When the amplitude of a longitudinal wave the particles in the medium
in the compressions.
A. decreases, get closer together
B. increases, get farther apart
OC. increases, get closer together
D. decreases, get farther apart

your answer would be a. 12.5 kg

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.

it is reliable if two scientists recorded it