The force that allows you to walk across a floor is
A. a combination of external forces.
B. friction.
C. simply your weight, mg.
D. both your weight and the normal force.
Answer: B
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Intrusive igneous (plutonic) rocks:a
solidify below the surface of the ground. b. solidify above the surface of the ground. c. form by crystallization of magmas intruded into surrounding rocks. d. solidify below the ground AND form by crystallizaion and intrusion of magma into surrounding rocks e. solidify above the ground AND form by crystallizaion and intrusion of magma into surrounding rocks
The NAD+/NAD and FAD/FADH2 systems transport which of the following?
A) electrons B) hydrogen ions C) both a and b D) neither a nor b
The greatest general problem with suburbs is ________
A) that they spread environmental impact over a larger area B) that they decrease water quality C) the lack of resources D) the high population density E) the lack of nearby shopping
Most of the land in South and East Asia is used for subsistence agriculture
a. True b. False Indicate whether the statement is true or false