Answer:
primary succession is something that was t there before like a forest it once wasn’t there
Explanation:
F = ma
F/m = a
Acceleration, a = F/m = Force / Mass
a) Mass
Answer
D.Diffraction
Explanation
Diffraction is a property that is experienced by waves when they come across a barrier when they are in motion.
The ways tends to curve behind the barrier. This is called diffraction of waves.
Now, sound is a wave and it also experience diffraction. . So the brother will be able to hear the sound due to diffraction
Answer:
Option 2.
Amplify; Amplify
Explanation:
Amplification of sound simply means increasing the loudness of the sound by modifying its electro-acoustic signals. To make very high and very low frequencies of sound audible by the human ear, the sounds need to be amplified by the sound system amplifier.
Sound systems modify high frequencies by amplifying them, and also, they also modify low frequencies by amplifying them. This changes their wave form and brings them into the hearing range of humans.