What is the Luminosity of a Cepheid Variable star with a period of 30 days?

Declaration of independence basically declares war with britain while bill of rights is document with the rights of the people written down.

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. this makes plastics which are important also to people but sometimes it lead to harmful environmental effects such as global warming if these plastics are burned.

The ground state electron configuration of a phosphorous atom has  three unpaired electrons. they're in the 3p sublevel. the electron configuration is: , for a total of  15 electrons.