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:
months_info = ['January', 'February','March','April', 'May','June', 'July','August', 'September', 'October', 'November', 'December']
date = input('Enter a date using the mm/dd/yyyy format ')
m, d, y = date.split('/')
m = int(m) - 1
name_of_month = months_info[m]
print('{} {}, {}'.format(name_of_month, d, y))
Explanation:
- Create a list of all months and store them in the months_info variable.
- Get the date as an input from user and then split the date.
- Finally display the date by following the specific layout using the built-in format method.
You can not communicate directly between Angular and MySQL. You'll need to build a back-end Web service that calls MySql using php or node. Angular can communicate with this back-end Web service via http.
Answer:
c. your friend can hash all possible options and discover your secret.
Explanation:
SHA-256 is a set of hash functions that was designed by the NSA. SHA-2 is considered an upgrade on the set that was its predecessor, SHA-1. A hash is a mathematical function that condenses data in a process of one-way encryption. SHA-256 creates hash algoritms that are considered irreversible and unique. However, one of the properties of hashing algorithms is determinism, which means that any computer in the world would be able to compute a particular hash and get the same answer.
