28) A 3.00 kg block is attached to a finding spring 75.0 N/m and oscillates on a surface Horizontal without friction. At time t = 6.80 s, the block is released from rest to x= +27.0 cm. (That is, the resort being 27.0 cm long.) Find the mechanical energy of Oscillations. 29) An object is placed on the optical axis 80 cm from a 20.0 cm focal length lens. If the Object size is 5.00 cm, what is 1 A thousand of the image? Give absolute value (Positive) in cm. In your written development, draw characteristic rays and Describe (with justification) the following characteristics of the image: real/virtual, Right/overturned, reduced/enlarged