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astra-53 [7]
3 years ago
12

what is the energy required to melt down a 12,400g Gold bar assuming its temperature goes from 23c to 1,064c

Physics
1 answer:
sergejj [24]3 years ago
5 0

1665183.6J

Explanation:

Given parameters:

Mass of Gold = 12400g

Initial temperature = 23°C

Final temperature = 1064°C

Unknown:

Energy required to melt = ?

Solution:

The amount of heat required to cause this temperature change to heat the gold bar is given as;

   H    =   m  c Ф

 m is the mass of gold bar

  c is the specific heat capacity of gold

  Ф is the heat change

 Specific heat capacity of gold = 0.129J/g°C

  H = m c (Ф₂ - Ф₁)

 H = 12400 x 0.129 x (1064 - 23) = 1665183.6J

learn more:

Specific heat capacity brainly.com/question/7210400

#learnwithBrainly

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A 1. 0 μf capacitor is being charged by a 9. 0 v battery through a 10 mω resistor.
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The potential across the capacitor at t = 1.0 seconds, 5.0 seconds, 20.0 seconds respectively is mathematically given as

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<h3>What is the potential across the capacitor?</h3>

Question Parameters:

A 1. 0 μf capacitor is being charged by a 9. 0 v battery through a 10 mω resistor.

at

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  • 5.0 seconds
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Generally, the equation for the Voltage is mathematically given as

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Complete Question

A 1.0 μF capacitor is being charged by a 5.0 V battery through a 10 MΩ resistor.

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