Question

(177 °C)
4. A gas occupies 7.6 La
5. A sample of methane occupies 320 mL at 47 °C. To what temperature (in degrees Celsius) will it have to be heated to
occupy 450 mL at the same pressure?
6. A sample of helium gas occupies 55 mL at 24 °C. To what temperature (in degrees Celsius) must it be cooled, at
roduce its yolume to 25 mL?
(-138 °C
to​

Answer 1

Answer:

The work needed to be done is 156187 J.

Given :

Initial velocity(u) = 30 km/h = 30 × 5/18 = 25/3 m/s.

Final velocity(v) = 60 km/h = 60 × 5/18 = 50/3 m/s

Mass = 1500 kg

To Find :

Work needed to be done = ?

Solution :

We know the formula to calculate the work done,

So by using it,

➠ Work done = 1/2mv² - 1/2mu²

➠ W = m/2(v²-u²)

➠ W = 1500/2(50/3²-25/3²)

➠ W = 156187 J

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➤ Additional information :

Work is done when a force that is applied to an object moves that object or body!!

The work is calculated by multiplying the force by the amount of movement of an object itself !!

Formula = f × d

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