Which of the following can improve your car's gas mileage?

A. Equipment racks

B. Cargo carriers

C. Sports team flags

D. Car aerodynamics

Which type of energy source is usually used by ferries and airplanes?

A certain metal has a resistivity of 1.68 * 10-8 Ω ∙ m. You have a long spool of wire made from this metal. If this wire has a diameter of 0.15 mm, how long should you cut a segment so its resistance will be 15 Ω?

Many radios can be operated either by plugging them into the wall or by using batteries. How can a radio use either source of current?

Which of the sequences below represents the various steels types in order of decreasing hardness? a. High-carbon > Low-carbon > Medium-carbon b. Low-carbon > Medium-carbon > High-carbon c. High-carbon > Medium-carbon > Low-carbon d.

Opposition to current flow, restricts or resists current flow A) voltage B) current C) resistance

The Reynolds number, rhoVD/μ is a very important parameter in fluid mechanics. Determine its value for ethyl alcohol flowing at a velocity of 4 m/s through a 2-in.-diameter pipe.

Work done by a system during a process can be considered as a property of the system. a) True b) False

When the compression process is non-quasi-equilibrium, the molecules before the piston face cannot escape fast enough, forming a high-pressure region in front of the piston. It takes more work to move the piston against this high-pressure region.

hypothetical A-B alloy of composition 40 wt% B-60 wt% A at some temperature is found to consist of mass fractions of 0.66 and 0.34 for the α and β phases, respectively.

10. Which of these requires a wheel alignment after replacement? A. Struts B. Shocks C. Both