Delhi Sultanate – The Slave Dynasty (Mamluks)
Mamluks were the earliest rulers of the Delhi Sultanate. They are also…
Study Notes
Easy-to-read notes for quick revision.
The Arab and turkish Invasion in India
 Arabs captured Sindh in 712 AD.The Arab conquest of Sindh was led…
Rashtrakutas – Administration, religion, literature, art, and decline
Inscriptions and other literary records indicate the Rashtrakutas selected the crown prince…
Rashtrakutas – Founder, Rulers, and Expansion
 Rashtrakuta was a royal dynasty ruling large parts of the Indian subcontinent…
Note
Structure of Human Ear and Hearing Aid
A hearing aid is a battery-operated, an electronic device that receives sound…
SONAR : “Sound Navigation and Ranging”
“Sonar” can be defined as “ Sound Navigation and Ranging” This device…
Applications of Ultrasound (ultrasonic sound waves)
The high frequency waves are known as ultrasound. ultrasonography is also done…
Sound: Reverberation, and Range of Hearing
Reverberation is the persistence of a sound after a sound is produced.…
Speed of sound in different media
  The speed of the sound in a medium is affected by the…
Note
Sound waves : Different Characteristics – Frequency, Amplitude, Pitch, Timber
Compression (C) – These are the regions where particles are crowded together…
Sound: Production and propagation
The basic way for the production of Sound is “vibration”. When an…
Molecular Mass and Mole Concept
 The summation of the atomic masses of all the atoms in a…