Doppler shifted hydrogen absorption lines are seen in the spectrum of a star. The hydrogen line at 656.28 nm is seen to be shifted to 656.08 nm. Is the star moving towards or away from us, or can we not tell?

What mass of water forms when 2.75 x 10-4 mol NaOH reacts completely

Which compound will form from the bonding of CA and N ca3N2, Ca2N3, Ca2N2, caN

why do you think the Framers give Congress a voice in most foreign policy decisions when they wrote the Constitution?

1. Salts consist of atomic particles that have an (blank) charge. fill in the blank 2. The metallic atoms have a positive charge, while the nonmetallic atoms have a (blank) charge.

Which type of force will an object move towards? O weakest O balanced O strongest O net

Aluminum oxide, Al2O3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. Calculate the number of moles in 47.51 g of Al2O3.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller