A permanent magnet of length l is dropped from a height h through a coil. What is the ratio of the emf induced in the coil at the moment the bottom of the magnet enters the coil to the emf induced in the coil at the moment the top of the magnet leaves the coil?

Inelastic is the answer your looking for.

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.