SSLC (English Medium) कक्षा ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

What is the minimum possible temperature? Is there also a maximum possible temperature?

What do you mean by thermal equilibrium?

Why are burns caused by steam more painful than those caused by boiling water at the same temperature?

Define absolute zero.

Compare heat capacity and specific heat capacity.

Explain the following effects of heat.

Change in temperature

What will be the final temperature if 1,68,000 J of heat is absorbed by 2 kg of water at 30°C?

When temperature increases the speed of sound ______.

The speed of sound in a gaseous medium depends on ______.

The propagating disturbance that travels in a medium is called a ______.

Sound travels faster in ______ and slower in ______.

The velocity of sound by a tuning fork frequency of 480 Hz is 340 ms Its wavelength is ______.

Assertion: The speed of sound in air is less than the speed of sound in solid.
Reason: If we increase the temperature of medium, the speed of sound increases in any medium.

The speed of sound in a gaseous medium depends on the nature of the gas.

On which factors does the speed of sound in the gaseous medium depend?

On which factors does the speed of sound in the solid medium depend?

Numerical problems:

Two persons are at opposite ends of a steel rod. One strikes the end of the rod with a stone. Find the ratio of time taken by the sound wave in the air and in steel to reach the second person. (Sound of speed in steel = 5960 ms^-1, Sound of speed in air = 344 ms^-1).

Numerical problems:

A Sound wave travels at a speed of 344 ms^-1. If the wavelength is 1.5 cm, what is the frequency of the Wave? Will it be audible?

What is microgravity?

The orbital velocity of the satellite depends on its ______.