How do electromagnets differ from regular magnets?

Mathematics

2 answers:

Ira Lisetskai [31]3 years ago

6 0

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:

WARRIOR [948]3 years ago

4 0

Answer:

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:

Hopes this helps and sorry if incorrect

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Suppose <br> g(x) = x^2f(x)<br> and it is known that f(3) = 5 and f '(3) = −2. Evaluate g'(3).

vlabodo [156]

g'(x)=(x^2)'(f(x))+(f'(x))(x^2)

g'(x)=(2x)(f(x))+(f'(x))(x^2)

for g'(3)

g'(3)=(2(3))(f(3))+(f'(3))(3^2)

g'(3)=(6)(5)+(-2)(9)

g'(3)=30-18

g'(3)=12

7 0

4 years ago

What is the area of this figure?

Gemiola [76]

Answer:

107 square millimeters

Step-by-step explanation:

You can make this problem easier by splitting this into pieces you already know how to solve. So, you can draw a line down the middle to get 2 rectangles whose formula are Length X Width. Now, use the side lengths 5x7=35 and 8x9=72.

Add the 2 area of rectangles together to get 107 which is your total area.