Answer:
D.
They break down dead organisms.
Explanation:
Answer:
The force needed to move a boy and his wheelchair with a combined mass of 30kg at 0.4 meters per square second is 12 newton.
Explanation:
- According to Newton's second law based motion "the moving object's acceleration is based upon two terms - one is the total force acting upon that object and the other one is the net mass of the object."
- In mathematical term, F=ma. where F= force, m= mass, a= acceleration.
- So, by performing the calculation,
- 12N force will move the boy along with the wheel chair.
The next eclipse in the Saros cycle will be at 22nd of August 2017.
<h3>What is an eclipse?</h3>
Eclipse is an astronomical phenomenon marked by the total or partial darkening of a star due to the passage of some celestial body in front of a light source. There are two categories of eclipse: the solar eclipse and the lunar eclipse.
With that being said it is possible to notice that all eclipses are happening with an interval of 18 years. So as the last eclipse was in 1999, the next one will be in 2017. As for the day, it is possible to notice that they are happening 11 days after the last one. So as the last one was in 11th of August, the next one will be in 22nd of August.
See more about astronomy at: brainly.com/question/14375304
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D. Bacteria
Nitrogen-fixing bacteria found in both the soil and root nodules of leguminous plants fix nitrogen into a form that can be used by plants.
