15-12-2022
Chemistry

Answered

If a star has an absolute magnitude of 10 and a temperature of 20,000 K, under which spectral class would the star be classified?

A

O

B

F

If a star has an absolute magnitude of 10 and a temperature of 20000 K under which spectral class would the star be classified A O B F class=

Answer :

Other Questions

How much ZNCl2 do you need to weigh out to make 250 ml of a 50 mM solution? Group of answer choices 17 g 126 mg 1.7 g 1.26 g 17 mg

Which measurement of length is the smallest? O 9 x 10-6 m O 7 x 10-5 m 07 7 x 10¹ m O 9 x 10² m

Please Help! What is the mass in 3.00 x 10 23 units of calcium chloride, CaCl₂? * O 1.05 g O 79.5 g O 54.8 g O100 g

Please Help! How many atoms of sulfur are in a 2.500 mole sample of pure sulfur? * O 1.505 x 10 24 O 5.69 x 10-24 O 110. O 1.20 x 1024

Please Help! When the following equation is balanced, what is the coefficient in front of the HCI? HCI + CaCOS → CaCl₂ + CO₂ + H₂O o 1 o 2 o 4 o 3

The picture shows a bicyclist increasing speed while riding down a hill during a bicycle race. Which statement BEST describes the potential and kinetic energy o

The effective nuclear charge, Zeff, experienced by valence electrons in an atom can be estimated from the equation: Zeff = the number of protons – the number of

Answer the four questions below regarding a particular type of alkaline battery in which the following half-reactions are used () +2015 (ap) F-0150 2 MnO, (1) +

Please help 100 points Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element. Hydrogen Helium Lit

4. A main group element has 81 protons and an estimated nuclear charge of +3. Therefor, the element has ____ electrons and can be on in Group ____ of the Period