A material that allows heat/electricity to transfer is called a conductor.
Answer is: <span>Sound waves travel faster in more dense material, and the more dense the material the louder the sound is.
</span>Sound travels approximately fifteen times faster through the metal railway tracks than through air. <span>The </span>speed of sound is faster in solid materials and slower in liquids or gases. The denser is material, t<span>he closer are the molecules to each other and the less time it takes to molecules to pass the sound to each other and sound is faster.</span>
The +17 is referring to the number of protons within the atom. The minus signs with circles around them represent electrons orbiting the nucleus.
KE = 1/2 * m * v^2
KE = 1/2 * 130 * 23^2
KE = 34385J