- Cepheid variable star has a period of 5 days. What is its luminosity, in solar units?

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Algebra math question! Help please! :)? Julie ran 5 miles during 7 days, an equal amount each day. How far did she run each day? Can someone please solve 600 + 20 x / x +60? Tolong dong yang pinter mate
No 25 ajaa A laser pulse with wavelength 545 nm contains 4.40 mJ of energy. How many photons are in the laser pulse?

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