Question: If an electric train is moving north at 100mph and a wind is blowing to the west at 10mph, which way does the smoke blow?

Abody of weight 60 kg is standing in a lift the lift going upward with a uniform velocity of 4.9 metre per second slows down and stops in two seconds then apparent weight of the body during the slow down process is

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

How can you increase the strength of an electromagnet?