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Answer: Railroad engineering ideas

Answer:

The current needed is 2387.32 A

Explanation:

Given;

strength of the magnetic field, B = 1.5 T

length of the solenoid, L = 18 m

diameter of the solenoid, D = 75 cm = 0.75 m

diameter of the superconducting wire, d = 2 mm = 0.002 m

The number of turns of the solenoid is calculated as;

[tex]N = \frac{length \ of \ solenoid}{diameter \ of \ wire } = \frac{1.8}{0.002} = 900 \ turns[/tex]

The magnetic field strength is given by;

[tex]B = \frac{\mu_0 NI}{L} \\\\[/tex]

Where;

I is the current needed

μ₀ is permeability of free space = 4π x 10⁻⁷ T.m/A

[tex]I = \frac{BL}{\mu_0 N} =\frac{1.5 \times 1.8}{4\pi \times 10^{-7} \ \times 900} \\\\I = 2387.32 \ A[/tex]

Therefore, the current needed is 2387.32 A

Answer:

Amphere's law state that the sum of over element of the component of magnetic field along the direction of the element, times the element length,is proportional to the current that passes through the loop:This is the general statement of Amphere's law.

Answer:

USA

NAMELY UNITED STATES OF AMERICA

america

Explanation:

because why not

Answer:10.03

Explanation:acellus

Answer:

C

Explanation:

Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes, and 4 seconds with respect to other, distant, stars. Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation.

Answer: the answer is b.

ps: the other answer is wrong, the earth rotates around the sun, and the sun doesn't rotate around the earth.

Explanation:

Answer:

56.25 watts

Explanation:

P = F * d / t

P = Power (it's an unknown at this point).

F = 450 N

d = 25 steps each 10 cm = 25 steps 0.1 m/step = 2.5 m

t = 20 s

Solution

P = 450 * 2.5 / 20

P = 1125/20

P = 56.25

Answer:

The time period of the empty car will be "1.00 s".

Explanation:

The given values in the question will be:

Mass,

m = 250 kg

Loaded car's time period will be:

T = 1.08 s

Shock absorbers compression,

x = 4 cm

or,

  = 0.04 m

Now,

Weight of passengers will be:

⇒  [tex]F=mg[/tex]

         [tex]=250\times 9.8[/tex]

         [tex]=2450 \ N[/tex]

The spring constant of shock absorbers will be:

⇒  [tex]k=\frac{F}{x}[/tex]

        [tex]=\frac{2450}{0.04}[/tex]

        [tex]=61.250 \ N/m[/tex]

As we know,

Time period, [tex]T = 2 \pi\sqrt{\frac{M}{k} }[/tex]

On substituting the values, we get

                   [tex]1.08=2\pi \sqrt{\frac{M}{61250} }[/tex]

                  [tex]\frac{M}{61250}=0.02955[/tex]

                      [tex]M=0.02955\times 61250[/tex]

                           [tex]=1809.6 \ kg[/tex] (Total mass of car as well as its passengers)

Now,

The mass of the empty car will be:

⇒  [tex]m'=M-m[/tex]

          [tex]=1809.6-250[/tex]

          [tex]=1559.6 \ kg[/tex]

hence,

The time period of empty car will be:

⇒  [tex]T'=2\pi\sqrt{\frac{m'}{k} }[/tex]

         [tex]=2\pi\sqrt{\frac{1559.6}{61250} }[/tex]

         [tex]=2\pi \sqrt{0.0254}[/tex]

         [tex]=1.003 \ s[/tex]

or,

         [tex]=1.00 \ s[/tex]

Answer:

a. 0.2 A

Explanation:

Given;

voltage of the battery, V = 12 V

three resistance connected in series, R₁ = 15 Ω, R₂ = 21 Ω,   R₃ = 24Ω

The equivalent resistance for series connection is calculated as;

Rt = R₁ + R₂ +  R₃

Rt = 15Ω  +  21Ω   +   24Ω

Rt = 60 Ω

Apply Ohm's law to calculate the current n the circuit;

V = IRt

I = V/Rt

I = 12/60

I = 0.2 A

Therefore, the current in the circuit is 0.2 A

Answer:

blanket:thermal conductivity

as it conduct heat.

aquarium glass:transparency

as light can be transfered from one side to

another.

Answer: 0.28 A

Explanation:

Answer:

.28

Explanation:

Acellus

Answer:

4kg

Explanation:

=2/2

m=(200x2)/10^2

m=400/100

m=4

4kg

Answer:

 Mg- 27   means isotope with 12 protons and 15 neutrons.

Also 27 is mass number which express sum of protons and neutrons.

