Why do scientists use controlled experiments?

a.)to ensure that the results of their experiments are clear

b.)to ensure that hypotheses are proven correct

c.)to ensure that the responding variable does not change

d.)to ensure that the data collected is related to one changed condition

Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90