AHMIRBROWN123
11.09.2019 •
Physics
To make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. a steel rivet 1.871 cm in diameter is to be placed in a hole 1.869 cm in diameter in a metal at 24 ∘c.to what temperature must the rivet be cooled if it is to fit in the hole?
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Ответ:
Explanation:
The steel rivet is going to retract due to temperature change:
D are the diameter
: thermal coefficient of expansion, for steel =12*10^(-6)/°C
We know the diameters and the final temperature equal 24°C
so:
Ответ:
Select the statements that describe a vector. Check all that apply.
2,3,and 5 are the correct answers!
Vectors have a size and a direction.
Vectors are indicated with arrows.
Vectors can have positive or negative values.