An airplane is flying through a thundercloud at a height of 2120 m. (A very dangerous thing to do because of updrafts, turbulence, and the possibility of electric discharge.) If there is a charge concentration of 53.7 C at height 4320 m within the cloud and −52.6 C at height 1270 m, what is the magnitude of the electric field E at the aircraft? The Coulomb constant is 8.98755 × 109 N · m 2 /C 2 . Answer in units of V/m.

Uncle grandma

The fertilized egg  begins to develop into a hollow ball of cells called the blastocyst. 

Answermake them get very hot and over time wear them out;

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.