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Alexandra [31]
4 years ago
9

Choose all of the statements that are true about electromagnets: 1. Electromagnets are permanent and always have a magnetic fiel

d around them. 2. electromagnets can be made stronger by adding more coils to the solenoid. 3. electromagnets can be made stronger by increasing the strength of the electrical source. 4. none of the above.
Physics
1 answer:
Nitella [24]4 years ago
7 0

Answer:

2. electromagnets can be made stronger by adding more coils to the solenoid.

3. electromagnets can be made stronger by increasing the strength of the electrical source.

Explanation:

Electromagnets are not permanent, they act as magnets when current runs through its coils. They can be stronger by increase the current that goes through the coil surrounding them,. This can be done two ways: 1) increasing the actual current intensity, or 2) increasing the number of coils that wrap around them.

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Physics laws of motion
expeople1 [14]

The acceleration is 0.095 m/s^2

Explanation:

We can solve the problem by applying Newton's second law of motion: in fact, the net force acting on an object is equal to the product between the mass of the object and its acceleration. Therefore we can write:

\sum F = ma

where:

\sum F is the resultant force acting on the object

m is its mass

a is its acceleration

In this problem, we have the following forces acting on the system:

F_1 = 2500 N (forward)

F_2 = -2400 N (backward)

So, Newton's second law can be rewritten as:

F_1 -F_2 = ma

where:

m = 1050 kg is the mass of all the students

Solving the formula for a, we find the acceleration of the system:

a=\frac{F_1-F_2}{m}=\frac{2500+(-2400)}{1050}=0.095 m/s^2

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

8 0
3 years ago
Rly need help with physics
Elis [28]

Answer:

10ms/s²

Answer

Explanation:

pls mark me as brainliest

5 0
3 years ago
Read 2 more answers
Please do this . will mark as brainlest;)
Vika [28.1K]

Answer:

no, not all three contains iron

no, not all three also contain magnets

Explanation:

a has the magnet

b and c have pieces of iron

4 0
3 years ago
The literary movement with which Wilde is most closely associated is Select one: a. romanticism b. existentialism c. Art for art
jeyben [28]

Answer:

Correct answer is ''c'' Art for art's Sake

Explanation:

Wilde wrote in the literary movement called Aestheticism during the late nineteenth century. Contrary to popular belief, Wilde did not create the literary movement, but played a role as a leader who promoted the movement. While Wilde was a college student the works of Algernon Charles Swinburne and Edgar Allan Poe influenced his own writing style. Also, the English essayist Walter Pater helped to form Wilde's humanistic aesthetics.

The philosophical foundations of Aestheticism come from Immanuel Kant. He formulated the idea of "art for art's sake". He believed that art was to be enjoyed for its own beauty regardless of social or moral concerns.

6 0
3 years ago
Explain what cause air pressure in your own words. Why do aircraft need pressurized cabins?
Jobisdone [24]
Because the atsmosphere in the sky makes it less gravity so air craft needs these cabins
7 0
3 years ago
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