Light is emitted in the visible spectrum to nearly all energies, so in the spectrum of the Sun you can see all colours. This is clearly not a continuous spectrum, but still represents visible radiation, divided into its component colours.
Just write what you did in your project
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A. CaCl2 and H2O
HCl +Ca(OH)2. CaCl2 +H2O
Average speed=the slope.
Points: (0,0) and (2.34,16.34) since the position is dependent on the time.
Use the formula m=y2-y1/x2-x1 and sub in the points
M=16.34-0/2.34-0
M=16.34/2.34
M=6.98 or 7