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djyliett [7]
3 years ago
12

How are electromagnets made and how do they work?

Physics
1 answer:
frez [133]3 years ago
8 0
Electromagnets

When an electric current flows in a wire, it creates a magnetic field around the wire. This effect can be used to make an electromagnet. A simple electromagnet comprises a length of wire turned into a coil and connected to a battery or power supply.
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determine the pressure exerted on the surface of a submarine cruising 175 ft below the free surface of the sea. assume that the
Alenkasestr [34]

Answer:

92.81 psia.

Explanation:

The density of water by multiplying its specific gravity by the density of sea water.

SG = density of sea water/density of water

ρ = SG x ρw

1 kg/m3 = 62.4 lbm/ft^3

= 1.03 * 62.4

= 64.27lbm/ft^3.

The absolute pressure at 175 ft below sea level as this is the location of the submarine.

P = Patm +ρgh

= 14.7 + 64.27 * 32.2 * 175

Converting to pound force square inch,

= 14.7 + 64.27 * (32.2ft/s^2) * (175ft) * (1lbf/32.2lbm⋅ft/s^2) * (1ft^2/144in^2 )

= 14.7 + 78.11 psia

= 92.81 psia.

8 0
3 years ago
We have seen that the voltage of a concentration cell can be affected by the concentrations of aqueous components and/or tempera
NemiM [27]

Answer:

1) Magnesium metal/magnesium ion

2) Aluminum/aluminum ion

3)  Copper metal/copper(l) ion

Explanation:

The activity series is a series that shows the ease of reactivity of substances in an electrochemical cell.

The substances that are higher up in the series are more reactive in electrochemical cells.

Magnesium is the first element in the series that has the most negative redox potential  then followed aluminium.

Hence, according to Nernst,

1) Magnesium metal/magnesium ion

2) Aluminum/aluminum ion

3)  Copper metal/copper(l) ion

5 0
3 years ago
Helppppppppppppppppppp
hichkok12 [17]

Answer:

100 million step

Explanation:

wish it will help u

4 0
3 years ago
Please need help with this
PtichkaEL [24]
Through is the answer to your question
3 0
3 years ago
Read 2 more answers
How does friction affect motion? <br> (Please explain in an easy way and no plagiarism please)
frez [133]
Friction causes resistance against a moving object. It can cause an object to slow down, or stop when there’s enough friction…. I hope this helps
5 0
2 years ago
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