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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Answer:
0-9
Explanation:
count 0 as 1
len(0,1,2,3,4,5,6,7,8,9)=10
Answer:
Following is the program in the python language
st = 'sAN RaN' #String
print(st.lower()) #display into the lowercase
Output:
san ran
Explanation:
Following are the description of program
- Declared and initialized the string in the "st" variable .
- The lower function in python is used for converting the uppercase string into the lower case string .
- Finally in the print function we used lower function and display the string into the lower case
Answer:
I1 to K2: Use a formula to link the cells. Create a formula in column L that calculates the averages for each matching category in K2:
<h3>hope it's help you </h3><h3>plz mark as brain list </h3>
Answer:
I would say b but if I'm wrong take the point back
