The orbits of electrons in an atom are titled K, L, M, N... why not a, b, c, d... ?
Airplanes require long runways for takeoff and landing. Then how do planes takeoff from shorter runways of aircraft carriers?
How does scientists differentiate between galaxies? Is there any natural differentiation?
Why are planets spherical in shape?
Why do tears come when we peel an onion?
Have astronauts come across disease causing organism while in space?
Tides occur only in seas and oceans and not in rivers, canals and lakes. Why is it so?
More radio stations are available at night time. Why?
Why does magnetic needle point only in the north-south direction?
The Earth rotates around its axis. Suppose an airplane after taking off stands still in the sky. Can it land st the same place after 24 hours?
In Norway, the Sun is seen throughout the day for several weeks. How does this happen?
The constellation Ursa Major (Saptarishi) revolves clockwise around the Pole star. What will be the revolving speed of these stars?
A friend told me that if the rope pulling up a lift breaks the lift will not experience a free fall. If this is correct please tell me why.
When a tyre bursts, the air coming out is colder than surrounding air. Why?
Why don't clouds fall to the ground as rocks do?