Force and Laws of Motion — Science STD 9 — Question

What type of waves are generated by SONAR device fixed to a fishing ship?

1. Water waves.
2. Radio waves.
3. Sound waves.
4. Infrared waves.

Arrange the following according to correct Dalton's symbols. Hydrogen Carbon Oxygen Sulphur:

In circular motion, the:

Nasal and genital tracts are lined by:

1. Simple columnar.
2. Stratified columnar epithelium.
3. Pseudostratified epithelium.
4. Stratified cuboidal epithelium.

Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros?

In liquids, there is ____________ and ____________ between particles:

A freely falling object travels 4.9m in 1st second, 14.7m in 2nd second, 24.5m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of:

1. Uniform motion.
2. Uniform acceleration.
3. No acceleration.
4. Uniform velocity.

Which of the following configuration is most likely to form an anion:

A 20kg gun fires a bullet of mass 20g with a city of 400m/ s. The action on the shoulder of the person per second by the gun is:

The ability of nitrogen fixation is found in:

1. Monerans only.
2. Both monerans and protistans.
3. Protistans only.
4. Fungi only.