A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how many turns are in the secondary? A. 1,653
B. 690
C. 72
D. 8

Answers

Answer 1

Answer: There are numerous information's of immense importance already given in the question.
Primary voltage of the transformer (V1) = 115 V
Secondary voltage of the transformer (V2) = 24 V
Number of turns in the primary (T1) = 345
Let us assume the number of turns in the secondary = T2
Then
(V1/V2) = (T1/T2)
(115/24) = 345/T2
115T2 = 345 * 24
115 T2 = 8280
T2 = 8280/115
= 72
So the correct option among all the options given in the question is option "C".

Answer 2

Answer:

Answer:

The is 1653

Explanation:

Primary Voltage = # of turns in primary

Secondary Voltage # of turns in secondary

115 V = 345

24 V # of turns in secondary

115\25=4.79167

4.79167 = 345

# of turns in secondary

4.79167 * 345 = 1653.12

When rounded 1653

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CHEMISTRYWhich of the following properties of an element is least likely to change with beta decay?

A. the mass number
B. the period number
C. the atomic number
D. the name of the element

When a nucleus has too many protons, it can absorb an electron and create _________.

A. a proton
B. a neutron
C. an electron
D. an alpha ray

Which of the following occurs in beta decay?

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B. A neutron of an atom emits a high energy electron.
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Answers

number 1.c
number 2.a
number 3.b
number 4.d

Answer:

Which of the following occurs in beta decay?

Answer: A neutron of an atom emits a high energy electron.

Explanation:

Via Educere/ Founder's Education

Which of the following is a heterogeneous mixture?A. Oil and Vinegar
B. Air
C. Milk
D. Vinegar in water

Answers

Answer:

Explanation:

b/c air is not seen by eye

The difference between a molecule and a compound is that a compound is made up of atoms from .A chemical change creates a new

Answers

Answer:

Explanation:

The difference between the molecule and compound is that molecule is made up of atoms of same element while compound is made up of atoms from different elements.

Molecule:

When the atoms of same elements combine they form molecule. In molecule atoms are combined together by covalent bond.

For example,

H₂ is the molecule of hydrogen in which two hydrogen atoms combined together through covalent bond.

Compound:

When the atoms of different elements combine they form compound. In compound atoms are combined through ionic bond.

For example,

NaCl is compound it is formed by the combination of atoms of sodium and chlorine. The electron form sodium is gained by the chlorine and form ionic bond.

2) A chemical change creates a new species.

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

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H 2 (g) + O 2 (g) -------------------------------------> 2H2O

Answer:

The difference between a molecule and a compound is that a compound is made up of atoms from

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.Explanation:

After creating a Beer's Law plot using standard solutions of Q, you determined the slope of Beer's Law to be 0.543 M-1. Your unknown solution of Q tested in Part B of the experiment had an absorbance of 0.144. Determine the concentration (in molarity) of the unknown solution Q from Part B. Do not use scientific notation or units in your response. If Carmen adds zeros after the decimal place, your answer will still be graded correctly.

Answers

Answer : The concentration (in molarity) of the unknown solution Q is, 0.265

Explanation :

Using Beer-Lambert's law :

$A=\epsilon * C* l$

where,

A = absorbance of solution

C = concentration of solution

l = path length

$\epsilon$ = molar absorptivity coefficient

From the Beer's Law plot between absorbance and concentration we concldue that the slope is equal to $\epsilon * l$ and path length is 1 cm.

As we are given that:

Slope = 0.543 M⁻¹

and,

Slope = $\epsilon * l$

$\epsilon * l=0.543M^(-1)$

$\epsilon * 1cm=0.543M^(-1)$

$\epsilon=0.543M^(-1)cm^(-1)$

Now we have to determine the concentration (in molarity) of the unknown solution Q.

Using Beer-Lambert's law :

$A=\epsilon * C* l$

$0.144=0.543M^(-1)cm^(-1)* C* 1cm$

$C=0.265M$

Therefore, the concentration (in molarity) of the unknown solution Q is, 0.265

A 1.0 liter container is filled with 0.300 M ofPCl5 at 250◦C. The vessel is then held at a
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comes to equilibrium. It is found that the
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Answers

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Equilibrium constant Kc can be found with this:
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