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kicyunya [14]
3 years ago
10

How much heat is needed to raise the temperature of 2 kg of copper from 20º to 30ºC. The specific heat of copper is 390 J/kgºC.

Physics
1 answer:
ryzh [129]3 years ago
3 0

Answer:

7800 J

Explanation:

Heat needed = mass of copper x specific heat of copper x change in temperature  

Change in temperature = 30ºC - 20ºC = 10ºC

Specific heat of copper = 390 J/kgºC

Mass of copper = 2 Kg

Substituting the given values in above equation, we get –  

Heat needed = 2 Kg x 390 J/kgºC x 10ºC

= 7800 J

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It is also named as semi-variable costs. And the formula to calculate mixed cost is as follows,

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You traveled a distance of 620.075 meters if it takes you 8.5 seconds to stop.

<u>Given the following data:</u>

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We know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.

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Mathematically, the second equation of motion is given by the formula;

S = ut + \frac{1}{2} at^2

Where:

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Substituting the parameters into the formula, we have;

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Therefore, you traveled a distance of 620.075 meters if it takes you 8.5 seconds to stop.

Read more: brainly.com/question/8898885

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