Skip to main content

Why does the moon change its shape every night ?

As we know that moon does not have it's own light. It reflects the light of sun. So, the shape of the moon depends on the part that is lighted from the sun.Since Earth, sound and the moon are connected. It's 265.25 days for earth to rotate the sun and 27.32 days for moon to orbit earth.But we only see half of the moon(one face)which is always illuminated by the sun.The proportion of the illuminated part visible to us varies from 0% (new moon) to 100% (full moon).

Related Questions :-

Labels:

Popular posts from this blog

Why compass needle always points North ?

The Earth has its own magnetic field , it acts like there is huge bar magnet buried inside,but this bar magnet is not on the earth rotational axis it is shifted by some angle.The south of the bar magnet is on the magnetic north and the south polarity is on the magnetic north(image).As opposite polarities attract the magnetic needle (north) is attracted to the south polarity in the magnetic north.That’s why the needle always points north.If you want to know “why earth has magnetic field?”go to letter E.
Read more

Why Roads Are Black in Colour ?

There are reasons for why roads are black in colour that I identified and I want to share with you :- Asphalt concrete is available at a low price. The cost that occurs to made of asphalt roads is also low. During the summer and high temperatures, the black color does not reflect the solar waves that will help us to see the roads clearly. Asphalt concrete absorbs heat but that doesn’t affect visibility in extremely hot conditions. In night times bright colors can be easily seen on black roads. whereas bright colors on white roads cannot easily be identified. We can easily say that white lines can be easily identified on black roads whereas white line road markings cannot be identified easily on the white roads. In addition, any irregularity on the road, with the exception of the black color, can be simply detected.
Read more

Why do objects of different masses reach ground at same time ?

Before Galileo it was thought that heavy object weighs more.So it must fall down,since it has more weight (greater downward force applied to it). But that was proved wrong when Galileo threw two balls of different masses from Pisa tower.Where the  heavier object get more mass that means it gets more inertia (more resistive to move).Hence,it needs more gravitational force (weight) to accelerate it at the same rate as the light one.
Read more