The emission line used for zinc determinations in atomic emission spectroscopy is 214 nm. if there are 9.00×1010 atoms of zinc emitting light in the instrument flame per second, what energy (in joules) must the flame supply during this time to achieve this level of emission?

Sound is a disturbance that travels through a medium as a

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

70 give a real life example showing how sensory neurons work with the motor neurons