With reference to Sound waves consider the following statements:
(i) Human ear is capable of detecting sound waves ranging between approximately 20 Hz to 20 000 Hz.
(ii) Sound waves in air are Transverse waves, where displacement of the medium is parallel to the propagation of the wave.
(iii)Sound generally travels faster in gases and liquids than in Solid.
Which of the statements given above is/are correct?
The Department of Telecommunications (DoT) has revised the broadband speed in consonance of the National Telecom Policy 2012 and Trai recommendations. The earlier minimum broadband speed of 256kbps was as per the Broadband Policy 2004.What is the new minimum broadband speed?
The disease diphtheria affects
The cell that lacks a nucleus is
The blue colour of the clear sky is due to
The animal which uses sounds as its 'eyes' is
Thalassaemia is a hereditary disease affecting
Stainless steel is an example of
Why is it difficult to see through fog?
Which one the following is the most effective carrier for communications?
Which one of the following types of waves are used in a night vision apparatus?
Which one of the following statement is NOT correct?
Which one of the following planets has largest number of natural satellites or moons?
Which one of the following is used as an explosive?
Which one of the following is not a radioactive element?
Which one of the following is correct?A concrete wall generally,
Which one of the following is considered as the easily digestible source of protein?
Which acid is produced when milk gets sour?
Which of the following is a water -borne diseases?
When an ant bites a person, which irritating chemical it (ant) injects into his (person) body?
What would be the best choice for window material to keep the outside heat away?
Water boils at a lower temperature on the hills because
Washing soda is the common name for
The most abundant organic molecule on the surface of the Earth is
The persons working in textile factories such as carpet weavers are exposed to which of the following occupational disease?
Because of the fine clothing fumes and tiny particles of thread and the dye used in textile is harmful.