3 years ago

A car goes North a distance of 120 kilometers during a time period of 3.0 hours. What is the average

Physics

1 answer:

DIA [1.3K]3 years ago

8 0

Answer:

the average speed of the car during this time interval is 40 m/s i thinkk..

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If you saw a waxing gibbous moon what phase would you expect one week later?

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3 years ago

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melisa1 [442]

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2 years ago

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The space velocity of a star is 120 km/s and its radial velocity is 72 km/s. what is its tangential velocity?

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2 years ago

A heat engine with 0.500 mol of a monatomic ideal gas initially fills a 1000 cm3 cylinder at 700 K . The gas goes through the fo

Zarrin [17]

Answer:

2234.63

Explanation:

Work done per cycle by the engine is calculated as;

$W=\int p \ dv$

#Since volume doesn't change in the isochoric steps, there is no work done, hence:

$W_2=W_3=0$

#For an isothermal change of state(ideal gas):

$pV=nRT\\\\W=P_iV_ i\int \frac{1}{V} \ dV\\\\=P_iV_ iIn(V_f/V_i)$

#for the expansion process:

$W_i=0.5mol\times8.3145J/molK\times 700K \ In(6000cm^3/1000cm^3)\\\\W_i=5214.15J$

$W_4=0.5mol\times8.3145J/molK\times 400K \ In(6000cm^3/1000cm^3)\\\\W_4=-2979.52$

$W=W_1+W_2+W_3+W_4\\\\=5214.15J-2979.52\\\\=2234.63J$

Hence, the engine does 2234.63J per second.

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3 years ago

Average speed of a runner runs 500 .o min. 1.6 min is

ch4aika [34]

<span>I believe your answer will be 5.2 meters </span>

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2 years ago