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oksian1 [2.3K]
3 years ago
6

Which of the following variables are conserved?

Physics
1 answer:
olganol [36]3 years ago
8 0

Answer: C

Explanation:

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Amy gets up from her seat on a train to move closer to the front. Just as she begins to walk forward, the train stops at a stati
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Amy's body keeps moving forward when the train stops.
She pitches forward, and if she doesn't reach out and grab
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on her face.

Choice - 'A' is a very good explanation.
The other choices aren't.

'C' is a good hunch, but it only applies to her feet.
The rest of her keeps going.

'D' is nonsense.  There are no mysterious forces of
'repulsion' or 'attraction' on the train.
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The blood vessels that carry blood away from the heart to the rest of the body are
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Arteries push blood to the rest of the body after leaving the heart.
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If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses that th
olga55 [171]

Answer:

f1= -350cm or -3.5m

f2= 22.1cm or 0.221m

Explanation:

A person is nearsighted when the person's far point is less than infinity. A diverging lens is normally used to correct this eye defect. A diverging lens has a negative focal length as seen in the solution attached.

Farsightedness is when a person's near point is farther than 25cm. This eye defect is corrected using a converging lens. The focal length of a converging lens is positive. This is evident in the solution attached. The near point is also referred to as the least distance of distinct vision.

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Following a car accident, a person is able to walk, but she is not able to move her arms. This person most likely severed
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how many days does it take a team of drivers to drive a truck california and back to lansing if the drivers average 15m/s includ
malfutka [58]

4days and 12hours

Explanation:

Given parameters:

Average speed  = 15m/s

Distance = 1800 miles

Unknown:

Number of days = ?

Solution:

Speed is the rate of change of distance with time;

          Speed = \frac{distance}{time}

Since the unknown is number of days, it is a measure of time:

    Time = \frac{distance }{speed}

The distance from California to Lansing is 1800miles. The journey takes the truck drivers to and fro. It is a two way trip;

 Total distance = 1800 miles x 2 = 3600miles

We need to convert miles to meters since that is the unit we can conveniently work with;

            1 mile = 1609.34m

          3600 miles =  3600 x 1609.34

                              = 5793638m

Inputting the values in the equation:

          Time = \frac{ 5793638}{15} = 386242.53s

Now we need to convert to day;

In a day, = 60 x 60 x 24 = 86,400s

                 1 day = 86400s

 Therefore;

  The number of days = \frac{386242.53}{86400} = 4.47days

This implies that it will take them 4 days and approximately 12 hours.

learn more:

speed brainly.com/question/10048445

#learnwithBrainly

7 0
3 years ago
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