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3 years ago

When all of the magnetic domains line up on their own, the material is called ____________________.

2 answers:

5 0

It's actually called ferromagnetic but they didn't put that as a option so i'm not sure which one they are referring to but i'ma go with i think the answer is D:A permanent magnet since once they combine they are permanent and they down break lose or go away

Yea that's my answer sorry if it is incorrect Have a great day and spread love into the world!Btw that's my memo just so u know--know XD...!!!!!.

Gelneren [198K]3 years ago

3 0

Probably C...:):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):):)

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An airplane is flying at a speed of 200 m/s in level flight at an altitude of 800 m. A package is to be dropped from the airplan

MArishka [77]

Answer:

2560m or 2.56km (rounded to 3 significant figures)

Explanation:

First, list all known and desired values/variables (initial vertical velocity is 0 as the plane is kept level and vertical acceleration is just gravity):

$Vertical \ velocity \ (\frac{m}{s} ) = u_{v} = 0 \\\\ Horizontal \ velocity \ (\frac{m}{s} ) = u_{h} = 200\\\\ Vertical \ acceleration \ (\frac{m}{s^{2} } ) = a_{v} = 9.8 \\\\ Horizontal \ acceleration \ (\frac{m}{s^{2} } ) = a_{h} = 0 \\\\ Vertical \ displacement \ (m) = s_{v} = 800 \\\\ Horizontal \ displacement \ (m) = s_{h}$

The horizontal displacement is going to be the distance travelled, horizontally of course, once the package is released;

First thing to understand is that the vertical and horizontal components are to be dealt with separately because they don't affect each other;

Since there is no horizontal acceleration (ignoring air resistance), we simply require a velocity and time to find the horizontal displacement, using the formula v = d/t (or speed = distance/time);

What we have is the horizontal velocity but we don't have the time taken;

One thing we know is that the time elapsed for the vertical fall of 800m and for the horizontal displacement must be the same;

What we do, therefore, is find the time taken for the vertical displacement using the formula, s = ut + ¹/₂·at², since we know the vertical velocity, height and acceleration:

800 = (0)t + ¹/₂·(9.8)t²

800 = 4.9t²

t² = 163.26...

t = 12.77...

We now have the time taken for the vertical fall and the horizontal displacement, we can use this with the horizontal velocity we know already and get the horizontal displacement:

$u_{h} = \frac{s_{h} }{t} \\\\ 200 = \frac{s_{h} }{12.77...} \\\\ s_{h} = 200(12.77...) \\\\ s_{h} = 2555.5...$

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2 years ago

What characteristics distinguish the inner planets in the solar system from the outer planets?

Julli [10]

The four inner plants have shorter orbits slower spin ,no rings ,and they are made up of rock and metal
The outer plants are made up of hydrogen and helium, so they are called gas giants

Explanation:

hope it is the right answer

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2 years ago

What happens to a satellite that slows down?

Bess [88]

Two things can happen to <u>old satellites</u>: For the closer satellites, engineers will use its last bit of fuel to slow it down so it will fall out of orbit and burn up in the atmosphere. Further satellites are instead sent even farther away from Earth.

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3 years ago

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What is the resistance force when you walk up an inclined plane?<br> Please help quick!

Dominik [7]

Friction
Friction also affects the movement of an object on a slope. Friction is a force that offers resistance to movement when one object is in contact with another. Imagine now that you were on the downside of the object and applying force to keep the object in the same place (not moving)

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2 years ago

Acceleration is often measured in what unit? A. newtons B. kilograms C. meters per second D. meters per second squared

spayn [35]

D. meters per second squared

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