Answer:
it shows examples of types of forces
Explanation:
Young' modulus is the ratio of normal stress to the longitudinal strain. Mathematically, it is given by :
Normal stress is given by force per unit area. Longitudinal strain is the change in length per unit original length.
The mathematical definition of Young's modulus is given by :
..........(1)
Where
is the change in length
F is the force
A is the area of cross section
So, the Young's modulus refers to the change in length of the object. Hence, the correct option is (b) "length".
Explanation:
Below is an attachment containing the solution.
A mold fossil is a 3D example of an object, while a mold fills up with a sediment like mud. The mold fossil is related to the cast fossil because both can hold an organism or part of an organism.