Questions

River.

It always runs  or flows but never walks.

It will sound like murmuring but never talks.

It has bed but never sleeps.

It has mouth but never eats.

1 atm: It was originally defined as the pressure exerted by 760 mm of mercury at 0 °C and standard gravity (g = 9.80665 m/s2).

Megahertz is used to measure wave frequencies, as well as the speed of microprocessors. One MHz represents one million cycles per second. The speed of microprocessors, called the clock speed.

Lala Lajpat Rai, popularly known as Punjab Kesari was an Indian Freedom Fighter who gave the safety valve theory for Indian National Congress in 1916 in a daily news paper paper 'Young India'. 

It was said that the INC was started by Viceroy Lord Dufferin with the help of an ex Civil Services member as a 'Safety Valve' against the popular discontent.

BRICS is basically an association of 5 major emerging national economies: Brazil, Russia,China, India and South Africa.

BRIC was coined in Foreign Ministerial meeting of Brazil,Russia,China and India in Newyork in Sept 2006. BRIC officialy came in existance in 2009 at Yekaterinburg,Russia.

At start group was named as BRIC, but after being formally invited by the BRIC countries to join the group, South Africa officially became a member nation on 24 December 2010, and the group was renamed BRICS.

The one word substitute for To slap with a flat object is SWAT.