Gravitation — Science STD 9 — Question

Chromosomes are made up of:

The value of gravitational constant depends upon: 

The contraction of muscle tissue is carried out by the action of:

Direction of motion of a body is given by:

An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4s after it was sent. If the speed of sound in water is 1500m/s, how deep is the shoal?

1. 150m
2. 300m
3. 600m
4. 7500m

The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?

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

When heated, molecules absorb ____ and their capacity to do ____ increases:

Identify the action involved in opening or shutting a door:

Energy is: