The formula for the ionic compound sodium nitride is ______________
Fill in the blank(s) with correct word
Na3N
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An M star is hotter than an O star
a. True b. False Indicate whether the statement is true or false
During various stages of evolution, low mass stars (like the Sun) differ significantly from high mass stars. How do they differ in terms of observational properties while Main Sequence stars?
What will be an ideal response?
The strong force is mediated by
a. the gluon. b. the W– boson. c. the W+ boson. d. All of these choices.
A refrigerator transfers heat from a colder body to a hotter body while energy is used to operate the device. This is
A. impossible unless the refrigerator uses a Carnot cycle. B. allowed only if the internal energy of the refrigerator increases. C. consistent with Clausius's statement of the second law. D. possible if entropy of the contents of the refrigerator increases.