The region where electrically charged ions are formed as a result of the absorption of solar energy is called the
a.

troposphere.

c.

ionosphere.
b.

lithosphere.

d.

exosphere.

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o