Answer:
Assuming you mean how they work,
Explanation:
Electromagnets work by wrapping the wire around an iron core and attaching it to an electric charge.
Aha! This is a fun question, likely AP Physics 1 if I'm not mistaken. This is how you solve it, you need the following equation.

Now on this question you don't need to actually use the mass and diameter of the earth as we are only
looking at the
factor of how much your weight would change, so you can just plug in some random numbers for the mass and radius. In my case I will use the original radius as being
2 meters and the original mass of the earth as being
20kg. You can actually just omit the mass of your body and the gravitational constant isn't necessary to be multiplied by because they will remain the same in both scenarios.
Original weight:


So the original weight in this circumstance is 5N. Now then if we double the mass to
40kg and the radius to
4m you will have the following.


So the original weight was 5N and after doubling the mass and radius the weight reduced to 2.5N. This means the factor which your weight would change by is .5 or decrease by 1/2.
I hope this helps you :) You can ask me if you have any additional physics questions.
<span>A)the paper clip is repelled away from the nail because an electromagnetic field magnetized the nail</span>
Answer: option A is correct
Explanation:
This is a constructive interference by the two sources responsible for the pattern that is why they appear to be single source.
(a) The height above the earth's surface of the parking orbit is determined from the difference between the orbital radius and earth's radius (h = r - R).
(b) Velocity of the satellite of the earth is determined with a formula given as (2π/T)r.
<h3>Height above the earth's surface </h3>
The height above the earth's surface is calculated using the following formula;

where;
- T is time period of the satellite
- r is orbital radius
r = h + R
h = r - R
where;
- h is height above the earth's surface
- R is radius of earth
<h3>Velocity of the satellite</h3>
The velocity of the satellite is determined using the formula below;
v = ωr
v = (2π/T)r
Learn more about velocity of satellite here: brainly.com/question/22247460
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