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Task 24. Squid
Squid is the largest invertebrate inhabitants of the ocean depths. He moves on
the principle of jet propulsion, absorbing water and then with great force pushing it
through a special hole - "funnel", and at high speed (about 70 km \ h) moves in jerks
back. At the same time, all ten tentacles squid collected in over your head node and it
gets streamlined.
The engineers have created an engine similar to the engine squid. It is called
water jet. There the water is swallowing up into the camera. And then it is ejected
from the nozzle; the ship is moving in the opposite direction of the jet ejection. The
water is swallowing by a conventional gasoline or diesel motor.
Question: Try to explane?
Answer:______________________________________________________
Task 25.Fish
Experienced anglers know that the sound of oars, knock on board boats deters
many fish, but a loud conversation on the banks of the Angara River don’t worried
them.
Question: Why?
Answer:______________________________________________________
Task 26. Structural framework of material world
Specify the correct sequence (from smallest to largest) in the structural hierarchy
of the microcosm:
A. elementary particles;
B. atoms;
C atomic nuclei;
D. molecules
•
А–В–С– D
•
С–А–В– D
•
D –
В–С–А
•
А–С–В– D
Answer:_______________________________________________________
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