Eratosthenes determined the circumference of Earth by conducting an experiment. Plus his steps in order as they correlate to the scientific method.

the answer is barium and copper bromide

plasma - state of matter made up of electrically charged particles

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.