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laila [671]
3 years ago
4

An electromagnet is created using a battery, an insulated copper wire, and an iron nail. The wire is wrapped around the nail 20

times and attached to the battery. Which pair of changes will definitely increase the strength of the electromagnet?
Physics
2 answers:
Veseljchak [2.6K]3 years ago
4 0
Think of each turn as a tiny electromagnet, and they all add up. So increasing the number of turns will increase the magnet strength. And if the current increases then the magnetic field strength increases. Current = Voltage/Resistance. So increasing the voltage will increase the current.
so if there is "Increase the voltage of the battery and increases the number of turns of the coil" then that option should be the answer 
Roman55 [17]3 years ago
4 0

^The answer is C if doing USA test prep !!!


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How did the magnet’s density measurement using the Archimedes’ Principle compare to the density measurement using the calculated
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Answer:

The two methods will yield different results as one is subject to experimental errors that us the Archimedes method of measurement, the the density measurement method will be more accurate

Explanation:

This is because the density method using the calculated volume will huve room for less errors that's occur in practical method i.e Archimedes method due to human error

5 0
3 years ago
An advantage of parallel circuits is that they A) stop transmitting all current if even one resistor breaks. B) form a single pa
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Parallel circuits allow current to flow even if some paths are cut, because a parallel circuit has more than one current-carrying path through it.

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3 years ago
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A block of mass 10.0 kg is pulled to the right along a rough horizontal surface with a constant horizontal force of 20.0 N. The
Yakvenalex [24]

Answer:

the magnitude of acceleration will be 1.50m/s^2

Explanation:

To calculate your acceleration, you can use your formula that states that the net force on an object is equal to the mass of the object multiplied by the acceleration of the object. Fnet=ma

if you draw out this situation and label the forces you will have your vector towards the right with a magnitude of 20.0N and then your friction vector will be pointing to the left (in other words, in the negative direction) (opposing the direction of movement) with a magnitude of 5.00N, with the 10.0 kg box in the middle.

The net force will be calculated using F1+F2=Fnet where your F1=20.0N and F2= -5.00N (since it is towards the negative direction).

you will find that Fnet=15.0N

With that, plug in the values you know to calculate the acceleration of the block:

Fnet=ma

(15.0N)=(10.0kg)a    from her you can divide both sides by 10 to isolate a:

1.50=a  (and now make sure to label the units of your answer)

a=1.50m/s^2 (which is the typical unit for acceleration)

7 0
3 years ago
HELP!!!! WILL MARK BRAINLIEST!!!! IF YOU LEAVE AN ANSWER EXPLAIN! THANKS
Travka [436]

Answer:

the answer is C

Explanation:

we know this because if you compare the graphs and look at the direction. it isn't always in the explanation or the few sentences they gave you at the top. also, look at the waves, you can see in Davids drawing that it is directly straight up, A and B do not represent that. A isn't even a valid answer. Notice also in A that the arrow is going in the completely different direction than in Davids drawing. B is also going a different direction even though it is only turned a little bit although if it was straight up like Davids drawing then it would most likely be a correct answer. C does have one arrow going a different direction but look at how it has two, showing in which if the waves were to turn then the arrow is still valid

7 0
3 years ago
Scientists are constantly exploring the universe, looking for new planets that support life similar to the life on
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The answer would be “B” because humans would need water, protection from radiation so we don’t melt or burn to death lol, and a gaseous atmosphere because we would need oxygen.
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