So you not only know<span> how fast it is going, but where it is going.</span>
The elements which have similar behavior are Barium, strontium and beryllium.
The answer is B because 13 m/s is a greater acceleration than 10 m/s in the same amount of time.
Spectroscopy — the use of light from a distant object to work out the object is made of — could be the single-most powerful tool astronomers use, says Professor Fred Watson from the Australian Astronomical Observatory. ... "It lets you see the chemicals being absorbed or emitted by the light source.
