Muscles function only by contracting. This makes it necessary for one end of the muscle to be fixed and the other mobile.
Take the bicep for example.
Its origin is at the shoulder and its two heads connect to the bones of the forearm, the radius and ulna.
Now, had the muscle not been fixed at one end, and contracted, it would pull both our shoulder and forearm together resulting in an ineffective movement. The desired motion is to lift the forearm (proximal and distal movement) which can only be achieved if the bicep is fixed at the shoulder and allowed to move at the forearm.
Epithelial cells are classified by the following three factors : 1. Shape . 2. Stratification. 3.Specialization . It's a main aspect to the mehe family , and plays a huge part in helping the movement of bobbing your head.
Metals are giant structures of atoms held together by metallic bonds. “Giant” implies that large but variable numbers of Atoms are involved - depending on the size of the bits of metal. most metals are close packed - that is, they fit as many items as possible into the available volume.
Answer:
Explanation:
According to Faraday-Newmann-Lenz, the induced emf in the loop is given by:
(1)
where 
is the rate of variation of the magnetic flux through the loop.
We know that the magnetic flux through the loop is given by
where B is the magnetic field and A is the area of the loop. Since the magnetic field is constant, we can write the variation of flux as
So eq.(1) becomes
and the problem gives us:
is the magnetic field
is the rate at which the area changes
Substituting into the equation, we find
