Gravitation — Science STD 9 — Question

A balloon is rising vertically up at constant speed 10 m/ s.A stone is dropped from it when the balloon is at a height of 40m. otal distance covered by the stone before reaching the ground is (take g=10 m/ s2)

Pitch of the wave is measured in terms of:

Which of the following can be called a suspension?

1. Milk.
2. Milk of magnesia.
3. Salt solution.
4. Vinegar.

The shorter duration crops help the farmer :

Mass number of all elements represents number of ______________?

Work is expressed by the formula as:

Growing different crops in the same field in a pre planned succession is:

Hemophilia is a:

1. Acute disease.
2. Deficiency disease.
3. Chronic disease.
4. Congenital disease.

Plasma content of blood is:

1. 35%
2. 55%
3. 65%
4. 80%

Evaporation of a liquid _____________?