The resistance 2 Ω, 4 Ω and 8 Ω are connected in series. Their equivalent
resistance is
a) 10 Ω
b) 8/7 Ω
c) 7.5 Ω
d) 14 Ω

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

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.