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3 years ago

What would we need to do to make an electromagnet strong enough to move cars and trains

Physics

1 answer:

SVEN [57.7K]3 years ago

5 0

Answer:

The combined magnetic force of the magnetized wire coil and iron bar makes an electromagnet very strong. In fact, electromagnets are the strongest magnets made. An electromagnet is stronger if there are more turns in the coil of wire or there is more current flowing through it.

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Identify the element X in the following nuclear reactions: (a) H+Be → X + n; (Hint: See Appendix E.)

nikklg [1K]

Answer:

Boron

Explanation:

(a)

H means hydrogen

The atomic mass of hydrogen is 1 and the mass number is 2.

Be means beryllium

The atomic number is 4 and the mass number is 9.

n mean neutron, atomic number is 0 and mass number 1.

By conserving the charge,

the atomic number of X = 1 + 4 - 0 = 5

the mass of X = 2 + 9 - 1 = 10

The element having atomic number 5 and mass number 10 is Boron (B).

5 0

3 years ago

) A physics student wants to measure the stiffness of a spring (force required per cm stretched). He knows that according to Hoo

Maurinko [17]

Answer:

Explanation:

find the solution below

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4 years ago

What happens to the temperature of a substance during a phase change?

german

During a phase change, the temperature remains constant. obviously all the heat is used in phase transformation.

8 0

3 years ago

Jfdojbfkkjds vdf;ifdfdi

Oliga [24]

Answer:

hsjishhdhjs jdjyshskksndhu

6 0

3 years ago

A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surfac

azamat

Answer:

a. Speed = 1.6 m/s

b. Amplitude = 0.3 m

c. Speed = 1.6 m/s

Amplitude = 0.15 m

Explanation:

The frequency of the wave must be equal to the reciprocal of the time taken by the boat to move from the highest point to the highest point again. This time will be twice the value of the time taken to travel from the highest point to the lowest point:

frequency = $\frac{1}{2(2\ s)}$ = 0.25 Hz

The wavelength of the wave is the distance between consecutive crests of wave. Therefore,

Wavelength = 6.4 m

Now, the speed of the wave is given as:

Speed = (Frequency)(Wavelength)

Speed = (0.25 Hz)(6.4 m)

Speed = 1.6 m/s

Amplitude is the distance between the mean position of the wave and the extreme position. Hence, it will be half the distance between the highest and lowest point:

Amplitude = (0.5)(0.6 m)

Amplitude = 0.3 m

frequency = $\frac{1}{2(2\ s)}$ = 0.25 Hz

Speed = (Frequency)(Wavelength)

Speed = (0.25 Hz)(6.4 m)

Speed = 1.6 m/s

Amplitude = (0.5)(0.3 m)

Amplitude = 0.15 m

8 0

3 years ago