Passband to baseband conversion: Consider the following passband signal,

A fiberglass composite is composed of a matrix of vinyl ester and reinforcing fibers of E-glass. The volume fraction of E-glass

masha68 [24]

Full Question

Calculate the modulus of elasticity of the composite

I. In the longitudinal direction of the glass fibre

2. In the perpendicular direction of glass fibre

Answer:

1. 27.5876 GPa

2. 5.725 GPa

Explanation:

Given

Dimensions of the fibreglass is given by: 1.00 cm x 25.00 cm x 200.00 cm

Volume = 1 * 25 * 200 = 5000cm³

P1 = The volume fraction of the E-glass is 31%

P2 = The remainder 69% is Vinyl Ester

Volume of Vinyl Ester= 69% * 5000cm³ = 3450cm³

I. In the longitudinal direction of the glass fibre

Where

Modulus of elasticity of glass, E1 = 80 Gpa

Modulus of elasticity of vinyl ester, E2 = 4.04 Gpa

Modulus of elasticity = E1P1 + E2P2

Modulus of elasticity of vinyl esters = 31% * 80 + 69% * 4.04

Modulus = 24.8 + 2.7876

Modulus = 27.5876 GPa

ii. In the perpendicular direction of glass fibre

This is solved by

E1.E2/(P1.E2 + P2.E1)

= (80 * 4.04)/(31% * 4.04 + 69% * 80)

= 323.2/(1.2524 + 55.2)

= 5.725177317527687

= 5.725 GPa

7 0

3 years ago

A transmission line has a velocity factor of 0.88. You desire to create a quarter-wavelength phasing section at an operating fre

JulsSmile [24]

Answer:

a) λ = 2 meters

b) λ = 1.76 meters

c)In free space: length of phasing section = 0.5 meters and in dielectric medium: length of phasing section =0.44 meter

Explanation:

Given that:

velocity factor = 0.88

operating frequency = 150 MHz = 150 × 10⁶ Hz

phasing section is a quarter-wavelength = λ/4

a) Wavelength of free space:

λ = c/f

where c is the speed of light = 3×10⁸

λ = (3×10⁸)/150 × 10⁶

λ = 2 meters.

b) Wavelength of dielectric:

Velocity of dielectric = speed of light (c) × velocity factor

Velocity of dielectric = 3×10⁸ × 0.88 = 2.64 × 10⁸ m/s

wavelength dielectric = Velocity of dielectric /f = (2.64 × 10⁸)/150 × 10⁶ =1.76

wavelength dielectric = 1.76 meters

c) length of the phasing section in meters:

l = λ/4

In free space:

l = 2/4 = 0.5 meter

In dielectric

l = 1.76/4 = 0.44 meter

7 0

3 years ago

The water jacket is something you put on your engine when it rains?*<br> True<br> Or<br> False?

Tomtit [17]

true

because if rain gets in your engine it could destroy it or you can get electrocuted if you try to touch your engine

4 0

3 years ago

Read 2 more answers

Steel balls 10 mm in diameter are annealed by heating to 1150 k and then slowly cooling to 450 k in an air environment for which

Darina [25.2K]

Answer:

The answer is below

Explanation:

Given that:

ρ = 800 kg/m3, c = 600 J/kg-K, k = 40 W/m-K, Initial temperature = Ti = 1150,

Environment temperature = T = 450 K, Final temperature = T∞ = 325 K

Diameter = 10 mm = 0.01 m, A = 6

The estimated time for cooling process (t) is given as:

$t=\frac{\rho dc}{hA} ln\frac{T_i-T_\infty}{T-T_infty}=\frac{7800*0.01*600}{25*6} ln\frac{1150-325}{450-325}\\ \\t=589\ s\\t=0.1635\ h$

The estimated cooling time is 589 s

4 0

3 years ago

What does pineapple do for my va jay jay

Wewaii [24]

Answer:

Pineapple packs vitamin B, fiber, and a heaping dose of vitamin C, after all. But at the end of the day, maybe it's okay if your va jay jay just smells and tastes… like a va jay jay. Your scent naturally changes a bit throughout your menstrual cycle, but it probably shouldn't ever taste or smell like a tropical fruit.

Explanation:

8 0

3 years ago