All substances have characteristic properties. if one of these properties can be observed without changing the identity of the substance, it must be a:
( explain! )

universal property

physical property

biological property

chemical property

The correct option is PHYSICAL PROPERTIES.

Objects usually have two different types of properties, these are physical and chemical properties. Physical properties of objects are those properties that can be observed without changing the identity of the objects. An example of these is density. Chemical properties on the other hands are those properties that can only be observed by changing the identity of the object.

the answer is c i took the test

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.