#6th science

What is the difference between mass and weight, and how do they change when an object is taken from Earth to the Moon?

Mass (m) is the quantity of matter contained in a body. Weight is the normal force (N) exerted by the surface on the body to balance against gravitational pull on the object. In the case of spring scale, the tension in the spring balances the gravitational pull on the object. When a man is standing on the surface of the earth or floor, the surface exerts a normal force on the body which is…

If you know about Mass & its SI unit?

Mass Mass is the quantity of matter contained in a body. The SI unit of mass is kilogram (kg). One kilogram is the mass of a particular international prototype cylinder made of platinum-iridium alloy, kept at the International Bureau of Weights and Measures at Sevres, France. The units gram (g) and milligram (mg) are the submultiples of ten (1/10) of the unit kg. Similarly quintal and metric…

Length is the extent of something between two points. The SI unit of length is metre. Read more.....

Length Length is the extent of something between two points. The SI unit of length is metre. One metre is the distance travelled by light through vacuum in 1/29,97,92,458 second. In order to measure very large distance (distance of astronomical objects) we use the following units. Astronomical unit Light year Parsec Astronomical unit (AU): It is the mean distance of the centre of the Sun…