How many forces act on an upwardly tossed ball when it reaches the top of its path?
A. One; the force due to gravity.
B. Two; the force due to gravity and the internal force in the ball.
C. Two; gravity and the part of the force given by your hand initially.
D. Three; gravity, the ball's internal force, and a turnaround force.
Answer: A
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________ is a characteristic of the cycle of poverty
A) School absenteeism B) Improper nutrition C) Psychological stress from crowding D) Unemployment E) All of these are found in the cycle of poverty.
Convection
A) does not involve an actual transfer of energy. B) involves potential energy only. C) involves mixing in a fluid. D) is another term for conduction.
When making macaroni and cheese you notice the noodles rising and falling in the boiling water. This is best explained through the process of
A. convection. B. conduction. C. advection. D. radiation.
Which organisms are mainly classified as picoplankton?
a. diatoms b. cyanobacteria
c. coccolithophores d. zooplankton e. dinoflagellates