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3 years ago

Which statement describes the relay between minerals and rocks ?

Engineering

1 answer:

belka [17]3 years ago

6 0

Answer:

Explanation:

Minerals and rocks are the same. Aggregates of minerals form rocks. Minerals determine the texture of a rock. Most rocks are made of a single mineral type.

<h3>☆♡hope this helps♡☆</h3>

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An ideal substance obeys the relation pV=100 where V is in ft^3 and p is in Psia. Evaluate the reversible non- flow work done on

sweet-ann [11.9K]

Answer:

$W=-230.25\ psia.ft^3$

Explanation:

Given that

p V = 100

This is the isothermal process.

We know that non-flow work given as

$W=\int pdV$

$p_1=10\ psia$

$p_2=100\ psia$

We know that work for isothermal process

$W=P_1V_1\ln \dfrac{P_1}{P_2}$

For isothermal process $P_1V_1=P_2V_2=C$

Here C= 100

$W=P_1V_1\ln \dfrac{P_1}{P_2}$

$W=100\ln \dfrac{10}{100}$

$W=-230.25\ psia.ft^3$

Negative sign indicates that work in done on the system.

7 0

3 years ago

Calculate the modulus of elasticity of carbon-epoxy composite under isostraincondition if thecomposite consists of 40% carbon fi

Artyom0805 [142]

Answer:

1. 142.1 GPa

2. 98.52%

Explanation:

1. The modulus of elasticity of carbon-epoxy composite is calculated using the following formula:

Ec = VmEm + VfEf

where Vm: volume of Epoxy

Em: modulus of the elasticity of the epoxy

Vf: volume of carbon fiber

Ef: modulus of the elasticity of the carbon fiber

Given that :

Vm = 0.6

Em = 3.5 GPa

Vf = 0.4

Ef: 350 Gpa

Therefore Ec = (0.6 × 3.5 GPa + (0.4 × 350 GPa)

Ec = 142.1 GPa

The modulus of elasticity of carbon-epoxy composite is 142.1 GPa

2. Percentage of load carried by the carbon fibers is given by the following equation: Ff/Fc = (Ef/Ec)×Vf

where Ff is the force carried by carbon fibers, Fc is the force applied to the composite, Ec is the modulus of elasticity of the composite, Ef is the modulus of the elasticity of the carbon fiber and Vf the volume of carbon fiber.

Given that:

EF = 350 Gpa

Ec = 142.1 GPa

Vf = 0.4

Substituting the above values into the equation:

Ff/Fc = (350 GPa/142.1 GPa)×0.4 = 0.9852 = 98.52%

The percentage of load carried by the carbon fibers is there 98.52%

8 0

3 years ago

An architect position requires an internship or residency true or false

Helga [31]

False

Explanation:

Residency is a term in medicine that means a three plus training program in medical specialty. An architect is a program in the engineering field that requires an internship after graduation to equip a graduate architect with field experience that involve working close with experienced professionals in the same field. During this 12 month internship period, a graduate is trained on how to perform the real job through exposure to projects in that field.

Learn More

Residency in medicine :brainly.com/question/13357986

Keywords : architect, internship, residency

#LearnwithBrainly

4 0

3 years ago

F a black car and a white car are left in the Sun, the black car will tend to be hotter. This is because the black car's surface

AysviL [449]

Answer:

Absorb

Explanation:

Compared to a white car, a black car is a black object that absorbs light and all colors without reflecting any compared to white. When black objects absorbs all the energy from colors around them they would then become hot, the objects would then release some of this heat energy into the air. So in a nutshell, the black car absorbs all the light that would hit it and then it would convert it to heat

3 0

3 years ago

Read 2 more answers

A steam reformer operating at 650C and 1 atm uses propane as fuel for hydrogen production. At the given operating conditions, th

dusya [7]

Answer:

Explanation:

a) for shifting reactions,

Kps = ph2 pco2/pcoph20

=[h2] [co2]/[co] [h2o]

h2 + co2 + h2O + co + c3H8 = 1

it implies that

H2 + 0.09 + H2O + 0.08 + 0.05 = 1

solving the system of equation yields

H2 = 0.5308,

H2O = 0.2942

B) according to Le chatelain's principle for a slightly exothermic reaction, an increase in temperature favors the reverse reaction producing less hydrogen. As a result, concentration of hydrogen in the reformation decreases with an increasing temperature.

c) to calculate the maximum hydrogen yield , both reaction must be complete

C3H8 + 3H2O ⇒ 3CO + 7H2( REFORMING)

CO + H2O ⇒ CO2 + H2 ( SHIFTING)

C3H8 + 6H2O ⇒ 3CO2 + 10 H2 ( OVER ALL)

SO,

Maximum hydrogen yield

= 10mol h2/3 molco2 + 10molh2

= 0.77

⇒ 77%

3 0

3 years ago