if a projectile is launched with speed 50m/s at angle 30 degree to the horizontal what is the initial vertical velocity

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?

The dot diagram represents the motion of the motorcycle as it moves from left to right

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)