When a new substance has formed, has a physical or chemical) change occurred? (4 Points)

A) chemical

B) physical

A) Chemical Change

Explanation:

A chemical change create a NEW type of matter that CANNOT be reversed!

Example: Spolied milk

Example: Green tomatoe turns red

Hope it’s helpful! :)

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.