Gravitation — Science STD 9 — Question

A fruit hanging from the top branch of a tree possesses:

The law of gravitation gives the gravitational force between:

1. The earth and a point mass only.
2. The earth and the sun only.
3. Any two bodies having some mass.
4. Any two charged bodies only.

When an object falls freely towards the earth, then its total energy:

1. Increases.
2. Decreases.
3. Remains constant.
4. First increases and then decreases.

Protein storing plastid is:

Below the skin, the fat is in the form of ____________?

In order to prove the law of conservation of energy in a freely falling object, Nakul followed the steps:
A: Found P.E. at the height ‘h’
B: Used v² = u² + 2as and (h - s) to find total energy after a fall of 's' metre.
C: Found K.E. just at the time of landing.
The sequence of steps are:

What will cause an object to move?

The nucleus of an atom contains

Which of the following are homogeneous in nature?

1. Ice
2. Wood
3. Soil
4. Air

1. (i) and (iii)
2. (ii) and (iii)
3. (i) and (iv)
4. (iii) and (iv)

Robert Hooke actually observed ________ of cells.