Improvement in food resources
How do plants get nutrients?
Improvement in food resources
What are macro-nutrients and
why are they called macro-nutrients?
Improvement in food resources
What do we get from cereals,
pulses, fruits and vegetables?
Improvement in food resources
What are the desirable agronomic
characteristics for crop
improvements?
Improvement in food resources
How do biotic and abiotic factors
affect crop production?
Sound
Explain how defects in a metal block can be detected using ultrasound.
Sound
How is ultrasound used for cleaning?
Sound
What is loudness of sound? What factors does it depend on?
Sound
What is reverberation? How can it be reduced?
Sound
A sound wave travels at a speed of 339 m s–1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
