. In an earthquake, the roads and underground pipes were all destroyed. Fires and explosions began to occur from the broken leaking gas lines. In this case, what would the fires be called?
A. A man-made disaster
B. The cause of the earthquake
C. The primary agent
D. The secondary agent
Question 2
Of the following disasters, which would probably cause the most suffering?
A. A fire during finals' week in a private residential college
B. A fire in an Alzheimer's unit of an extended-care facility
C. A fire in an outpatient dermatology clinic at a major urban hospital
D. A thunderstorm that downs electrical lines to the local rural hospital
Underground Mining
An ABC fire extinguisher is safe for most fires.
Two water pipes together can fill a certain tank in 6 h
Subsurface mining takes place in underground tunnels
Possible Paths of Earthquake Waves
A 500-kg cannon fires a 4.0-kg projectile with a velocity of 500 m/s relative to