Answer:
it is 3
Explanation:
because the crack will be open for the magma to come out
I believe that it is electric field
Answer:
beats per second
Explanation:
Number of heart beats = 
time taken = 
now we have
%
%
now rate of heart beat is defined as number of heart beat per unit of time
so we have


so we have

%
beats per second
Answer
10
Explanation:
goes up by 10 each time 10 to 20 to 30