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:
D. sides
Explanation:
Space cushion includes sides of your vehicle.
Answer: (D) Select and install an App Exchange product to meet the contract generation needs.
Explanation:
The App exchange is the type of salesforce market place in the cloud platform and it included various types of cloud application and the services. We can select and then install the app exchange different types of product and services to meets the given generation needs.
The app exchange service is mainly used in the universal container that mainly needs for generating the document in the system. The user can able to install and access this type of app salesforce easily.
Therefore, Option (D) is correct.
The answer is B. It matters which way you park your car . Your car should also be parallel to the carb but with the wheels inward to the right