Question
A metal plate with a circular hole at the centre is
heated. What will happen to the area of the hole?Solution
Assuming the disc is uniform and isotropic (the same in different directions), the hole will expand in the same ratio as the metal. It is because the thermal expansion equation applies to all lengths associated with the metal, including the circumference of the hole, since the edge of the hole is made out of metal. And if the circumference of the hole expands, so does the diameter.
1) As we approach
2) the gate, I here the
3) guard stamp his feet
4) and hear the cocking of a weapon.
5) No error
...People will only contribute (A)/to the extent that (B)/their most personal information (C)/are protected (D).
Identify the segment that contains a grammatical error. If there is no error, select 'No error'.
There are several ways of increase production fr...
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As the cases surges, (A)/the State quick updated (B)/their triage and treatment protocol (C)/to guide its response (D)/ to the new variant (E).
...He built the theatre as a tribute to his rootings (1)/ and the thought of it outlasting him, (2)/ would surely have given him the greatest joy. (3)/ No ...
He denied to have (A)/any part in writing the information packs (B)/and advertisements and said they (C)/were largely available when he arrived (D).
It is the ability to continuously (A) / refurbish and nuance all facets of his (B) / game that allows Roger Federer to outcompete (C) / and outlive much...
Restoring soil health would help at mitigate the effects of climate change. Â
The company’s profits (1)/ have grown steadily (2)/ since it launched (3)/ the new product last year.(4)Â
