True, RR Lyrae stars pulsate, but with shorter periods and lower luminosities than Cepheids.
The pulsation periods of the fundamental-mode RR Lyrae stars range from about 0.3 to 1.0 days (Population II pulsators with longer periods are categorized as type II Cepheids), but the vast majority of them have generations longer than 0.45 days.
<h3>Why do RR Lyrae stars pulsate?</h3>
RR Lyrae stars pulse like Cepheid variables, but the nature and histories of these stars is thought to be rather different. Like all variables on the Cepheid fluctuation strip, pulsations are caused by the κ-mechanism, when the ambiguity of ionised helium varies with its temperature.
To learn more about RR Lyrae, refer
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The len ( ) function will run with each iteration, printing the element number each time.
Answer:
Keep Source Formatting & Embed Workbook
Explanation:
Source formatting is used to apply the formatting from source document while copying and pasting.
Source is the place where the data is already placed and we want to move it make a copy of it on some other document. So if we don't want to change the formatting of source document, we choose source formatting from the options while pasting.
Embed is used to whenever we don't want to link the formatting with source document.
So,
You use the Paste Options button labeled <u><em>Keep Source Formatting & Embed Workbook</em></u><em> </em>if you want the pasted chart not to be linked to the source document and you want the pasted chart to keep the formatting from the source document.
1.Extended border node (EBN)
2.Central directory server (CDS)
3.Branch extender (BEX or BrEx or BrNN)
Answer:
interface GUIComponent{
public void open();
public boolean close();
public void resize(int width, int height);
public void move(int x, int y);
}
Explanation:
