A physical (beam) is used to measure?
2 answers:
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Answer:
2KI + Cl₂ → 2KCl + I₂
Explanation:
The reaction equation is given as:
KI + Cl₂ → KCl + I₂
The problem at hand is to balance this chemical reaction. To solve this problem we use a mathematical approach;
aKI + bCl₂ → cKCl + dI₂
Conserving K : a = c
I : a = 2d
Cl : 2b = c
Now let a = 1, c = 1 , d = , b =
, ;
Multiply through by 2;
a = 2, b = 1 , c = 2, d = 1
2KI + Cl₂ → 2KCl + I₂
Answer:
.
Explanation:
Let and
denote the velocity of this hockey player before and after stopping, respectively. The question states that
and implies that
since the hockey player has come to a stop.
The duration of this acceleration is .
Since the acceleration of this hockey player was constant, SUVAT equation would apply. In particular, the SUVAT equation gives the displacement
of this hockey player during that
of acceleration:
.
In other words, this hockey player would have travelled while stopping.