How long a star can remain on the main sequence depends upon its __________
Fill in the blank(s) with correct word
mass
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In the symbol for the Hubble type of a galaxy, SBc, the "B" denotes
A. the presence of a bar B. a large bulge component C. loosely wound spiral arms D. the presence of a ring E. tightly wound spiral arms
In an x-ray machine, electrons are accelerated and then fired so that they are incident on a metal target. Which part of the process produces the characteristic x-ray spectra?
a. The incident electron loses energy. b. The incident electron knocks an electron out of one of the metal atoms. c. A vacancy in an energy level in a metal atom is filled. d. The incident electron emits an x-ray.
Your vocal cords are used to produce all the sounds you make while speaking
Indicate whether the statement is true or false
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?