Why do you think the speed of sound is higher
in solids, than liquids and gases?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

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?