Using a graph of remaining nuclei over time for two isotopes: Half-life:
Use the if:
This article explores the significance of the 1984 exam, breaks down the typical question structures found in that era, and analyzes the physics principles that made these problems a rite of passage for thousands of science students. 1984 ap physics b free response
This problem punished students who forgot that momentum is not conserved if external forces (like gravity or friction) act during the collision. But during the instantaneous collision, momentum is conserved. Using a graph of remaining nuclei over time
Minimum thickness for destructive interference (Reflected minimum): Occurs when if there is one phase change, or if there are two or zero. momentum is conserved.
Separating motion into independent x- and y-components; understanding that time of flight is determined solely by vertical motion.