When the temperature of the air is 25°c, the velocity of a sound wave traveling through the air is approximately
a. 347 m/s.
b. 332 m/s.
c. 357 m/s.
d. 320 m/s.

Why is there friction between objects

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Sound is a disturbance that travels through a medium as a