Answer: see attach file
Explanation: In order to solve this problem we have used the Gaussian law in the different regions. Details are included in the attach.
The sound is perceived as louder if the amplifier increases, and softer if the amplitude decreases.
Answer:
F = 296.7N
Explanation:
The x and y component of the position vector are given by:


At t = 2s:

Plugging in:

The resulting force F is:

Nephrons are the names of the tubes that collect the waste and transport to kidney
' D ' is the only correct statement on the list.
Electromagnetic waves are capable of traveling through
many substances, and they're also capable of traveling
through vacuum. Mechanical waves can't travel in vacuum.