Questions

As the frequency of sound is higher, women have shriller voices than men.

The shrillness or pitch of a sound is determined by its frequency. The higher the pitch shriller the voice. As the sounds produced by vocal cords of women are higher than men so women have shriller voices than men. Because their vocal cord is of smaller size. As their vocal cord is more stretched than men's.

The main parties involved in the IR system are: 

i.) Employers – They are the ones who possess the rights to hire the employees and remove them. They also possess the rights to relocate, close or merge the business. They can opt for technological changes as and when they see it in the interest of business. 

ii.) Employees – They are actually the ones who keep the business moving. They possess the rights to voice their opinions and feelings while striving for betterment. They usually form the unions to negotiate with the employers.

iii.) Government – Government is the one who influences the IR system with laws, rules, agreements, awards of court etc. They also include third parties & labour and tribunal courts to manage the IR system.

If you read newspaper daily, then you may be aware of the four coloured dots on the corner of the newspaper. 

The four dots CMYK — blue (Cyan), pink (Magenta), Yellow and black (Kalio) are registration marks used during printing to help ensure the print is aligned properly. Any colour can be obtained by adding the correct proportion of these four colours.

CMYK is used as a base for the colours used in printing newspapers, and these four colours are often printed on the paper in either a heart, dot, or square shape.

To print an image, the plates of all these colours are laid out on a page separately and lined up in the same spot while printing. If those four dots are blur or you find the colours overlapping on the image it means the printing is not good. To print an accurate and perfect image, the colors and shape must be arranged precisely and must be claear sharp in order to get the best output.

That's why CMYK is also called registration mark. As physically checking all the pages of the paper is not possible for a printer who prints number of news papers daily, he just checks these dots.