Answer: I think its air pollution and Global warming
Explanation:
The answer is ectopic pregnancy..this is the answer..
The sugar pill serves as a control.
The control in experiments is a sample that remains the same throughout the experiment and it is used to compare the results of the main experiment to. It serves to guarantee that changes noted in the experiment are from the variables introduced and not something else.
Answer:
is 26.25 N
Explanation:
Given that: 
= 20 N, 
= 17 N.
This implies that the two forces are acting at right angle to each other. Thus applying the Pythagoras theorem, we have;
= 
= 
= 
= 
= 26.2488
= 26.25 N
The net force is 26.25 N.
While scientists have made enormous discoveries, there is always more to learn. Knowledge is built on and reviewed. Sometimes new information reveals an error in understanding from the past. The study of how the world works is always ongoing.
