161
Question: Calculate the density of the circus dumbbell?
Answer: ______________________________________________________
Task 20.
Birch Leaves
Leaf’s weight, which was fell from a birch is 0.1 g, and
the weight of the cat
Yashka, dreaming about birds and fell from the same birch is 10 kg.
Question
: How many times the force of gravity operating on the falling leaf is
less than the one operating on the falling cat?
Answer:_______________________________________________________
Task 21.
Shuttle Bus uses 60 kg of gasoline per day. How many cubic meters is gassing
in the city, polluting the environment? The density of the gas at a temperature of 0 °
C is 0,002 kg / m
3
. What methods of protection of atmospheric air from pollution by
emissions from motor vehicles can you name?
Answer: ______________________________________________________
Task 22. skiing run
To make a turn on your skis it is necessary to make fairly complex body
movements. For example, when you climb down mountain, in
the normal position of
the body skis goes straight. The movement of the body forward or backward results
in the turning.
Question: Explain why? What direction is the turning
happening if the body
deviation is forward and back?
Достарыңызбен бөлісу: 
