Oxygen is a reactant in a combination reaction, which always produces energy in the form of heat and light. A. True B. False
2 answers:
Answer: The given statement is false.
Explanation:
Combination reactions are defined as the reactions in which two or more substances that can be either elements or compounds when combine together then they result in the formation of a single compound.
For example,
Also, when oxygen atom combines with another substance then it is known as a combustion reaction. And, a combustion reaction will always release energy as they are exothermic in nature.
But is not necessary that light will always be produced in a combustion reaction.
Hence, we can conclude that the statement oxygen is a reactant in a combination reaction, which always produces energy in the form of heat and light, is false.
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The given question is incomplete. The complete question is as follows.
A parallel-plate capacitor has capacitance = 8.50 pF when there is air between the plates. The separation between the plates is 1.00 mm.
What is the maximum magnitude of charge that can be placed on each plate if the electric field in the region between the plates is not to exceed V/m?
Explanation:
It is known that relation between electric field and the voltage is as follows.
V = Ed
Now,
Q = CV
or, Q =
Therefore, substitute the values into the above formula as follows.
Q =
=
=
Hence, we can conclude that the maximum magnitude of charge that can be placed on each given plate is .
Answer:
21s
Explanation:
Given parameters;
Radius = 10m
Speed or velocity = 3m/s
Unknown:
Period = ?
Solution:
To solve this problem, use the expression:
v =
r is the radius
T is the unknown
Input the parameters and solve for T;
3 =
62.84 = 3T
T = 21s