On increasing the temperature, the speed of sound in air:

Loudness measures the sound energy reaching the ear per second and depends on the amplitude of the sound wave. What is the unit used to measure the loudness of sound?

We can easily distinguish between the sounds of the different singers even without having seen them. This is all due the different quality or timber of their sounds. On what factor does the quality of sound depend?

The bats can fly in the darkness of night without colliding with the other objects by emitting special sounds while flying. Which characteristic of sound is used by the bats to navigate?

Which of the following can produce longitudinal as well as transverse waves under different conditions?

If the speed of a wave is 380 m/s and its frequency is 1900 Hz, then the wavelength of the wave will be:

You must have seen the doctor checking the sounds produced in the chest or heartbeat of a patient using a medical instrument called Stethoscope. On what principle does this Stethoscope work?

You are aware of Polio Eradication Programme in your city. Children are vaccinated because

Many of the people suffer from the problem of acnes and feel annoyed of the ugly skin texture caused due to the acne spots. Can you guess the microorganism causing these acne?

Antibiotics are ineffective against the viral infections. For each type of the viral infection, human body produces its own antiviral protein that is released from the infected and dying host cells. What is this protein called?

Cancer is a disease caused due to the uncontrolled growth of tissues in any part of body. This disease comes under which of the following types?

The main symptoms of the HIV-AIDS infection are due to the fact that patient’s body can no longer fight off many minor infections and hence becomes the reason of the patient’s ultimate death.This happens because:

Tuberculosis is a disease which spreads from one person to another directly or indirectly is diagnosed with the help of a protein extracted from a bacterium called Mycobacterium tuberculosis which also causes the disease. What is the name of this protein?

Cholera is an infectious, fatal disease caused by the bacterium which lives and multiplies in the small intestine. The disease sometimes occurs in epidemic form. Which of the following is not a reason for the spread of the disease?

For the prevention of the dehydration, the patient is advised to take Oral Rehydration Solution (ORS). The main components of ORS solution are:

TAB-vaccine is used to provide immunity against Typhoid for a period of three years.What is the correct abbreviation of TAB?