The the strength of an electromagnet varies with the quantity and direction of current as well as the number of turns in the coil.
<h3>What as is an electromagnet?</h3>
An electromagnet is a material which operates by the principle of electromagnetism.
Electromagnets possesses both electrical and magnetic properties.
The strength of an electromagnet is affected by the current, the number of turns as well as the material of the electromagnet.
The strength of the given electromagnet will be affected thus:
- increases when using a battery with a higher voltage
- decreases when wrapping the wire around the nail only three times
- is unchanged when changing the direction of the current by reversing the battery connections
- decreases when using a plastic stick in place of the iron nail
- is greatest when holding the nail vertically rather than horizontally.
Therefore, the strength of an electromagnet is affected by current and number of turns in the coil.
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Endothermic change hope this helps.
<u>Answer:</u> The value of for the given chemical equation is 0.0457.
<u>Explanation:</u>
Given values:
Initial moles of = 0.700 moles
Volume of conatiner = 3.50 L
The given chemical equation follows:
I: 0.700
C: -2x +2x x
E: 0.700-2x 2x x
Equilibrium moles of = x = 0.180 moles
Equilibrium moles of = 2x =
Equilibrium moles of = 0.700 - 2x =
Molarity is calculated by using the equation:
So,
The expression of for above equation follows:
Plugging values in above expression:
Hence, the value of for the given chemical equation is 0.0457.
Answer:
ε = 201.5
Explanation:
Given data-
mass of benzene = 25.8 mg
= 25.8×10^-3 kg
Atomic mass of benzene= 78.11 amu
volume of hexane = 250.00 ml = 0.2500 L
Absorbance = 0.266
Length of the cell = 1.00 cm
Hence concentration =
solving we get
= 0.00132 M
Formula:
A= εcl
A= absorbance
c= concentration and l= length of cell
now substituting values in the above formula
0.266= ε×0.00132×1.000
⇒ε =
⇒ε = 201.5