If the requirement is to erase all the data from the hard disk drive on the Mac, then it's best to use a tool known as the Disk Utility. This will delete all the files and volumes on the hard drive. The Disk Utility offers four options:
1. Don't erase data2, Zero out Data3. 7-Pass Erase4. 35-Pass Erase
On the other hand, if the requirement is to delete individual files, then the best thing to do is to highlight the file you want to delete, right-click on it and "Move to trash".
On single and double overhead cam engines, the cams are driven by the crankshaft, via either a belt or chain called the timing belt or timing chain. These belts and chains need to be replaced or adjusted at regular intervals.
=sum(1+1) it's a simple formula and won't change from any cells. Another you can do is to put a value in a specific cell, let's say, C3. Then have a formula that says, =sum(C3+2). But if you REALLY wanna impress someone - put a value in A1 - anything at all. Then put this formula in any other cell you want. If you change cells, you get a different answer. If you change the # in A1, you get different answers, all thanks to the RANDom function. =SUM((RAND()*100)+A1)
Answer:
Kindly see explanation
Explanation: The operating system is a huge part of a computer system which plays a an invaluable role in the working of computer programs, hardwares and influences the overall experience of the user. It operating system serves as the interface between the computer hardware itself and the user who may wish to perform different tasks using a computer. In other to teach and learn, it is necessary to input and also obtain output, store our files and process and most essentially one may need to install application programs or softwares, all these functions are made possible with the help of an operating system. In essence, a system without an operating system can perform very little to no function at all. So basically teaching and learning becomes difficult. Teaching and Learning tools such as video, writing and other application softwares cannot be installed without an operating system and thus teaching or learning becomes impossible in it's absence.
Answer & Explanation:
Efficiency in the virtual world is closely related to that of the real world. In programming it is how fast an application run and robust(concise and small) it is coded. similarly efficiency is used when also explaining how fast you can manage your time while performing a task (like production). so in terms of similarity we will consider speed but for difference you may have to add other parameters when considering efficiency outside of programming.
