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3 years ago

Why are electromagnets used in metal scrap yards?

Physics

2 answers:

Andrej [43]3 years ago

8 0

Because the electromagnets can pick up magnetic material and move it around, hope this helps

iragen [17]3 years ago

8 0

Answer:

To separate the magnetic substance from the scrap.

Explanation:

The electromagnets are the magnets which shows magnetic properties when the electric current pass through them.

The magnetic substances are attracted towards the electromagnet from the scrap.

We can increase or decrease the strength of electromagnet by increasing or decreasing the strength of electric current pass through it.

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weight of Ali is 500andN.he is standing on the ground with an area of 0.025 m^2 area .we can find pressure under his feet. what

Inessa05 [86]

Answer:

20000 Pa

Explanation:

Pressure is defined as the force per unit area.

Mathematically : P =F/A where F is force and A is area

Force = 500 N

Area= 0.025 m²

P= 500/0.025

P= 20000 Pa

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2 years ago

A capacitor is to be constructed to have a capacitance of 100uF.The area of the plates is 6.om by 0.030m and the relative permit

lara [203]

Answer:

The answer is below

Explanation:

Given that:

The area of the plates is 6 m by 0.030 m, Therefore the area = 6 m × 0.03 m = 0.18 m²

the relative permittivity of dielectric (εr) is 7.0

Permittivity of free space (εo) = 8.854 × 10^(-12)

capacitance of 100uF

potential difference (V) of 12V

d = separation between plate

The capacitance (C) of a capacitor is given by:

$C=\frac{\epsilon_o \epsilon_r A }{d}\\ 100*10^{-6}=\frac{8.854*10^{-12}*7*0.18}{d}\\ d=\frac{8.854*10^{-12}*7*0.18}{100*10^{-6}}=1.11*10^{-7}\ m$

The electric field between plates is given as:

E = V /d

$E = 12 / 1.11*10^{-7}=10.75*10^7\ V/m$

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3 years ago

An iron ball is dropped at a height of 10 m from the surface of the moon.

galben [10]

Answer:

3.51s

Explanation:

There are many students who can not get answers step by step and on time

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3 years ago

the difference between any two successive numbers always seems to be _ more than the preceding difference

erma4kov [3.2K]

Here's li $^{}$ nk to the answer:

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2 years ago

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Three substances that can make electricity. What are these substance

DaniilM [7]

Answer:

Ionic substances, also known as salts, conduct electricity when dissolved in water or when in the liquid state

Explanation:

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3 years ago