Question

small fish is in the mouth of big fish.find v​

Answer 1

Answer:

External anatomy of a bony fish (Hector's lanternfish)

1. operculum (gill cover), 2. lateral line, 3. dorsal fin, 4. adipose fin,

5. caudal peduncle, 6. caudal fin, 7. anal fin, 8. photophores

9. pelvic fins (paired), 10. pectoral fins (paired)

Internal anatomy of a bony fish

Fish anatomy is the study of the form or morphology of fishes. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish.[1] In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish.

The anatomy of fish is often shaped by the physical characteristics of water, the medium in which fish live. Water is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs more light than air does. The body of a fish is divided into a head, trunk and tail, although the divisions between the three are not always externally visible. The skeleton, which forms the support structure inside the fish, is either made of cartilage, in cartilaginous fish, or bone in bony fish. The main skeletal element is the vertebral column, composed of articulating vertebrae which are lightweight yet strong. The ribs attach to the spine and there are no limbs or limb girdles. The main external features of the fish, the fins, are composed of either bony or soft spines called rays which, with the exception of the caudal fins, have no direct connection with the spine. They are supported by the muscles which compose the main part of the trunk.[2] The heart has two chambers and pumps the blood through the respiratory surfaces of the gills and on round the body in a single circulatory loop.[3] The eyes are adapted for seeing underwater and have only local vision. There is an inner ear but no external or middle ear. Low frequency vibrations are detected by the lateral line system of sense organs that run along the length of the sides of fish, and these respond to nearby movements and to changes in water pressure.[2]

Explanation:

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Answer 2

Given:

Mass of big fish, m₁= 6m

Initial velocity of big fish,v₁= 1 m/s

Mass of small fish, m₂= 1 kg

Initial velocity of small fish,v₂= -17 m/s

To Find:

Value of v or combined velocity of both fish after collision

Solution:

We know that,

• If two bodies moving in same line towards each other collide, then combined velocity or common velocity V is given by

$\pink{\underline{\boxed{\bf{V=\dfrac{m_{1}v_{1}+m_{2}v_{2}}{m_{1}+m_{2}}}}}}$

where,

m₁ is mass of first body

v₁ is initial velocity of first body

m₂ is mass of second body

v₂ is initial velocity of second body

$\rule{190}{1}$

Note: Here direction of velocity of big fish is taken positive and direction of velocity of small fish is taken negative.

On applying above formula, we get

$\longrightarrow\rm{v=\dfrac{m_{1}v_{1}+m_{2}v_{2}}{m_{1}+m_{2}}}$

$\longrightarrow\rm{v=\dfrac{6m\times1+m\times(-0.5)}{6m+m}}$

$\longrightarrow\rm{v=\dfrac{6m-0.5m}{7m}}$

$\longrightarrow\rm{v=\dfrac{\cancel{5.5m}}{\cancel{7m}}}$

$\longrightarrow\rm\green{v=0.79\ m/s}$

Hence, the value of v is 0.79 m/s.