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.
Which of the following is NOT a valid way to start a formula in Microsoft Excel?
When you want to add special visual or sound effects to the way a slide changes from one to the next during a presentation in PowerPoint, what feature w...
In Microsoft Excel, what is a "PivotTable" primarily used for?
Which tab in the Microsoft Office Ribbon typically contains options for inserting pictures, shapes, charts, and tables?
Which feature in Microsoft PowerPoint allows you to apply a consistent design, including background, color schemes, fonts, and effects, to all slides in...
In Excel, if you enter `=A1+B1` into cell C1 and then drag the fill handle down to C2, what formula will appear in C2?
Which Excel function is used to count the number of cells within a range that meet a single specified criterion?
What is the primary purpose of "Track Changes" in Microsoft Word?
In Microsoft Excel, what is the purpose of the '$' sign in a cell reference (e.g., `$A$1`)?
Which of the following is the default file extension for a Microsoft Word document in recent versions (2007 and later)?