In nucleus one neutrn decays to electron and proton. Mass number remain same but Al-27 nucleus contain 13 protons and 14 neutrons. Electron is ejected out from nucleus.

Answer : The momentum of ball is, 15 kg.m/s

Explanation :

Momentum : It is defined as the motion of a moving body. Or it is defined as the product of mass of velocity of an object.

Formula of momentum is:

where,  

p = momentum  = ?

m = mass  = 1.5 kg

v = velocity = 10 m/s

Now put all the given values in the above formula, we get:

Therefore, the momentum of ball is 15 kg.m/s

Answer:

We can say that when we multiply both the force given by the two body and along with the distinct lengths they are situated from centre of mass (fulcrum) will be the same

So the let the distance seperated from the centre of mass on the right side where the boy sits be x

so 60×3 = 45x

=> x = (180/45)

=> x = 4 metres

Hope it helps

Answer:

The average speed is the distance travelled divided by the time taken: Average speed=Distance travelledTime taken.

Answer:

F= 4.3N

the question (for seo and search engine optimization to get this question to the top)

Calculate the force of gravity on the 1-kg mass if it were 3.2×106m above Earth's surface (that is, if it were one and a half Earth radii from Earth's center).

F= 4.3N

Answer:

Recuerda que la Ley de gravitación universal de Newton puede enunciarse así: “Toda partícula de

materia en el universo atrae a todas las demás partículas con una fuerza que es directamente

proporcional a las masas de las partículas e inversamente proporcional al cuadrado de la distancia que

las separa”. Ley que se puede expresar simbólicamente de la siguiente forma:

2

1 2

d

m m F ⋅ ∝

Podemos expresar la proporcionalidad de la ley de gravitación universal en forma de una ecuación

exacta introduciendo la constante de proporcionalidad G, llamada constante de gravitación universal:

2

1 2

d

m m F G ⋅ = ⋅ donde

2

Answer:

i'd say 2

Explanation:

Answer:

[tex]distance = 16 + 12 \\ = 28 \: meters \\ \\ displacement = {}^{ + } 12 + {}^{ - } 16 \\ = - 4 \: meters \\ magnitude = > |s| = 4 \: meters[/tex]

Answer:

frequency

Explanation:

The frequency must also be higher in this sound than in the bell because for high pitch the frequency must be high.

It is defined as the number of waves that crosses a fixed point in one second, known as frequency. The unit of frequency is per second.

We have:

A sound has a higher pitch than a bell.

As we know, the sound has a high pitch if the vibration frequency is high, and a low pitch if the vibration frequency is low.

Thus, the frequency must also be higher in this sound than in the bell because for high pitch the frequency must be high.

Learn more about the frequency here:

brainly.com/question/27063800

#SPJ2

Answer:

[tex]3.5\:\mathrm{m/s^2}[/tex]

Explanation:

Newton's 2nd law is given as [tex]\Sigma F = ma[/tex].

To find the acceleration in the horizontal direction, you need the horizontal component of the force being applied.

Using trigonometry to find the horizontal component of the force:

[tex]\cos 45^{\circ}=\frac{x}{5},\\\frac{\sqrt{2}}{{2}}=\frac{x}{5},\\x=\frac{5\sqrt{2}}{2}[/tex]

Use this horizontal component of the force to solve for for the acceleration of the object:

[tex]\frac{5\sqrt{2}}{2}=1.0\cdot a,\\a=\frac{5\sqrt{2}}{2}\approx \boxed{3.5\:\mathrm{m/s^2}}[/tex]

Answer:

28.1 degrees

Explanation:

Use formula: [tex]N_1Sin(Angle_1) = N_2Sin(Angle_2)[/tex]

* use angles given

Answer:

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work). The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent.

Answer:

Explanation:

The wave of light is being reflected two times while going from lower to higher refractive index mediums

So there will be phase reversal two times .

Condition of destructive index

2 μ t = ( 2m+1) λ / 2

Substituting the values

2 x 1.25 x t = ( 2 x 3 + 1 ) x 600nm / 2

2.5 t = 2100 nm

t = 840 nm .

Answer:

Electromagnetic waves differ in their wavelengths and frequencies. The higher the frequency of an electromagnetic wave, the greater its energy. The speed of an electromagnetic wave is the product of its wavelength and frequency, so a wave with a shorter wavelength has a higher frequency, and vice versa.

Explanation:

Answer:

Earth btw im 12

Explanation:

Earth is the only known planet to have bodies of liquid water on its surface. Europa is thought to have subsurface liquid water. Scientists hypothesize that Europa's hidden ocean is salty, tidal, and causes its ice surface to move, resulting in large fractures

Answer:

Earth

Explanation:

is the only known planet to have bodies of liquid water on its surface