Gravitation — Science STD 9 — Question

The gravitational force of attraction between two objects is x. Keeping the masses of the objects unchanged, if the distance between the objects is halved, then the magnitude of gravitational force between them will become:

Tyndall effect can be observed in a colloidal solution. Consider light scattering in the following:

1. When sunlight passes through the canopy of a dense forest.
2. When normal light passes through copper sulphate solution.
3. When normal light passes through milk.
4. When a fine beam of light enters a room through a small hole.

Tyndall effect is observed in:

Which one of the following is the fastest growing carp?

The atom as a whole is electrically neutral", is a statement proposed by which atomic model:

The waves which propagate in metals are:

A mixture of milk and ground oil can be separated by:

1. Sublimation.
2. Evaporation.
3. Separating funnel.
4. Filtration.

Chlorophyll is present in:

Which of the following situations are not possible?

A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car:

Different isotopes are matched with their uses as

1. Co - 60 - To treat cancer.
2. U - 238-To produce electricity.
3. I - 131 - To treat goitre.
4. Na-24-In agricultural research.

Options: