Improvement in Food Resources — Science STD 9 — Question

Which one of the following statements about power stations is not true?

Choose the correct statement of the following:

Haversian canals are present in:

The physical quantity which makes it easier to accelerate a small car than a large car is measured in the unit of:

A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case:

1. Sound will be louder but pitch will not be different.
2. Sound will be louder and the pitch will also be higher.
3. Sound will be luder but pitch will be lower.
4. Both loudness and pitch will remain unaffected.

The idea ‘omins cellula e cellula’ which means that all living cells arise from preecisting cells was given by:

The relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid?

1. P
2. Q
3. R
4. S

Which one of the following is most likely to exhibit Tyndall effect?

Cells were determined to be the basic structural units of plants and animals, in which of the following time period?