If a flow is unsteady, its ____ may change with time at a given location.（ ）。
A: Density
B: All of the above
C: Temperature
D: Velocity
A: Density
B: All of the above
C: Temperature
D: Velocity
举一反三
- If a flow is unsteady, its ____ may change with time at a given location. ( ) A: Velocity B: Temperature C: Density D: Pressure E: All of the above
- How can we disrupt polar interactions?（） A: Add salts B: Change the PH C: Change temperature D: All of the above
- An EOS relates volume （or density） to （ ）。 A: temperature B: velocity C: pressure D: viscosity
- According to the CISG, an offeree may withdraw his acceptance of an<br/>offer ____ A: any time before it is dispatched B: any time before it is received C: simultaneous with its receipt D: All of the above
- The main physical properties of the fluid are （ ） A: density B: compressibility C: viscosity D: velocity E: flow rate