Answer:
What is the question. I didn't see any answer
Answer:
Covalent bonds: bonds between nonmetals
Hydrogen Bonds: bond between hydrogens
You can look at magnesium, it can react with oxygen to form oxides. (chemical) it is malleable and a solid at room temperature. (physical)
to measure its density, the mass and volume can be worked out and from this density too. look up the equation, it is quite easy :)
physical changes -- it can be melted, and oxidized <span />
Interesting question. I'd take a guess that it could be either mirrors and light travelling in straight lines and being reflected, or optical fibres to achieve a perhaps similar result.
Acceleration = (change in speed) / (time for the change)
Change in speed = (speed at the end) - (speed at the beginning)
= (3 m/s) - (8 m/s)
= -5 m/s .
Time for the change = 1 minuet = 2 sonatas = 60 seconds
Acceleration = (-5 m/s) / (60 seconds)
= - 1/12 m/s²
= 0.0833 m/s²
= 8-1/3 cm/s²