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Longitudinal waves cannot travel through vacuum because such wave requires a medium such as solid liquid or air to travel through. They cannot travel through vacuum or in space. Longitudinal waves, also known as "l- waves", are waves that have the same direction of vibration as their direction of travel, which means that the movement of the medium is in the same direction as, or the opposite direction to, the motion of the wave.
Which of the following statements about extent of infection and perpetuation of pathogen are correct?
(A) Disease which is confined to a particul...
Which of the following soil type have low water retention capacity?
The water soluble P (as % P₂ O₅ ) in ammonium phosphate (DAP) is
In a normally distributed population, number of observation faling within the range Mean ± S.D. is approximately __________%
Which of the following diseases is associated with invention of Bordeaux mixture?
National Agriculture Market (eNAM) is a pan-India electronic trading portal which networks the existing APMC mandis to create a unified national market ...
In a pea flower five petals are arranged in a specialised manner with one posterior, two lateral and two anterior. These are named as and respectively
Which one the following Country has largest area under drip irrigation in the world?
What is the percentage of Nitrogen (N) in DAP?
The core component that allows an expert system in extension to function like a human expert is: