Engineering

6 days ago

A poly(ethylene) is made of the following fractional distribution. Calculate Mn , Mw and PI for ...

A poly(ethylene) is made of the following fractional distribution. Calculate Mn ,
Mw and PI for this polymer.
Wi 0.10 0.20 0.30 0.30 0.10
Mi (kg/mol) 20 40 60 80 100

cloveb 14 1 Reply

6 days ago

Compare and contrast controlled degradation (e.g. as occurs in biodegradable polymers or ceramics) ...

Compare and contrast controlled degradation (e.g. as occurs in biodegradable polymers or ceramics) and corrosion. What are important design parameters associated with each? (5 sentences or less)

cloveb 16 1 Reply

6 days ago

Calculate Miller indices for following planes. For full credit, show the steps used to calculate the

Calculate Miller indices for following planes. For full credit, show the steps used to calculate the indices (see Chapter 2). (Note: x = a axis, y = b axis, z = c axis)

cloveb 13 1 Reply

Hard

6 days ago

For a FCC crystal, show why relation between r and a is a = 2r 2 and then use this to show that the

For a FCC crystal, show why relation between r and a is a = 2r sqet 2 and then use this to show that the APF for FCC crystals is 0.74. (Note error in book: There are the equivalent of 4 atoms/unit cell in a FCC crystal.)

cloveb 15 1 Reply

6 days ago

Would integration be an acceptable biological response? Would formation of a fibrous capsule around ...

Would integration be an acceptable biological response? Would formation of a fibrous capsule around the implant be an acceptable biological response? Why or why not? (6 sentences or less)

cloveb 14 1 Reply

Medium

6 days ago

Name one post-formation processing method that occurs in the fabrication of this type of implant and ...

Name one post-formation processing method that occurs in the fabrication of this type of implant and explain why it is important. (1-2 sentences)

cloveb 16 1 Reply

6 days ago

Which of the 3 major types of biomaterials is commonly used for the stem? Why? (4 sentences or less)

cloveb 13 1 Reply

6 days ago

Estimate the average moisture content in the sample after 8 hours. Plot the moisture content ...

A piece of wood (2.52cm thick) with the edges sealed with a water-proofing cement was dried from both faces in a tunnel dryer using cross-circulation of air. The initial moisture content was 39.7% on the dry basis. No shrinkage occurred during drying

cloveb 26 2 Replies

Hard

6 days ago

An air stream containing 4% ammonia (by volume) is to be introduced to the bottom of a packed ...

An air stream containing 4% ammonia (by volume) is to be introduced to the bottom of a packed column, which is filled with 2-inch ceramic Berl saddles, at a molar flux of 20 lbmol/h.ft2. Pure water is fed to the top of the column at 1020 l

cloveb 74 2 Replies

2 months ago

CHE 318 - A granular polymeric material is to be dried by blowing air through the material in a ...

A granular polymeric material is to be dried by blowing air through the material in a fixed bed. The thickness of the bed is 7 cm. the bed porosity is 0.60, and the specific area of the solid particles in the bed is 185 m2/m3. The particle average di

cloveb 45 2 Replies

2 months ago

Sulfur dioxide produced by the combustion of sulfur in air is absorbed in water. Pure SO2 is then ...

Sulfur dioxide produced by the combustion of sulfur in air is absorbed in water. Pure SO2 is then recovered from the solution by steam stripping. Make a preliminary design for the absorption column. The feed will be 5000 kg/hr of gas containing 8 mol

cloveb 36 1 Reply

2 months ago

Normal exhaust back pressure should be 2.5 PSI of more.

True/false

Nerioed 54 1 Reply

2 months ago

The diameter of a cylinder is called the ________.

A) Stroke B) Diameter C) Bore D) Radius

hungvu1997 122 1 Reply

3 months ago

Which of the following is not correct: Ethics is the study of

Which of the following is not correct: Ethics is the study of

a) Good/evil
b) Right/wrong
c) Justice and political ideals
d) Nice/not nice
e) All of the above

cloveb 127 1 Reply

4 months ago

Automotive question on chapter 11 of automotive electrical.

Technician A says that magnetic lines of force can be seen
by placing iron filings on a piece of paper and then holding
them over a magnet. Technician B says that the effects
of magnetic lines of force can be seen using a compass.

riceman1 140 1 Reply

4 months ago

An SOHC V-8 engine has how many camshafts?

A) One B) Three C) Two D) Four

hungvu1997 83 1 Reply

5 months ago

The chemical energy in fuel is converted to heat by the burning of the fuel at a controlled rate. ...

A) Combustion B) Torque C) Power D) Consumption

hungvu1997 58 1 Reply

5 months ago

How many degrees of CAMSHAFT rotation are needed for a piston to travel from TDC to BDC and return ...

