Liquid crystal elastomers 4D printing material achieve their activation due to
a. Light
b. Heat
c. Electrical
d. All of the above

1 Answer

Answer :

Ans:- d. All of the above

Related questions

Description : How do Wire Rope Isolators (WRI) compare to elastomers regarding use over a broad temperature range?

Last Answer : The WRI can be used over a greater temperature range with less change in performance. Proper elastomer selection will make elastomers useful for most applications.

Description : In 4D printing, which one is the fourth dimension? a.Time b.Material c.Sound d.Light

Last Answer : a.Time

Description : What's the purpose of the orange balls attached to (electrical?) wires?

Last Answer : So low flying airplanes can see them ..like for crop dusters

Description : Direct conversion of chemical energy into electrical energy is done in a (A) Magnetohydrodynamic (MHD) generator (B) Fuel cell (C) Fast breeder reactor (D) None of these

Last Answer : (B) Fuel cell

Description : GATE 2020 syllabus electrical engineering

Last Answer : EE: Electrical Engineering Section 1: Engineering Mathematics Linear Algebra: Matrix Algebra, Systems of linear equations, Eigenvalues, Eigenvectors. Calculus: Mean value theorems, Theorems of ... to dc converters, Single phase and three phase inverters, Sinusoidal pulse width modulation.

Description : Write short notes on fire extinguishing methods adopted in electrical engineering. 

Last Answer : Stand 6 to 8 feet away from the fire and follow the four-step PASS procedure. If the fire does not begin to go out immediately, leave the area at once. Always be sure ... fire causing the particles to expand chemically inhibiting combustion and expelling the oxygen thereby smothering the flames. 

Description : Electrical engineering

Last Answer : https://youtu.be/ZKnK7Na2Frw

Description : Electrical Engineering Android APP

Last Answer : Electrical Engineering Useful Android Apps 1. Electrical Engineering https://play.google.com/store/apps/details?id=electrical.electronics.engineering 2. Electrical Engineering Symbols https:/ ... .google.com/store/apps/details?id=electrical.engineering.qanda SHARE THIS USEFUL APPS

Description : 1.Determine the permeability of magnetic material by plotting its BH curve 2. Measure voltage, current and power in 1-phase circuit with resistive load. 3. Measure voltage, current and ... .Make Star and Delta connection in induction motor starters and measure the line and phase values.

Last Answer : Practical no. 6 Aim: Make Star and Delta connection in induction motor starters and measure the line and phase values. Apparatus required:  voltmeter, ammeter, induction motor Circuit diagram ... Result: Hence we have measured the line and phase value of star and delta connection.

Description : Elastomers are (A) Thermosetting material (B) Exemplified by protein derivatives (C) Having high flexural strength (D) Having very high tensile strength and heat resistance

Last Answer : (C) Having high flexural strength

Description : Why is my oven dripping a black liquid?

Last Answer : Hehe. Looking at the residue, it might be plastic melting. It must be something melting…

Description : Compare liquid fuels with solid fuels.

Last Answer : S.N. Solid fuel Liquid fuel  1 Require more space for storage. Require less space for storage. 2 Lower calorific value Higher calorific value 3 Difficult control ... ash produced 5 deterioration of the oil in storage Non-deterioration of the oil in storage

Description : Benefits of Waste Heat Recovery a. Reduction in pollution b. Reduction in equipment sizes c. Reduction in auxiliary energy consumption d. All of the above

Last Answer : Ans:- d. All of the above

Description : Describe the different modes of heat transfer.

Last Answer : Mode of heat transfer:- 1) Conduction 2) Convection 3) Radiation 1) Conduction- It is the mode of heat transfer from one part of substance to another part of same substance or one ... in the form of electromagnetic waves. Example: The heat energy receives from sun to the earth surface. 

Description : Define sensible heat and latent heat 

Last Answer : Latent heat: It is defined as the quantity of heat required for phase change of working substance at saturation temperature. OR The amount of heat added at saturation temperature is called latent ... thermometer. OR The amount of heat added up to saturation temperature is called sensible heat.

Description : (3) reflection of light due to the presence of free electrons Explanation: Lustre (or luster) is the way light interacts with the surface of a crystal, rock, or mineral. The word ... conductivity, and high density. Typically they are malleable and ductile, deforming -under stress without cleaving.

Last Answer : Cloud is a colloidal dispersion of – (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air

Description : Elastomers are:** A. Hydrophilic B. Hydrophobic C. Water-loving impression material D. Potassium alginates E. None of the above

Last Answer : B. Hydrophobic

Description : What are communication principles? Explain their meaning.

Last Answer : Principle 1. Listen. Try to focus on the speaker's words, rather than formulating your response to those words. Ask for clarification if something is unclear, but avoid constant interruptions. Never ... well, all parties have a common goal. Still, negotiation will demand compromise from all parties.

Description : Please ripley me due to emergency

Last Answer : To calculate the flux density in the ring, you need to use the following formula: B = (μ * I * N) / (2 * π * r) where: B is the flux density in the ring (in teslas) μ is the relative permeability ... 2 * π * 0.127 m) = 0.53 T So the flux density in the ring would be approximately 0.53 teslas.

Description : Is not asked

Last Answer : In manual feed turning, the operator manually controls the feed rate of the cutting tool by turning a handwheel or other manual feed mechanism. This allows the operator to adjust the feed rate ... hand, is generally faster and more consistent, but it requires more complex equipment and programming.

Description : Can a Schizophrenic study Engineering?

Last Answer : You can ask the university’s disability counselor. You might get an accommodation as a special student or take fewer classes, and go part time. Congratulations on improving your situation.

Description : Mechanical engineers: how should one think about using an electric motor actuator vs a hydraulic actuator powered by an electric pump?

Last Answer : Too much wear on gears (and they would have to be huge), much more power advantage with hydraulics. Less parts. And more cost effective. And take up less space.

Description : How long is the longest rope ever manufactured?

Description : Is it clear what a flying car is from the images in the following page?

Last Answer : Yeah. Why? And, I don’t know. If you’ve seen the ‘Blade Runner’, and some other science fictions series and films, it just looks neat. But I doubt we’ll have much of those things until the relatively distant future… if then.

Description : Does anyone have advice about building a new pole barn on my property?

Last Answer : So you intend to keep the current concrete floor?

Description : Do the new digital thermometers stay in your mouth when you use them?

Last Answer : They pop out of my mouth too. Yes, they need redesigned. I went back to the old fashion thermometers with mercury.

Description : Which College is best for Marine Engineering?

Last Answer : The Merchant Marine Academy

Description : Why is engineering so hard to get into?

Last Answer : Because even top students flunk out. If you don’t have “the knack” and good academic discipline then understanding the core curriculum simply will not happen. It’s no picnic, it’s more like the revenant.

Description : Where do you find buildings that are both earthquake proof as well as flood proof?

Last Answer : California.

Description : Fluther engineers, can you reproduce the technology in an food assembly line?

Last Answer : answer:If the world collapses there will be bigger problems than restoring food processing and packaging on assembly lines. One of the bigger problems will be finding people willing to raise food crops ... not going to be one of the first industries to re-emerge from a collapse of civilization.

Description : What is computer engineering like when compared to working at McDonalds?

Last Answer : answer:McDonalds you just take shit from your boss, and from customers while working a shit wage. My buddy describes his engineering job like hanging out in the college library working out a problem. ... those who feel their skills makes them a better human being/deserving of a higher wage.

Description : What types of non-physics/math based engineers are there?

Last Answer : Choo-choo train. You get to choose your scale rather than your degree.

Description : How can I introduce teaching code to my soon to be 2 year old son?

Last Answer : Building with blocks, making mud pies, playing with Thomas the Tank Engine and making the tracks fit. Don’t worry about specific skill preparation; all creative play is good. Your son might decide he wants to be a ballerina!

Description : What is the max square feet or cubic feet for residential air conditioners?

Last Answer : JLeslie This Link seems to keep is simple and I like that it is tabled by temp zones.

Description : What calculator do engineers use?

Last Answer : pen and paper, yeaaaaaah

Description : Why do many people hate on excellence and claim that, without exception, the elevated cost is created artificially for vanity alone?

Last Answer : answer:Do they? Is this a thing? I could take a stab at this, but it would be from a different angle. Some people might see a $1.5M price tag and chuckle - not because they don't think ... data. Instead, it's shit animated graphics and designed for people who apparently do not care about the data.

Description : Calling all engineers! Would it be possible to make a continuous, running loop out of my stream?

Last Answer : Call a pond or water feature pump company. Yes it is possible and could be done with simple switches and floats in the pond. The overflow would be a high level drain (top of water) and pump would shut off on high water. Some ponds at town and large public gardens are set-up that way.

Description : How do you integrate (x-x^2)e^x?

Last Answer : answer:Yep, you'll need integration by parts! Two rounds of it. Lucky you :P Start by choosing one term to be u and one term to be dv. You'll have to take the derivative of u and integrate dv. The important thing is to always choose ... xe^x - x^2e^x - e^x + 2xe^x - 2e^x -x^2e^x + 3xe^x -3e^x Done!

Description : Could someone give a simple high level explanation of what is meant by AM and FM?

Last Answer : Well, have a look at this picture

Description : I need a career change. I really enjoy math. Should I consider engineering?

Last Answer : answer:While math is a big part of engineering, design and insight are a big part of it. Do you have interest in designing things? And what kind of engineering are you thinking of? Civil, ... to keep asking questions and not giving you answers, but these are things you need to think through.

Description : Are all GMO plants bad?

Last Answer : The problem is that No long term studies have been done on how Genetically Altered food will affect us. Our Metabolism slows down to process unknown substances. This promotes a Metabolic Disturbance which can ... contains unnatural substances. You can find more on droz.com and Dr Mark Hyman's site.

Description : How to measure volume flow rate?

Last Answer : answer:If it Classified as Confined Space you should a have it marked as such. You need to review OSHA requirements. You cannot prove natural ventilation when it is a confined space . Positive ... company that had three near misses in confined spaces. Dead people don't go home at night!

Description : How is water vapor getting into this process plumbing?

Last Answer : answer:May not be an answer, but 10 psi is less than ambient. Was the leak test for a vacuum or for positive pressure? If it is a vacuum leak it would bring in moisture.

Description : What is biomedical engineering?

Last Answer : answer:Plenty of jobs, yes. Take a look at this and all the subfields: http://en.wikipedia.org/wiki/Bioengineering Bioprocess Engineering: Bioprocess Design, Biocatalysis, Bioseparation, Bioinformatics ... favorite is this http://en.wikipedia.org/wiki/Bioinformatics Google pours millions into this.

Description : Can you help me engineer this leak detection system for organic solvents?

Last Answer : answer:I'm sorry that I may not be qualified to answer this question, but these are my ideas. If argon is what will be leaking, you could have some sort of argon detector, and some sort of ... when there are no leaks. Any drop in pressure would signal a leak. Look up pressure decay leak detection.

Description : My husband is an engineer and looking to switch careers. Does anyone have any suggestions?

Last Answer : Actuary requires a certificate after completing several exams. Explanation

Description : Building with bamboo?

Last Answer : First of, i never worked with bamboo. But i think i would screws over nails, because i fear that bamboo shoots might split quite easily when hammering nails into it. When using screws you can drill holes before you put them in to avoid splitting.

Description : Can somebody recommend any good book on steel structure fabrication?

Last Answer : Bf is a structural engineer. What type of structures are you interested in and are you looking for info re: bolted or welded? You might try asking on forums like eng-tips.com (think that’s the right URL, might have ta Google) or http://cr4.globalspec.com also.

Description : What are the benefits of buying a 3D CAD tool like SolidWorks ?

Last Answer : It makes creating technical drawings a lot easier and a lot more accurate than if you were to do it by hand. Solidworks probably has a trial version, so you might want to try it out for yourself to see what the benefits are.

Description : How do I go about getting an engineering internship in Tokyo?

Last Answer : The best place to start when looking for employment or an internship is your own network of family, friends, etc. Think through your connections-there might be someone therein who works in the ... often than not, this will lead you to that perfect summer engineering internship. Best of luck!