a police car drives with a constant speed of 24 miles per hour .how long will it take to travela distance of 72 miles
1 answer:
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The combined momentum is 4000 kg m/s south
Explanation:
The total combined momentum of the two cars is given by the vector addition of the momenta of the two cars.
For this problem, we choose north as positive direction and south as negative direction.
The momentum of the first car travelling north is given by:
where
is the mass of the car
is its velocity
Substituting,
The momentum of the second car travelling south is given by:
where
is the mass of the car
is its velocity (negative because the car travels south)
Substituting,
And therefore, the combined momentum is
where the negative sign means the direction of the total momentum is south.
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Answer:
Total work done in expansion will be
Explanation:
We have given pressure P = 2.10 atm
We know that 1 atm
So 2.10 atm
Volume is increases from 3370 liter to 5.40 liter
So initial volume
And final volume
So change in volume
For isobaric process work done is equal to
So total work done in expansion will be