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lawyer [7]
3 years ago
8

A man steps out of a plane at a height of 4000 m above the ground, falls

Physics
1 answer:
lidiya [134]3 years ago
3 0
Ch to C k it b be no
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the density of a substance is 1.63 grams per mililiter what is the mass of 0.25 liters of the substance in grams?
Ira Lisetskai [31]
<h2>Answer </h2>

The answer to this question is <u>407.5 g</u>

<h2>Explanation</h2>
  • The density of the substance = 1.63 g/ml
  • The volum of the substance = 0.25 L
  • Mass of the substance = ? (Determined)

We know that

1L = 1000ml

So, 0.25 L will be equal to 250 ml. ( Unit must be same)

Formula

Density = Mass/ Volume

1.63 = Mass/ 250 ml

1.63 * 250 = Mass

407.5 g = Mass

Se, mass of the substance is 407.5 g

7 0
4 years ago
Select the correct location on the image.<br> Identify the magnetic north pole of Earth’s magnet.
OverLord2011 [107]

The magnetic north pole of the earth's magnet is in the geographic south pole.

  • There are two magnetic and geographic poles each, north and south
  • The two geographic poles are the locations where the earth's axis of rotation passes through which is imaginary
  • The magnetic north and south poles are not the same as the geographic north and south poles
  • In a compass, the needle points to the magnetic north pole
  • By convention, the magnetic north pole corresponds to the geographic south pole
  • The magnetic south pole corresponds to the geographic north pole
  • The magnetic field lines of a magnet start from the magnetic north pole and end at the magnetic south pole

The magnetic north pole of the earth's magnet is the geographic south pole.

Learn more about earth's magnetism here:

brainly.com/question/3928159

#SPJ10

8 0
2 years ago
Why do faults often occur along plate boundaries?
Slav-nsk [51]
Earthquakes can also occur far from the edges of plates, along faults. Faults<span> are cracks in the earth where sections of a plate (or two plates) are moving in different directions. Faults are caused by all that bumping and sliding the plates do. They are more common near the edges of the plates.</span>
4 0
3 years ago
If you could use an elevator or the stairs to lift a box to the tenth floor,which has greater power?why?
Nostrana [21]
Stairs don't HAVE any power. When you use the stairs, YOU have to provide all the power. I would use the elevator, because the machinery that runs it produces the power and I only have to stand there.
7 0
4 years ago
The combined focal length of two thin lens is 24 cm and the focal length of one converging lens is 8
qwelly [4]

Answer: f = -12 cm

Explanation: <u>Combined</u> <u>lenses</u> is an array of  simple lenses with a common axis. The combination is useful for correction of optical aberrations which cannot be corrected by simple lenses.

When two lenses are in contact and are thin, focal lengths are related as:

\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}}

If there is a distance between the lenses, the focal length will be:

\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}} -\frac{d}{f_{1}f_{2}}

Since the lenses in the question above are thin and in contact, the focal length of one of them will be:

\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}}

\frac{1}{f_{2}} =\frac{1}{f_{1}} -\frac{1}{F}

\frac{1}{f_{2}} =\frac{1}{8} -\frac{1}{24}

\frac{1}{f_{2}} =\frac{-2}{24}

f_{2}= -12

The focal length of the other lens is -12 cm, with the negative sign meaning it's a converging lens.

7 0
3 years ago
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