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Start learning 50% faster. Sign in nowUltrasound is a cyclic sound pressure wave with a frequency greater than the upper limit of the human hearing range. Ultrasound is thus not separated from "normal" (audible) sound based on differences in physical properties, only the fact that humans cannot hear it. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy, young adults. Ultrasound devices operate with frequencies from 20 kHz up to several gigahertz.
Which of the following fruit is not suitable for jam making?
Short supply of water to meet the demand for crop duration is called
Which of the following entities is responsible for implementing the Pradhan Mantri Kisan Maan Dhan Yojana?
The reddish colour of Red soils develops due to ________
First line demonstration was launched by
Which scheme provides end-to-end support for organic farming in India?
Monocropping depletes quality of soil whereas Rotation of crop is essential for
Rotenone is an odorless, colorless, crystalline isoflavone used as a
Number of land capability class as per Soil Survey of India is:
Active soil forming factors would include:
