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maksim [4K]
2 years ago
8

What other uses does petroleum have besides being used for fuel and lubricants

Physics
1 answer:
Alborosie2 years ago
7 0
the answer i think is asphalt and plastic
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What is the period of a wave if the wavelenght is 110m and the speed is 200m/s? 2 s 100s 200,000 s 0.5 s
cestrela7 [59]
Hello.

The answer would be <span> 0.5 s

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An object's starting position is at point A and its final position is at point B.
salantis [7]
B- we would need the time to fulfill the formula distance = speed x time
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you check the weather and find that the winds are coming from the west at 15 milers per hour. this information describes the win
nydimaria [60]

Answer:

Velocity

Explanation:

We finds that the winds are coming from the west at 15 miles per hour. This information shows the velocity of the wind. Since, velocity is a vector quantity. It has both magnitude and direction. 15 miles per hour shows the speed of wind and west shows the direction of wind motion.

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6 0
3 years ago
A railroad car moves under a grain elevator at a constant speed of 3.20 m/s. Grain drops into the car at the rate of 240 kg/min.
dedylja [7]

Answer:

F = 768 N                  

Explanation:

It is given that,

Speed of the elevator, v = 3.2 m/s

Grain drops into the car at the rate of 240 kg/min, \dfrac{dm}{dt}=240\ kg/min = 4\ kg/s

We need to find the magnitude of force needed to keep the car moving constant speed. The relation between the momentum and the force is given by :

F=\dfrac{dp}{dt}

F=m\dfrac{dv}{dt}+v\dfrac{dm}{dt}

Since, the speed is constant,

F=m\dfrac{dv}{dt}

F=v\dfrac{dm}{dt}

F=3.2\times 240

F = 768 N

So, the magnitude of force need to keep the car is 768 N. Hence, this is the required solution.

5 0
3 years ago
I need a short written description of Newton's three laws.
Tom [10]
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3 years ago
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