Answer:
23
21.7391304348 m
Explanation:
L = Initial length = 500 m
= Change in temperature = 40-(-35)
= Coefficient of thermal expansion = 
Change in length is given by

The change in length is 0.45 m
The number of joints would be

The number of joints is 23
Each bridge section length would be

The length of each bridge section would be 21.7391304348 m
Answer:
90.78 rev/min
Explanation:
In first place, we have to do the force balance to determine the minimum angular speed required to avoid slipping. The forces acting here are friction and the force due to circular movement, that is centripetal force. Then, we have:

μmg=mRω^2
ω=
Then, replacing the given values in the expression we have the following result:
ω=1.51 rev/s*60s=90.78 rev/min
Answer:
Potential energy will be
Explanation:
We have given the height of the basin is h = 6 m
Area of the basin 
Volume 
Density 
We know that mass is given by 
We know that potential energy is given by 
Answer:
Please mark as Brainliest....
Explanation:
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Answer:
Wind
Explanation:
I had this question on one of my tests, and I got it right