Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 5 | Science
One Answer Below
Anyone can contribute an answer, even non-tutors.
Anyone can help ?thanks!
Date Posted: 7 years ago
Views: 1182
B cause the bridge expands
(a) on a hot day, the bridge will expand. since one end is fixed, the bridge will expand in the direction which it can move, which will be B.
(b) since the bridge will expand but not able to move at both ends, it will expand and the extra length will accumulate at the center, which causes it to deform.
(b) since the bridge will expand but not able to move at both ends, it will expand and the extra length will accumulate at the center, which causes it to deform.
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
The bridge is made out of steel. Hence during the day, when the steel is exposed the heat, the steel expands.
If both sides were fixed, the metal will continue to expand. If both sides were fixed, the bridge will bend upwards in the center as the metal cannot expand side ways.
It will move towards B as when the metal expands, it expands toward B as the left side of the bridge is fixed. Thus the follower moves in the direction of B.
If both sides were fixed, the metal will continue to expand. If both sides were fixed, the bridge will bend upwards in the center as the metal cannot expand side ways.
It will move towards B as when the metal expands, it expands toward B as the left side of the bridge is fixed. Thus the follower moves in the direction of B.
Date Posted:
7 years ago
Thank you!
360 Tutoring Program