Questions

Light travels Faster than Sound.

Light :

1. Light doesn't require a medium to travel.

2. It travels in the vaccum with the speed of 1,86,000 miles per second.

Sound:

1. Sound rquire a medium.

2. It travels in the Air with the speed of 340 meters per second.

3. It travels Faster in Water than in Air.

4. It travels Faster in Steel than in Water. 

VOIP is an acronym for Voice Over Internet Protocol, or in more common terms phone service over the Internet.

Voice over Internet Protocol is a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP rather than by traditional circuit transmissions of the PSTN.

Here in the given options, Skype is the only voice service that enables us to talk over internet.

A fixture is defined as a device which holds and locates a workpiece and guides and controls one or more cutting tools.

Valentina Tereshkova is the first woman to have flown into space

The world's tallest twisted tower, the Infinity Tower was launched in Dubai Marina on 10 June 2013.

American Independence was acknowledged by England in 1783 in the treaty of Paris and George Washington was elected the first President of USA.

Hard disk is coated in both side with Magnetic metallic oxide.