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pychu [463]
3 years ago
11

To study the dependant variable, a scientist must A. manipulate the independent variable B. have more than one control group C.

manipulate the dependent variable D. have more than one experimental group ​
Physics
1 answer:
ankoles [38]3 years ago
6 0

Answer:

A. Manipulate the Independent Variable

Explanation:

How I like to remember is (I)ndependent " I change it"

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Answer:

q = 3.87 x 10⁵ C

Explanation:

given,

Electric field, E = 8.60 x 10¹ = 86 N/C

radius of earth, R = 6371 Km = 6.371 x 10⁶ m

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E =\dfrac{kq}{r^2}

q =\dfrac{Er^2}{k}

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q =\dfrac{86\times (6.371\times 10^6)^2}{9\times 10^{9}}

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