Question
Which of the following statements is true about
sound? ÂSolution
Sound is a mechanical wave, so it needs a medium like air, water, or solids.  It cannot travel in vacuum (like in space).  This is why no sound can be heard in outer space.  Reflection of sound is used in SONAR and echo.
The NISAR satellite, set to be launched in March 2025, is a collaborative project between which two countries?Â
Hydrogen was discovered by:
Which extinct species was revived using ancient DNA sequencing and gene editing by Colossal Biosciences?
Sir CV Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?Â
What is the range capability of India’s first long-range hypersonic missile?
Which of the following contributes to acid rain?
Which gas is responsible for the depletion of the ozone layer?
Relevant for Exams:
