The look-back time is numerically equal to the distance to a galaxy in light-years
a. True
b. False
Indicate whether the statement is true or false
True
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Propanol (C3H8O) is boiled in a container at 101 kPa and where the surface temperature is 120ºC. Its saturation temperature is 97.4º C and its heat of fusion is 697 kJ/kg. Estimate the heat transfer per unit area.
What will be an ideal response?
The Sun's observed spectrum is
A) a continuum with no lines, as shown by the rainbow. B) only emission lines on a black background. C) only absorption lines on a black background. D) a continuum with absorption lines. E) a continuum with emission lines.
When the applied magnetic field on a ferromagnetic material is reduced to 0 after saturation, the intensity of magnetization is equal to
(a) 0. (b) The saturation magnetization. (c) The remanent magnetization. (d) The coercive field.
The big bang created
A) space and time. B) matter and energy. C) Both of the above. D) None of the above.