Without understanding mathematics, it is practically impossible to see its applicability and beauty

i'm not sure which is true or false

Describe the path of a ray that approaches a mirror parallel to the principal axis.

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.

Explain why you think this diagram shows what happened to the carbon in the biodome.