Aband director instructs students to play a pitch louder. how will the sound wave change when the band plays the same pitch louder? a) the speed of the sound wave will increase. b) the frequency of the sound wave will increase. c) the wavelength of the sound wave will increase. d) the amplitude of the sound wave will increase.

Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction

What does every magnet possess? a. iron metal b.strong magnetic field c.repulsion d.north and south poles

Derive the lens makers formula for convex les?