Alex who has a mass of 100-kg skateboards at 10.0 m/s smacks into a brick wall and comes to a dead stop in 0.2 s. His sudden deceleration is
A. ?500 m/s2.
B. ?5.0 m/s2.
C. ?50 m/s2.
D. ?9.8 m/s2.
Answer: C
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Referring to the diagram, which of the following types of fronts is represented as a side view?
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?
?
A. cold front B. occluded front C. warm front D. stationary front
When generally comparing life in suburban sprawl and life in the inner city, people living in the inner city
A) walk more and shop locally. B) have larger homes and better city services. C) experience lower crime rates. D) enjoy lower-density residential living.
Passive solar technologies ________
A) use the energy of sunlight without relying on electrical or mechanical devices B) use mechanical devices to heat water and buildings or electrical devices to generate electricity C) use mirrors to concentrate the sun's rays on a tower or a series of pipes holding water D) use photovoltaic cells to produce light energy E) use silicon wafers to generate light energy
Which property tells you if a gas will rise and dissipate?
a. Specific gravity b. Vapor density c. Explosive limits d. Flash point