Tudent a runs down the hallway of the school at a speed of vo=5.00m/s, carrying a ringing 1024.00-hz tuning fork toward a concrete wall. the speed of sound is v=343.00m/s. student b stands at rest at the wall. (a) what is the frequency heard by student b? (b) what is the beat frequency heard by student a?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

Which accurately compares concave and convex lenses?