A) 90 B) 720 C) 180 D) 360

hungvu1997 64 1 Reply

5 months ago

How many degrees of CAMSHAFT rotation are needed to complete the four stroke combustion cycle?

A) 180 B) 720 C) 90 D) 360

hungvu1997 70 1 Reply

5 months ago

How many degrees of CRANKSHAFT rotation are required for a piston to travel from TDC to BDC and ...

A) 360 B) 90 C) 720 D) 180

hungvu1997 58 1 Reply

5 months ago

How many rotations of the crankshaft are required to complete each stroke of a four-stroke cycle ...

A) One B) One-fourth C) One-half D) Two

hungvu1997 59 1 Reply

5 months ago

The coolant flow through the radiator is controlled by the ________.

A) Thermostat
B) Size of the passages in the block
C) Water pump
D) Cooling Fan(s)

hungvu1997 83 1 Reply

5 months ago

Technician A says that changing connecting rod length changes engine stroke. Technician B says that ...

A) Technician A B) Technician B C) Both technicians D) Neither technician

hungvu1997 89 1 Reply

5 months ago

How many degrees of CRANKSHAFT rotation are needed to complete the four stroke combustion cycle?

A) 180 B) 90 C) 360 D) 720

hungvu1997 61 1 Reply

5 months ago

The ratio of the volume of a cylinder with the piston at BDC to the volume of the cylinder with the ...

A) Volume ratio B) Displacement C) Compression ratio D) None of these

hungvu1997 87 1 Reply

5 months ago

Which part of the four stroke cycle is illustrated in this drawing?

A) Exhaust B) Compression C) Power D) Intake

hungvu1997 55 1 Reply

5 months ago

In this drawing, which item is the camshaft?

A) A B) B C) C D) None of these

hungvu1997 55 1 Reply

5 months ago

Natural red hair consists of two genes. People with red hair have two dominant genes, two regressive ...

Natural red hair consists of two genes. People with red hair have two dominant genes, two regressive genes, or one dominant and one regressive gene. A group of 1000 people was categorized as follows:

&nbs

cloveb 589 1 Reply

Hard

5 months ago

At Pa=0.5, what is the numerical probability of finding one Branch unit connected to another by a ...

A step-growth polymerization is started with the following initial composition:

A3 1 mol
AA 1 mol
B 1 mol
BB 2 mol

At Pa=0.5,

cloveb 131 2 Replies

Hard

5 months ago

A container in the shape of a right circular cylinder with no top has surface area 3 pi ...

A container in the shape of a right circular cylinder with no top has surface area 3 pi ft2. What height h and base radius r will maximize the volume of cylinder? Apply Matlab optimization toolbox.

CHE 425 Process and Eng

cloveb 264 2 Replies

5 months ago

The hoop stress, Qh, at the outer surface of a pipe with internal pressure, P, outside diameter d1, ...

The hoop stress, Qh, at the outer surface of a pipe with internal pressure, P, outside diameter d1, and inside diameter d2 is

Qh=(2Pd22)/(d12-d22)

A well-made PVC pipe has o

cloveb 115 2 Replies

Hard

5 months ago

The stress relaxation behavior of a particular grade of polymer under constant strain is given by ...

The stress relaxation behavior of a particular grade of polymer under constant strain is given by the following expression:

T(t)= Gyoe-t/A + To

Where G is constant, yo is th

cloveb 101 1 Reply

Hard

5 months ago

Describe how TLC could be used to confirm whether a compound was pure or not. Were all of the ...

Describe how TLC could be used to confirm whether a compound was pure or not. Were all of the standard analgesic solutions provided for you in this experiment pure?

cloveb 125 1 Reply

5 months ago

Alculate the fraction of crystallinity of polythylene samples with densities at 20oC of 926, 940 and ...

a) Calculate the fraction of crystallinity of polythylene samples with densities at 20oC of 926, 940 and 955 kg/m3. Take the specific volume of crystalline polyethylene as 0.989 x 10-3 m3/kg and that of amo

cloveb 97 1 Reply

Hard

5 months ago

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within ...

1. A vehicle's oil pressure warning light is on. Technician A says that the pressure-sending unit should be replaced and the vehicle re-checked. Technician B says that a mechanical oil pressure gauge should be used to check the oil pressure befo

gerska 611 1 Reply

akhilkg

6 months ago

Technician A says that most experts recommend replacing all drum brake hardware including the ...

Technician A says that most experts recommend replacing all drum brake hardware including the springs every time the brake linings are replaced. Technician B says that the starwheel adjuster must be cleaned and lubricated to assure proper operation.

Chris70324 166 1 Reply

bpettett28

6 months ago

What is the partition coefficient for 3-nitroaniline between diethyl ether and water (at room ...

Use information available in the Merck Index, and show your calculations to answer the following questions:

a) What is the partition coefficient for 3-nitroaniline between diethyl ether and water (at room temperature and pH > 8)?

cloveb 107 1 Reply