The layer above the chromosphere is the photosphere
a. True
b. False
Indicate whether the statement is true or false
False
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From Earth, the center of the Milky Way lies in the direction of the constellation Cygnus
Indicate whether the statement is true or false
Current: When a current flows through an ionic liquid such as salty water, the moving charges are
A. only protons. B. only electrons. C. only negative ions. D. only positive ions. E. both positive and negative ions.
In the apparatus shown in figure Q4.1b, the final value displayed by the voltmeter is proportional to 
A. The rate at which electrons emerge from the cathode. B. The average kinetic energy of the ejected electrons. C. The maximum kinetic energy of the ejected electrons. D. Both A and C.
The form of electromagnetic radiation most effectively blocked by a dark nebulae is ________
Fill in the blank(s) with correct word