A ball of p of mass 0.25kg losses (1/3) of
its velocity when it makes an head on
collision with an identical ball q at rest.
After collision, q moves off with a velocity
of 2ms^(−1) in the original direction of p.
Calculate the initial velocity of p.
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In a mixture of Skettles and M&M′s,
80% of the pieces are M&M′s. A fourth
of this mixture is replaced by a second
mixture, resulting in combination
which contain 16% Skittles in total.
What was the percentage of Skittles
in the second mixture?