Answer:
remove contamination; pollution ; test ground water and dirt .
The answer is d.... Knife.
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Answer:
the answer should be the third statement
Answer:c
Explanation:
Given
object is falling Freely with an odometer
Suppose it falls with zero initial velocity
so distance fallen in time t is given by

here u=0 and t=time taken

for 

for 

distance traveled in 2 nd sec
for 

distance traveled in 3 rd sec
so we can see that distance traveled in each successive second is increasing
Answer:
C. The number of positive and negative charges can be the same.
Explanation: