As a result of friction, the angular speed of a wheel c hanges with time according to d θ d t = ω0 e −σ t , where ω0 and σ are constants. The angular speed changes from an initial angular speed of 4.43 rad/s to 3.63 rad/s in 3.92 s. Determine the magnitude of the angular acceleration after 3.41 s. Answer in units of rad/s 2 .

Which transformation confirms that rectangle abcd and rectangle efgh are similar? a) rectangle abcd is rotated 90° clockwise about the origin and then dilated by a scale factor of 2 with the origin as the center of dilation. b) rectangle abcd is rotated 90° clockwise about the origin and then dilated by a scale factor of 1 2 with the origin as the center of dilation. c) rectangle abcd is rotated 90° counterclockwise about the origin and then dilated by a scale factor of 2 with the origin as the center of dilation. d) rectangle abcd is rotated 90° counterclockwise about the origin and then dilated by a scale factor of 1 2 with the origin as the center of dilation.