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DerKrebs [107]
3 years ago
10

What is an advantage of using an electromagnet rather than a regular magnet

Physics
2 answers:
Lena [83]3 years ago
5 0
Electromagnet would have a stronger pull than a regular magnet
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SVEN [57.7K]3 years ago
4 0

Answer:

Electromagnets are temporary magnets made by supplying electric current to a soft iron wounded with coils of wire. Once the source of electricity is disconnected, the magnetism dies off.

However electromagnets usually have stronger electric fields than regular magnets, therefore they are often used in lifting large piece of equipment from one point to another, provided that the equipment are magnetic in nature.

Another major advantage of using an electromagnet rather than a regular magnet is that the magnetism of the electromagnet can be terminated when need be by simply disconnecting the source of electricity.

For example in lifting a heavy metal from one point to another if it gets to the point of dropping off the metal there will be a need to terminate the magnetism so that the metal can fall off; a regular magnet can not be used for this purpose.

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The leaves of a tree lose water to the atmosphere via the process of transpiration. A particular tree loses water at the rate of
Gnoma [55]

Answer:

The speed of the sap flowing in the vessel is 1.90 mm/s

Explanation:

Given:

The rate of water loss, Q = 3 × 10 ⁻⁸ m³/s

Number of vessels contained, n = 2000

Diameter of the vessel, D = 100 Mu m

thus, the radius of the vessel, r = 50 × 10⁻⁶ m

Now, the rate of flow is given as:

Q = AV    .............(1)

where, A is the area of the cross-section

V is the velocity

Total area, A = n × (πr²)

substituting the values in the equation (1), we get

3 × 10 ⁻⁸ m³/s = [2000 × (π × (50 × 10⁻⁶)²)] × V

or

V = 1.909 × 10⁻³ m/s or 1.90 mm/s

Hence, the speed of the sap flowing in the vessel is 1.90 mm/s

7 0
3 years ago
A student witnesses a flash of lightning and then t=2.5s later the student hears assiciated clap of thunder. (please show work)
frosja888 [35]

Answer:

857.5 m

2.8583×10⁻⁶ seconds

Explanation:

Time taken by the sound of the thunder to reach the student = 2.5 s

Speed of sound in air is 343 m/s

Speed of light is 3×10⁸ m/s

Distance travelled by the sound = Time taken by the sound × Speed of sound in air

⇒Distance travelled by the sound = 2.5×343 = 857.5 m

⇒Distance travelled by the sound = 857.5 m

Time taken by light = Distance the light travelled / Speed of light

\text{Time taken by light}=\frac{857.5}{3\times 10^8}\\\Rightarrow  \text{Time taken by light}=2.8583\times 10^{-6}

Time taken by light = 2.8583×10⁻⁶ seconds

3 0
3 years ago
Which of these is NOT an effect of humor?
IgorLugansk [536]
Feelings of jealousy and envy
7 0
3 years ago
Place the items in order from MOST gravitational force (1) to LEAST gravitational force (5).
oksano4ka [1.4K]

Answer:

Explanation:

Sun - - - - - Earth----Capital building----Human----Atom

The sun would exert more gravitational force because it is the massive.

Gravitational force is directly proportional to mass.

5 0
3 years ago
Action-reaction forces do not cancel each other because the action force is always greater than the reaction force
mestny [16]
True hopefully that worked
3 0
3 years ago
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