Motion — Science STD 9 — Question

Water stored in earthen pots become cool in summer because of:

Which of the following is not a type of WBC:

The time taken by ___ oscillation  to complete is called time period:

An atom with 3 protons and 4 neutrons will have a valency of:

Find out the correct sentence about manure.

1. Manure contains large quantities of organic matter and small quantities of nutrients.
2. It increases the water holding capacity of sandy soil.
3. It helps in draining out of excess of water from clayey soil.
4. Its excessive use pollutes environment because it is made of animal excretory waste.

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

When a force retards the motion of a body, the work done is:

Four elements W, X, Y and Z contain 8, 11, 9 and 17 protons per atom respectively. The element which cannot form an anion is most likely to be:

1. W
2. X
3. Y
4. Z

Which of the following would not be considered part of a cell's cytoplasm:

Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be: