DThe angular displacement of a gear is 0=(2ť - 9t+4) radians where tis measured in seconds. (a) Calculate its angular velocity and angular acceleration att=25 (b) Is the angular acceleration constant?​

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.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole