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Butoxors [25]
3 years ago
10

How much heat transfer is required to raise the temperature of a 0.750-kg aluminum pot containing 2.50 kg of water from 30.0 °C

to the boiling point and then boil away 0.750 kg of water?

Physics
1 answer:
ICE Princess25 [194]3 years ago
4 0

Answer:

(a) How much heat transfer is required to raise the temperature of a 0.750-kg aluminum pot containing 2.50 kg of water from 30.0 °C to the boiling point and then boil away 0.750 kg of water?

(b) How long does this take if the rate of heat transfer is 500 W? 1 watt = 1 joule / second (1W = 1 J/s).

(a)  The total heat required is 2.47 × 10 ⁶ J

(b)  It takes 82.3 min

Explanation:

see the attached file

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A firefighter with a weight of 707 N slides down a vertical pole with an acceleration of 2.79 m/s2, directed downward. (a) What
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The vertical force acting on the firefighter = 908.27 N

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Force: Force of a body is defined as the product of mass and its acceleration. The S.I unit of force is Newton (N)

The vertical force acting on the firefighter = Force due to the weight of the firefighter + force due to acceleration.

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Where Ft = The vertical force acting on the firefighter, Fw = Force due to the weight of the firefighter, Fa = force due to acceleration.

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Making m the subject of formula in the equation above

m = Fw/g................... Equation 1

Where m = mass of the firefighter, g = acceleration due to gravity,

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Substituting these values into eqaution 1

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<em>And m = 72.14 kg</em>

Fa = 72.14 × 2.79

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