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Physics, 22.06.2019 15:20
Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?
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Physics, 22.06.2019 18:50
8.29 two streams containing pyridine and acetic acid at 25Β°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 25Β°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 (Ξ΄mixh) is given below.
Answers: 3
Physics, 23.06.2019 00:30
Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging
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un movil recorre una circunferencia de 4 mts de diametro con movimiento uniforme dando 30 vueltas po...
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