Pls answer

in the formula:
fm=k m1m2/r2
r is the distance:

a) from the north pole
b) between poles m1 and m2
c) from m1 to the nearest magnetic body
d) between the magnetic lines of force

Which of the following is not a part of a wave? question 2 options: a: frequency b: refraction c: wavelength d: amplitude (whoever answers correctly first gets brainiest! ) ~kayla

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

Is a copper wire a conductor or insulator?