Sound — Science STD 9 — Question

Buoyant force experienced by a solid is _____ the weight of the fluid displaced by it:

A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is:

1. krypton.
2. kerosene.
3. Carbon steel.
4. Carbon dioxide.

Which of the following frequencies of sound elephants produce?

An electric motor raises a load of 0.2kg, at a constant speed, through a vertical distance of 3.0m in 2s. If the acceleration power stations and thermal power stations, alternators produce electricity.

1. 0.3
2. 1.2
3. 3.0
4. 6.0

The universal law of gravitation gives the gravitational force between

Which one of the following tissue gives mechanical support to young dicotyledonous stem?

The speeds of sound in four different media are given below. Which of the following is the most likely speed in m/s with which the two under water whales in a sea talk to each other when separated by a large distance?

Which of the following statement is true about mole:

Common cold is a:

1. Acute disease.
2. Chronic disease.
3. Congenital disease.
4. Genetic disorder.

Which of the following is not a postulate of Dalton's atomic theory?