Grasp It

How do we fill tyres with nitrogen? W hile we typically fill our car tyres with normal air, Formula 1 teams and even airlines fill their vehicles’ tyres with purified nitrogen. They do this to boost performance and reliability, so should we be doing the same? The air you pump into your tyres is actually mostly nitrogen anyway – 78 % of it to be exact – but it’s the other 22 % that is the problem. Less than one percent is water vapour, which at very low temperatures, such as those at high altitudes, and very high temperatures, such as those produced when driving very fast can freeze or expand to make the tyre pressure unstable. For normal driving though, this shouldn’t be a problem, so dryer nitrogen won’t make much difference. However, air is also 21 percent oxygen, and as oxygen molecules are so tiny, they drip through the tyre rubber over time. Nitrogen molecules on the other hand, are bigger, so they stay inside the rubber for longer ...

Exception Handling Writing error-free programs is the main objective of programmers. However, whenever a program is written for the first time, it usually contains errors. These errors are classified  mainly into three types, namely, compile-time errors, logical errors and run time errors. The compile-time errors and logical errors can be detected and removed by exhaustive testing and debugging. However, run-time errors are difficult to detect and trap. The run-time errors are usually referred to as exceptions. An exception is an unexpected event that occurs during the execution of a program and alters the normal flow of the program or terminates the program abnormally. The errors that can cause exceptions can range from simple programming errors, such as opening an invalid file for reading, invalid array index, etc., to serious errors such as running out of memory. Exceptions can be classified into two types, namely, synchronous exc...