The total kinetic and potential energies
Answer:
Granite
Explanation:
Trust me I learned this 2years ago
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:
27 Joules.
Explanation:
use the formula for kinetic energy:
KE = 1/2mv^2