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Yuliya22 [10]
3 years ago
14

What is the change in internal energy of the system (∆U) in a process in which 10 kJ of heat energy is absorbed by the system an

d 70 kJ of work is done by the system?
Physics
1 answer:
Trava [24]3 years ago
8 0

Answer:

Explanation:

According to first law of thermodynamics:

∆U= q + w

= 10kj+(-70kJ)

-60kJ

, w = + 70 kJ

(work done on the system is positive)

q = -10kJ ( heat is given out, so negative)

∆U = -10 + (+70) = +60 kJ

Thus, the internal energy of the system decreases by 60 kJ.

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Answer:

The answer is Watt

Explanation:

Electricity is measured in Watts and kilowatts

Electricity is measured in units of power called Watts, named to honor James Watt, the inventor of the steam engine. A Watt is the unit of electrical power equal to one ampere under the pressure of one volt. One Watt is a small amount of power.

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3 years ago
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How much heat energy must be added to 52kg Of water at 68°F to raise the temperature to 212°F? The specific heat capacity for wa
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Answer:

The amount of energy added to rise the temperature Q = 17413.76 KJ

Explanation:

Mass of water = 52 kg

Initial temperature T_{1} = 68 °F = 20° c

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Specific heat of water  C = 4.186 \frac{KJ}{kg c}

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⇒ Q = 52 × 4.186 × ( 100 - 20 )

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2 years ago
How do you explain newton’s second law
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Answer:

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Explanation:

Hope you get it right!

8 0
2 years ago
How much energy is needed to raise the temperature of a 55g sample of aluminum from 22.4 to 94.6?
BaLLatris [955]
The heat needed is given by Mcθ , where m is the mass in Kg, c is the heat capacity of aluminium, and θ is the change in temperature. 
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3 0
3 years ago
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