When we get out of the bed on a very cold morning, we feel that the air of the room is cold. But when we come back after staying out for some time, we feel that the air of the same room is warmer. Why is this?

This is because the air outside is always cooler than the air inside, so after staying outside your body adapts to the cold air, when you come back inside, the cold air is still in you which makes the room seem warmer.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

answer; how far out of place which the object finished relative to the starting location;