How do electromagnets differ from regular magnets?
Answer:
Permanent Magnets and Electromagnets: What are the Differences? A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. ... An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it.
Step-by-step explanation:
Electromagnets differ from regular magnets in that they require an electric current to generate a magnetic field.
Regular magnets, also known as permanent magnets, possess an inherent magnetic field due to the alignment of their atomic or molecular structure. They do not require an external power source.
On the other hand, electromagnets are made by wrapping a coil of wire around a magnetic core and passing an electric current through the wire. The electric current creates a magnetic field, and the strength of the magnetic field can be controlled by varying the current.
One key advantage of electromagnets is their ability to be turned on and off by controlling the electric current. This feature allows for a wide range of applications, such as in electric motors, generators, speakers, magnetic levitation systems, and more, where the magnetic field needs to be controlled or modulated. In contrast, regular magnets have a constant magnetic field that cannot be easily manipulated.
To know more about Electromagnets:
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Evaluate: 2b+5 when b=3
Answer:
11
Step-by-step explanation:
2(3)+5
6+5
11
Answer:
11
Step-by-step explanation:
2b+5, when b is 3
substitute 3 into 2b+5
2(3)+5
6+5 =11
Unit 8: right triangles and trigonometry
Homework 2: special right triangles
HELP PLEASE!!
Answer:
x=50
y=25
Step-by-step explanation:
So for this triangle we can use trig. To find side x (the hypotenuse) we can do sin60 degrees. *remember SOHCAHTOA, so sin is opposite over hypotenuse.
sin60degrees=(25 * sqrt of 3)/x
multiply each side by x to get xsin60degrees=25*sqrt of 3. Then divide both sides by sin60degrees. Plug that in a calculator and you should get 50.
For side y, well you can use the characteristics of 30-60-90 triangles and by doing this we know that the short leg of this type of triangle is HALF of the hypotenuse and half of 50 is 25. If you didn't know this you could still use the cos of 60 degrees and get 25 as well.
Please help fast! !! Quick ! What is the area ?
Answer:
153
Step-by-step explanation:
break it up in pieces 6x12 + 4x4 + 13x5 = 153
The ratio of daisies to roses in a garden is 20:1. Does this garden have more roses or more daises in the garden
Answer:
daisies
Step-by-step explanation:
please helppp me anyone
Answer:
7
Step-by-step explanation:
help pls asap!!! i’ll give brainliest
Answer:
I THINK ITS B lmk if I'm wrong
Aiden wanted to drive, so he took a state test. He earned a score of 85 percent. If there were 20
questions on the test, how many questions did Aiden answer correctly?
Answer:
17
Step-by-step explanation:
20x5=100
85/5=17
12 POINT HURRY HURYRJXNXNDJDJDNDN
Answer:
The fourth choice, Pink, is the correct answer.
Step-by-step explanation:
The first two options intersect, therefore the intersection is the solution. The third set of lines may seem like one line, however since we are dealing with two linear equations, it can be presumed that those are two lines on top of one another, therefore it has infinite solutions. The last option remaining is Pink, in which the lines are parallel and therefore will never intersect, making them have no solution.
please help i dont know what to do
Answer:
-15 + -3 = -18
Rob owes his father $18.
Step-by-step explanation:
Rob has to pay back the same amount of money that he took. Since he took 15 dollars, he has to give back 15 dollars which makes the 15 negative. The same goes for the 3 in the equation.
To find out the total amount Rob has to pay back, we have to add -15 and -3, which is -18.
Answer question from the images below Ig..
Answer:
AC, CB
Step-by-step explanation:
A segment needs two endpoints. The third answer is the only one that can contain two segments, other answers contain single points.
Which side in WXYZ corresponds to OP in MNOP
A. XW
B. XY
C. YZ
D. MN
Answer:
Y and Z because just move the shape side ways and u can find the corresponding side.
I swear y’all are mean for not helping me on this :( I just need to know how many lines of symmetry there are but I can’t figure out how many.
