Sound is measured in
A) Hertz
B) Decibel
C) ppm
D) none of the above
Correct Answer:
Verified
Q3: During fire, the human body can withstand
Q4: The content of oxygen is normally _%
Q5: The hazard with concerns damage or destruction
Q6: It is found that _ are not
Q7: Noise is
A)an unwanted noise
B)an irritant
C)a source of
Q9: What is called for the collection of
Q10: What is called for the method of
Q11: How many methods of rainwater harvesting are
Q12: Why should people implement rainwater harvesting?
A)In order
Q13: Rainwater harvesting increases the groundwater levels.
A)True
B)False
C)none
D)all
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