What distinguishes brownfields from other land being considered for development?

Brownfields are properties that are potentially polluted. Unlike other properties, their development may be complicated due to environmental laws and regulations. If they must be remediated before development or redevelopment, this can significantly increase the cost of the project and result in developers seeking alternate, less expensive locations.

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.