The half-life of Radium-226 is 1590 years. If a sample contains 400 mg, how many mg will remain after 3000 years

thats how its supposed to be

answer7,570,82356 cubic centimeters;

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.