Questions

Sound is a mechanical vibration and needs a medium for propagation. The higher the density of the medium, the faster the sound travels. So, sound cannot travel through vacuum.

As the sound travels faster in solids than liquids and gases, sound travels faster in the glass than Air and water.

Dispur will make CT scans, X-rays and blood tests free in all government hospitals in Assam except those in the medical colleges. Health minister Himanta Biswa Sarma informed the Assembly during question hour that chief minister Sarbananda Sonowal will inaugurate the new scheme on May 11. The service will be outsourced to a private organisation but the cost will be borne by the government. The free service – not for medical colleges – will be started with 35 hospitals and expanded to 500 smaller health centres.

Former cricketer Ravi Shastri has been named the New coach of Team India on a Two year contract.

This will be Shastri's second stint with the team, after being the director from 2014 - 2016.

Yes, a promise can be broken without being held.

Tortoise