A motorist travels for 3.0 h at 80 km/h and 4.0 h at 60 km/h. What is her average speed for the trip?
A) 74 km/h
B) 140 km/h
C) 70 km/h
D) 73 km/h
E) 69 km/h
E
You might also like to view...
If you balance a broom horizontally on one finger, the center of gravity of the broom will be above your finger, closer to the bristles end than the handle end
If you saw the broom in two pieces at that point and weigh the two parts on a scale, you'll find that the heavier part is the A) bristles part. B) handle part. C) both the same weight
The polarization of sunlight is greatest at
A) sunrise. B) midday. C) both sunrise and sunset. D) sunset.
According to Newtonian physics, and to the philosophical views usually associated with Newtonian physics, the workings of the physical universe are
A) predetermined in their overall outlines, but with certain details [such as human decision-making] left to chance or to free will. B) completely a matter of chance. C) an anti-American plot. D) completely predetermined, just like the workings of a clock. E) partially pre-determined and partially a matter of chance.
The image formed by a diverging spherical lens is always
a. upright. b. reduced. c. virtual. d. all of these.