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rotates, but in an opposite direction which rotated when the skis are in the normal
position.
Task 24. Squid
Squid is the largest invertebrate inhabitants of the ocean depths. It moves on the
principle of jet propulsion, absorbing water and then with great
force pushing it
through a special hole - "funnel", and at a high speed (about 70 km \ h) pushes back.
At
the same time, all ten tentacles squid collected in node over its 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 explain?
Answer:______________________________________________________
Task 25.Fish
Experienced fishers know that
the sound of oars, knock on boats
board frighten
off 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 the smallest to the 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:_______________________________________________________
Достарыңызбен бөлісу: 
