Questions

Beats means the periodic increase and decrease in loudness heard when two notes of nearly the same frequency are sounded simultaneously.

Magnesium is dissolved in seawater at a concentration of about 1,000 parts per million and is the only metal directly extracted from seawater.

The main use of salt in the diet is to produce in small amounts the hydrochloric acid required for the digestion of food.

1.Logout of your computer each time you have finished using it

2.Install and use anti-virus software on your computer 

3.Do not use emails on your machine

4.Make sure all your files are safely stored to your floppy disks

Mutex is the short form for ‘Mutual Exclusion object’. A mutex allows multiple threads for sharing the same resource. The resource can be file. A mutex with a unique name is created at the time of starting a program. A mutex must be locked from other threads, when any thread that needs the resource. When the data is no longer used / needed, the mutex is set to unlock.