A) For the rectangular glass prism, plot: (1) A graph of Sin i against Sin r. Measure the slope.
(it) A graph of i against r, measure the slope.
(iii) A graph of Sini Sin r against Sin r. Measure the slope.
(iv) b) For the triangular prism, plot:
() (1) A graph of D against i and measure the value of the minimum deviation
Dm.
(vi) (ii) A graph of D against (i + e) and measure the intercept A on both axes.
From the relation Sin (A+D=n
2
Sin A
2.
Where = A refracting angle of the prism. Obtain the value of n.

Answermake them get very hot and over time wear them out;

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips. 

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3

Answer would be