Answer:
A
Step-by-step explanation:
I would say 0
Find the sum Adding and Subtracting Polynomials (2n2−5n−6)+(−n2−3n+11)=
[tex] = (2 {n}^{2} - 5n - 6) + ( - {n}^{2} - 3n + 11)[/tex]
[tex] = 2 {n}^{2} - 5n - 6 - {n}^{2} - 3n + 11[/tex]
[tex] = 2 {n}^{2} - {n}^{2} - 5n - 3n - 6 + 11[/tex]
= (n²-8n+5)→Answer
I hope that it answer your question...
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Samuel bought snacks for his team's practice. He bought a bag of chips for $2.81 and
a 15-pack of juice bottles. The total cost before tax was $25.01. How much was each
bottle of juice?
Answer:
Each juice cost $1.48
Seventeen thousand in standard form
Answer:
i dont know the answer may be search on chrome
Answer:
17 x 10³
Step-by-step explanation:
Standard form is a way of writing down very large or very small numbers easily. 10³ = 1000, so 4 × 10³ = 4000 . So 4000 can be written as 4 × 10³ . This idea can be used to write even larger numbers down easily in standard form.
Solve for the missing angle. Round your answers to the nearest tenth. Figures are not drawn to scale.
Help me plzzzzzz!!!!
Answer:
50.8 degrees
Step-by-step explanation:
cos(x)=12/19
Help me pls pls pls thanks I
Answer:
T (3 , -6) O ( -6 , -4) and M (-9 , 6)
Step-by-step explanation:
(x , y) -> (-x , -y)
i need help .........
Answer:
Step-by-step explanation:
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
What do you get if you cross an insect with the easter rabbit? (Need the geometry answers)
Answer:
zda dht5646788975432
Step-by-step explanation:
In Mrs Williams's math class, there
sre 14 boys and 10 girls. Which
statcinent is not true
The ratio ofboys to girls is 14:10.
b) The ratio of girls to boys is 7:5
e) The ratio ofboys to girls is 7:5
d) Theratio of girls to boys is 30:42
I need help
please answer aspa please i need it
Answer:
I think it's C
Step-by-step explanation:
Answer:
(4, 1)
Step-by-step explanation:
Since there's a graph, the answer is the intersection: (4, 1)
But here's the cancellation method for future use :)
.
What is the final amount if 1010 is decreased by 6% followed by a further 9% decrease?
Give your answer rounded to 2 DP.
Answer: $863.95 I do believe
Step-by-step explanation:
can someone please go on my account and help me with my questions I've asked?
Answer:
sure,ill tryy :)
Find the slope of the line that passes through A(0,−5) and B(3,−4)
Answer:
1/3
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-4-(-5))/(3-0)
m=(-4+5)/3
m=1/3
Bella grew 3/4 An inch last year then grew 7/10 of an inch how much inches did Bella grow more than Ben
Trig function - find the exact value
Answer:
3/5
Step-by-step explanation:
We can find ∅ by using the tangent function since we have the opposite and adjacent sides of ∅.
tan(∅)=1/2
tan^-1(tan(∅))=tan^-1(1/2)
∅=26.57
Since we are looking for cos(2∅), then we have cos(2(26.57))=cos(53.14)≈0.6
So the exact value is 3/5
9. DOG WALKING Evan, a dog walker, charges $3 every block that he walks a dog. He also charges a $5 pick up fee when he comes to get a dog. How many blocks will he need to walk a dog in order to earn $26? Write an equation and solve the equation.
Answer:
Evan will have to walk 7 blocks
Step-by-step explanation:
Evan will have to walk 7 blocks because he gets $5 from picking up the dog, so subtract 5 from 26 to get 21. Next, you want to divide 21 by 3 to get 7 because $3 a block and you need to find how many blocks he needs to do.
Please help, I'm in trouble for not doing my homework, this is missing btw. First correct answer gets brainlist!!!!!
Answer:
I think the answer is A........
Find the value of x
I need it fastttt
Answer:
x = -56
Step-by-step explanation:
x4 on both sides to get rid of the fraction, then +20 on both sides to get rid of -20 on the left side, then you get x = -56