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:
Following are the statement in C++ Language is given below
total=0; // variable declaration
cin >> amount; // Read the input
while(amount >=0) //iterating the loop
{
if(amount>0) // checking condition
total=total+amount; // perform operation
}
Explanation:
Following is the description of the statement
- Declared a variable "total" and initialized with them 0 to them.
- Read the input in the "amount" variable by using cin.
- iterating the loop when the amount is greater then 0.
- Checking the condition if(amount>0) then adding the total variable and amount and storing them into the total variable.
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