Motion — Science STD 9 — Question

Which statement about atom is incorrect?

Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?

1. Stretched strings.
2. Stretched membranes.
3. Metal plates.
4. Air columns.

In binomial nomenclature consists of two words:

1. First alphabet of generic name.
2. All alphabet of generic word.
3. First alphabet of specific word.
4. All alphabets of specific word.

Cells which lose their nucleus during differentiation are:

If the particle completes one rotation along a circular track having radius 14m in 44 seconds then the value of speed it’s speed is…

Epithelial tissue always has an exposed outer surface and an inner surface anchored to connective tissue by a thin, non-cellular structure called the:

1. Nonstratified layer.
2. Stratified membrane.
3. Basement membrane.
4. Fibroblast.

Two particles A and B of masses 20g and 30g, respectively are at rest at a certain time. Because of forces exerted by them on each other, the particles moving. At a given instant, particle A is found to m towards the East with a velocity of 6cm/s. What is the velocity of particle B at this instant?

The ratio of force and acceleration is:

The slope of displacement-time graph being negative implies

The functional units of Golgi apparatus are: