If a spring balance is used to weigh a body, will the weight of the body be the same in vacuum and air ? Explain why

Explain the body plan in animals.

A spring balance is graduated on sea level. If a body is weighed with this balance at consecutively increasing heights from earth's surface, the weight indicated by the balance

Will the mass and weight of an object on the earth be same as their values on Mars? Why?

A satellite is going in a circular orbit of radius 4 xx 10^5 km around the earth has a certain speed. (b) What will be the ratio of the weight of a body on the surface of Mars to tyhe weight of the same body on the surface of the earth? The masses of earth and Mars are in the ratio 10:1 and their radii are in the ratio 2:1

What is the difference between mass and weight of an object ? Will the mass and weight of an object on the earth be the same as their values on Mars ? Why ?

Explain briefly the animal body plan with the help of suitable example.

A spring balance has a scale that reads from 0 to 50 kg. The length of the scale is 20 cm. A body suspended from the balance , when displaced and released, oscillates with a period of 0.6 s. What is the weight of the body ?

Is it possible to weigh one molecule using a weights of different substances?