On the H-R diagram below, indicate the location of the white dwarf stars
An elongated region should be indicated that stretches from a luminosity of about 10?2 and spectral type B to luminosity of about 10?4 and spectral type G.
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What is meant by system properties?
What will be an ideal response?
It is the day of the Summer Solstice. You notice that for you the Sun never sets. Who are you?
a) a macaw in the South American rain forest b) a penguin below the antarctic circle c) a polar bear above the arctic circle
What do "forbidden" lines reveal about interstellar space?
A) The density or pressure of this gas is much lower than can be produced in a laboratory. B) The laws of physics are not the same in space as they are on Earth. C) There are unknown elements in space that do not correspond to elements found on Earth. D) There are molecules found in meteorites and interstellar dust that are not found on Earth. E) All of the above are true.
A bimetallic strip is formed from two materials that have different
a. coefficients of linear expansion b. heat capacities c. calories d. phase transitions e. relative humidities