What is drag? What causes it? Why do we usually try to minimize it?
What will be an ideal response?
The force a flowing fluid exerts on a body in the flow direction is called drag. Drag is caused by friction between the fluid and the solid surface, and the pressure difference between the front and back of the body. We try to minimize drag in order to reduce fuel consumption in vehicles, improve safety and durability of structures subjected to high winds, and to reduce noise and vibration.
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Match each term with the correct statement below.
A. A search that is constrained to a specific focus B. Forensic techniques with a computer system as the source of evidence C. Forensic techniques with a digital electronic device as the source of evidence D. Regulates interception of electronic and oral communications E. Protects journalists from having to turn over material before public dissemination F. Identifies sources of relevant information on a first response team G. Maintains control of the field evidence log on a first response team H. The only forensic team field note that can be done in pencil I. Identifies each item collected by forensic team by a filename number
Below are five properties, with an example of the units in which that property could be expressed. Which units are wrong for the property?
A. Specific volume, in m3/kg B. Molar enthalpy, in kJ/mol C. Specific internal energy, in kJ/mol D. Enthalpy, in N•m E. The parameter “a” in the van der Waals equation, in Pa•m6/mol2
Red blood cells get their red color from:
A. myoglobin B. hemoglobin C. carbon dioxide D. oxygen
The Motor Carrier Safety Improvement Act of 1999 established the Federal Motor Carrier Safety Administration as a separate agency from the Department of Transportation.
Answer the following statement true (T) or false (F)