Why does a glass baking pan bake the brownies in a shorter time than the metal
baking pan?

A. Both pans "get hot" and transfer heat by
conduction into the brownies, but the glass
pan also allows heat waves to pass through it.

B. Because heat can radiate through the glass
baking pan but not the metal one.
Both A and B are correct

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.