balance eqn
A
delta(u+p/ro+gz+v^2/2)=dQ/dm+dWnf/dm
5
Q
what is āuā
A
internal energy
6
Q
what is gz
A
potential energy
7
Q
what is v^2/2
A
kinetic energy
8
Q
what is dQ/dm
A
heat flow
9
Q
what is dWnf/dm
A
nonflow work
10
Q
what two terms make up friction loss in the Bernoulli eqn
A
deltaU-dQ/dm
