Why do the asbestos roof of houses get lifted in hurricane?

A thief jumps from the roof of a house with a box of weight on his head. What will be the. weight of the box as experienced by the thief during jump?

Why do we see water droplets collected on the outer surface of a glass container?

What do you mean by green houses effect?

Why do stars twinkle?

A seconds pendulum is suspended from the roof of a lift. If the lift is moving up with an acceleration 9.8 m/s2 its time period is