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2 years ago

What is the value of the energy (in Joules) stored by the mobile phone battery (capacity of 1.8 Ah), if it is rated at 3.7 V

Engineering

2 answers:

balandron [24]2 years ago

7 0

Answer:

6.6 Joules

Explanation:

Energy = power * time

= V*I*t

= 3.7 * 1.8

= 6.6 Joules

joja [24]2 years ago

4 0

Answer:

E=23,976 J

Explanation:

Given that

I = 1.8 Ah

Voltage = 3.7 V

We know that 1 h = 3600 s

I = 1.8 x 3600 A.s

I=6480 A.s

The energy in Jules given as

E= V. I

We know that unit of V.I is Watts ( J/s) and when multiple by seconds then we get Joules.

E=3.7 x 6480 Watt.s

E=23,976 J

Therefore the energy in joule will be 23,976 J.

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Answer:

To answer this question we assumed that the area units and the thickness units are given in inches.

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Explanation:

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t: is the thickness = 0.002

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$N = \frac{m*N_{A}}{A} = \frac{59.5 g*6.022 \cdot 10^{23} atoms/mol}{207.19 g/mol} = 1.73 \cdot 10^{23} atoms$

Hence, the number of atoms of lead required is 1.73x10²³.

I hope it helps you!

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