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What is the a series of choices between two characteristics that is used to i identify organisms is called a

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1 answer:

azamat3 years ago

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D. dichotomous key is the correct answer

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what is the force needed to move a boy and his wheelchair with a combined mass of 30kg at 0.4 meters per square second

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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, $\bold{\mathrm{F}=30 \times 0.4 \mathrm{N}=12 \mathrm{N}}$
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