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

Which cell organelle is called the 'Suicidal bag of the cell':

Which of the following parameters determines the loudness of sound?

Canal syste system is present in phylum:

1. Cnidaria.
2. Echinodermata.
3. Porifera.
4. Protozoa.

Which of the following is not a property of particles of matter:

Moon is revolving in a circular orbit with a uniform velocity V0​. If the gravitational force suddenly disappears, the moon will

Water molecules move from their ______ concentration to their ______ concentration during osmosis:

Cereals largely fulfils which of the following energy requirement?

Goldstein’s experiments which involved passing high voltage electricity through gases at very low pressure resulted in the discovery of:

1. Electron.
2. Proton.
3. Nucleus.
4. Neutron.

The acceleration produced by a force of 5N acting on a mass of 20kg in m/s² is:

1. 4
2. 100
3. 0.25
4. 2.5

A man carries a heavy box on his head on a horizontal plane from one place to another. In this case, he does: