Compare the sounds produce by wave a and wave b. the human ear would hear

a) wave a as a louder sound than wave b.

b) wave a as a higher pitched sound than wave b.

c) wave a and b with the same pitch, but wave a as louder.

d) wave b as a louder and higher pitched sound than wave a.

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Blank liquids and gases exert a buoyant force on objects placed in them

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.