An aeroplane flying 490m above the ground level at 100m/s releases a block how far on the ground will it strike

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

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a sonic boom is a loud boom that breaks the sound barrier

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answer(20) psi;