In a wave, what is the distance from crest to crest or from trough to trough amplitude crest wavelength frequency

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

The radius of an atom is closest in size to a

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.