When describing image formation for flat, shiny surfaces, what is an important rule to remember about light rays

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

The mantle is made up of which structural zones?

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?