Is Matter Around Us Pure ? — Science STD 9 — Question

If the distance between two masses be doubled, then the force between will become:

If the tip of the sugarcane plant is removed from the field, even then it keeps on growing in length. It is due to the presence of:

Which of the following poultry bird lays maximum number of eggs?

1. ILS-82
2. B-77
3. HH-260
4. IBL-80

Which of the following statements is not true about an atom?

Evaporation that occurs directly from the solid phase below the melting point is called as:

Which of the following statement best describe frequency?

1. The maximum disturbance caused by a wave.
2. The number of complete vibrations per second.
3. The distance between one crest of a wave and the next one.
4. The distance travelled by a wave per second.

Brush-bordered epithelium is found in:

Law of conservation of mass was put forward by:

The device which converts mechanical energy into energy which runs our microwave oven is:

1. Electric motor.
2. Alternator.
3. Turbine.
4. Electric heater.

Select the most appropriate option.Eukaryotic cells have a dense double membrane-bound structure inside, called: