1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
blagie [28]
4 years ago
5

Squids propel themselves by expelling water. They do this by keeping water in a cavity and then suddenly contracting the cavity

to force out the water through an opening. A 9 kg squid (including the water in the cavity) at rest suddenly sees a dangerous predator. If the squid expels 2 kg of water out of its body with a speed of 8 m/s, what would be its own escape speed
Physics
1 answer:
Musya8 [376]4 years ago
8 0

Answer:

v_squid = - 2,286 m / s

Explanation:

This exercise can be solved using conservation of the moment, the system is made up of the squid plus the water inside, therefore the force to expel the water is an internal force and the moment is conserved.

Initial moment. Before expelling the water

          p₀ = 0

the squid is at rest

Final moment. After expelling the water

         p_{f} = M V_squid + m v_water

         p₀ = p_{f}

          0 = M V_squid + m v_water

           c_squid = -m v_water / M

The mass of the squid without water is

            M = 9 -2 = 7 kg

let's calculate

           v_squid = 2 8/7

           v_squid = - 2,286 m / s

The negative sign indicates that the squid is moving in the opposite direction of the water

You might be interested in
A boy is looking into a plane mirror .His nose is 30 cm in front of the mirror .How far is his nose from where its image appears
natima [27]

Answer:

60cm

Explanation:

30+30=60

8 0
3 years ago
What church church actions angered reformers and led to the reformation
Leya [2.2K]
 catholic I did this a while back but wyd you mark it physics


5 0
3 years ago
On the surface of the earth, weight is calculated by:
sdas [7]

On the surface of the earth, weight is calculated by multiplying mass and gravity.

 

<span>Because we know the radius of the Earth, we can use the Law of Universal Gravitation to calculate the mass of the Earth in terms of the gravitational force on an object (its weight) at the Earth's surface, using the radius of the Earth as the distance. We also need the Constant of Proportionality in the Law of Universal Gravitation, G. This value was experimentally determined by Henry Cavendish in the 18th century to be the extemely small force of 6.67 x 10</span>-11 Newtons between two objects weighing one kilogram each and separated by one meter. Cavendish determined this constant by accurately measuring the horizontal force between metal spheres in an experiment sometimes referred to as "weighing the earth."

 

 

The correct answer between all the choices given is the third choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

8 0
4 years ago
Read 2 more answers
How is heat transferred?
leonid [27]

Answer:

convection, conduction, and radiation

Explanation:

4 0
3 years ago
Read 2 more answers
[ ] is the displacement of an object during a specific unit of time <br><br>whats the answer? ​
Novay_Z [31]
Velocity is the displacement of an object during a specific unit of time. Explanation: The standard unit of velocity is metre per second.

HOPE IT HELPS
4 0
3 years ago
Read 2 more answers
Other questions:
  • In a carnival ride, passengers stand with their backs against the wall of a cylinder. The cylinder is set into rotation and the
    9·1 answer
  • A slab of insulating material has thickness 2d and is oriented so that its faces are parallel to the yz-plane and given by the p
    13·1 answer
  • How does chronic stress physically change the brain?
    9·1 answer
  • A person walks 2 miles every day to work, leaving her front porch at 7:00 A.M. and arriving at work at 7:30 A.M. ON the way home
    15·1 answer
  • why should it take significantly more energy to move a beam of alpha particles than a beam of beta minus particles
    9·1 answer
  • 7.
    11·2 answers
  • A stunt pilot of mass 49.0 kg who has been diving her airplane vertically pulls out of the dive by changing her course to a circ
    14·1 answer
  • The centripetal force acting on a satellite in orbit
    8·2 answers
  • Glass is called fourth state of matter.give reasons<br>​
    6·1 answer
  • A block of wood is floating in a pool of water. How does the volume of water displaced by the block compare to the volume of the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!