Jessie creates a model of two waves that have the same amplitude as shown.
which description best compares the two waves?

wave b has less energy because it has a lower frequency and a longer wavelength.

wave a has less energy because it has a higher frequency and a shorter wavelength.

wave b has greater energy because it has a higher frequency and a shorter wavelength.

wave a has greater energy because it has a lower frequency and a longer wavelength.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.