Which of the following provides an example of sound waves being reflected? a
b
A noise that produces an echo when it bounces off a distant wall.
The sound of a distant train getting louder as it approaches you.
Hearing music being played by a neighbor's stereo through a wall.
Water in a glass vibrating because of the sound of thunder.
C С
d

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

conduction, convection, radiation

+15-35=-20

going in opposite directions