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.
______________ is used for transferring files from one host to another over a TCP-based network?
Which of these items does NOT make a good password?
A ________ is a graphical control element which contains drop – down menus.
Which of the following is used in second generation computer?
Which short cut keys is used to centre a paragraph?
Which of the following keys is not on the number keypads?
Using a PC to copy software or data from a server, it is known as:
The system of satellites used to determine any position on the Earth is known as:
Apple likes to name versions of Mac OS X after big cats. Which cat was version 10.3?
Which one does not allow Execution due to any waiting event?
