A traffic light weighs 214.8 N and is supported by two wires with an angle of 129.4° between them. If the tensions in the wires
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The 2 decomposition reactions are:
B. (s) -->
(s) +
(g)
C. (g) -->
(g) +
(g)
Explanation:
Step 1:
A decomposition reaction is one in which a single compound breaks down into two or more products.
Step 2:
Let us examine each reaction if it satisfies the above rule.
A. 2 LiOH + --->
+
In this reaction we have 2 reactants giving 2 products. Hence this is not a decomposition reaction.
B. --->
+
In this reaction a single reactant potassium carbonate gives rise to 2 products Potassium Oxide and carbon-di-oxide. Hence this is a decomposition reaction
C. --->
+
In this reaction a single reactant sulfur tri-oxide gives rise to 2 products sulfur di-oxide and oxygen. Hence this is a decomposition reaction.
D. +
--->
In this reaction 2 reactants sodium and chlorine gives rise to a single product sodium chloride. Hence this is not a decomposition reaction.
Step 3:
Answer:
The 2 decomposition reactions are:
B. (s) --->
(s) +
(g)
C. --->
+
To solve this problem it is necessary to apply the concepts related to the kinematic equations of angular motion.
By definition, acceleration can be expressed as the change in angular velocity squared over a given period of distance traveled.
where,
Angular velocity
Angular displacement.
In turn, as a function of time, we can represent it as,
For our case we have to,
PART A) In the case of angular acceleration we have to,
PART B) Through the definition of angular acceleration as a function of time we can calculate it,