Distance s=347 meters
time t=134 sec.
speed =s/t=347/134=2.5896 m/s nearly
Well research shows that it's not technically a chemical change. you need to find out whether you are looking for silica or to use glass changes on a molecular level when heated or if it's melted into another form (physical change). It appears that to make glass you simply melt silica into the resulting product, which is glass. there is not a chemical change or molecular change. Therefore, <u>making glass<em /></u> from sand is a <u>physical</u>, not a chemical change.
C. Ar or Argon
<span>It is the most commonly used gas between thermal window panes. Argon has 34% lower thermal conductivity than air and is therefore more suitable to be used instead of air. It is also inert and does not react or causes any form of harm.</span>
Answer:
0
Explanation:
they cancel each other out (ex: 1 positive and 1 negative cancels, making it neutral or a charge of 0)