Why do sound waves move faster through the ground than through the air?
a. particles of matter are packed more loosely in the ground than in the air.
b. particles of matter are packed more tightly in the ground than in the air.
c. air doesn’t contain any particles of matter to transmit sound waves.
d. the elevation of the ground is lower than the elevation of the air space.

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Find the mass by adding the numbers from the three sliders