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2 years ago

How have railways developed to date?

1 answer:

7 0

Railways development is constantly growing as it is changing from diesel or fuel powered railways to electric powered railways.

<h3>How was railways developed?</h3>

The first working railway steam locomotive was known to be created by the United Kingdom in the year 1804 through man known as Richard Trevithick who was a British engineer.

Note therefore that railway is changing from high-pressure steam to electric powered railways.

Learn more about railways from

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A 3-in-thick slab is 10 in wide and 15 ft long. The thickness of the slab is reduced by 20% and width increases by 3% in a hot-r

xxMikexx [17]

Answer: l = 2142.8575 ft

v = 193.99 ft/min.

Explanation:

Given data:

Thickness of the slab = 3in

Length of the slab = 15ft

Width of the slab = 10in

Speed of the slab = 40ft/min

Solution:

a. After three phase

three phase = (0.2)(0.2)(0.2)(3.0)

= 0.024in.

wf = (1.03)(1.03)(1.03)(10.0)

= 10.927 in.

Using constant volume formula

= (3.0)(10.0)(15 x 15) = (0.024)(10.927)Lf

Lf = (3.0)(10.0)(15 x 15)/(0.024)(10.927)

= 6750 /0.2625

= 25714.28in = 2142.8575 ft

vf = (0.2 x 0.2 x 3.0)(1.03 x 1.03 x 10.0)(40)/(0.024)(10.927)

= (0.12)(424.36)/0.2625

= 50.9232/0.2625

= 193.99 ft/min.

4 0

3 years ago

Fire andwater ______(do/does) not agree

Elina [12.6K]

Answer:

Hii Dear !!! 

How are you ....

I hope That you are Fine .....

Explanation:

So the answer is __does_____

3 0

3 years ago

Example for strengthening mechanism in single-phase material A. Dispersion strengthening B. Precipitation hardening C. Fiber str

Lena [83]

Answer:

Example for strengthening mechanism in single-phase material: Strain hardening- D.

3 0

3 years ago

Read 2 more answers

The volume fraction of particles in a WC-particle Cu-matrix CERMET is 0.84 Calculate the minimum expected elastic modulus, in GP

Lynna [10]

Answer:

the minimum expected elastic modulus is 372.27 Gpa

Explanation:

First we put down the data in the given question;

Volume fraction $V_f$ = 0.84

Volume fraction of matrix material $V_m$ = 1 - 0.84 = 0.16

Elastic module of particle $E_f$ = 682 GPa

Elastic module of matrix material $E_m$ = 110 GPa

Now, the minimum expected elastic modulus will be;

$E_{CT$ = ( $E_f$ × $E_m$ ) / ( $E_f$ $V_m$ + $E_m$ $V_f$ )

so we substitute in our values

$E_{CT$ = (682 × 110 ) / ( [ 682 × 0.16 ] + [ 110 × 0.84] )

$E_{CT$ = ( 75,020 ) / ( 109.12 + 92.4 )

$E_{CT$ = 75,020 / 201.52

$E_{CT$ = 372.27 Gpa

Therefore, the minimum expected elastic modulus is 372.27 Gpa

7 0

3 years ago

Describe the relationships between load, shear force, and bending moment.

Tatiana [17]

Answer:

the relation between load , shear force and bending moment is

shear force in a beam is calculated by the differentiation of the loading with respect to distance or length of the beam

$V = \dfrac{dw}{dx}$

Bending moment in a beam is define as the change of shear force diagram with respect to the length of the beam.

$M = \dfrac{dV}{dx}$

and where as $M = \dfrac{d^2w}{dx^2}$

where V is the shear force , x is the distance in the beam , M is the bending moment and w is the loading on the beam.

6 0

4 years ago