What happens when waves reach the shoreline?
1 answer:
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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. --->
+
Answer:
The turntable's angular speed after the event is 28.687 revolutions per minute.
Explanation:
The system formed by the turntable and the two block are not under the effect of any external force, so we can apply the Principle of Conservation of Angular Momentum, which states that:
(1)
Where:
- Moment of inertia of the turntable, in kilogram-square meters.
- Distance of the block regarding the center of the turntable, in meters.
- Mass of the object, in kilograms.
- Initial angular speed of the turntable, in radians per second.
- Final angular speed of the turntable-objects system, in radians per second.
In addition, the momentum of inertia of the turntable is determined by following formula:
(2)
Where is the mass of the turntable, in kilograms.
If we know that ,
,
and
, then the angular speed of the turntable after the event is:
(
)
The turntable's angular speed after the event is 28.687 revolutions per minute.