Description : If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called (a) free expansion (b) hyperbolic expansion (c) adiabatic expansion (d) parabolic expansion (e) throttling.
Last Answer : Answer : a
Description : Gas is enclosed in a cylinder with a weighted piston as the stop boundary. The gas is heated and expands from a volume of 0.04 m^3 to 0.10 m^3 at a constant pressure of 200kPa.Calculate the work done by the system. A. 8 kJ B. 10 kJ C.12 kJ D.14 kJ Formula: W = p(V2-V1)
Last Answer : 12 kJ
Description : A gas is enclosed in a cylinder with a weighted piston as the top boundary. The gas is heated and expands from a volume of 0.04 m3 to 0.10 m3 at a constant pressure of 200 kPa. Find the work done on the system. a. 5 kJ b. 15 kJ c. 10 kJ d. 12 kJ
Description : A fluid is the one, which (A) Cannot remain at rest under the action of shear force (B) Continuously expands till it fills any container (C) Is incompressible (D) Permanently resists distortion
Last Answer : (A) Cannot remain at rest under the action of shear force
Description : In a turbine, the fluid expands almost (A) Isothermally (B) Isobarically (C) Adiabatically (D) None of these
Last Answer : (C) Adiabatically
Description : Fluid is a substance that (A) Cannot be subjected to shear forces (B) Always expands until it fills any container (C) Has the same shear stress at a point regardless of its motion (D) Cannot remain at rest under action of any shear force
Last Answer : Answer: Option D
Description : Which of the following events is heat exchange involved? a. when there is a phase change b. when there is a chemical reaction c. when the gas expands adiabatically d. when there is difference in temperature
Last Answer : when the gas expands adiabatically
Description : A certain gas, with cp = 0.529Btu/ lb. °Rand R = 96.2ft.lb/lb. °R, expands from 5 cu ft and 80°F to 15 cu ft while the pressure remains constant at 15.5psia. Compute for T2. a.1520°R b. 1620°R c. 1720°R d. 1820°R formula: T2= T1V2/V1
Last Answer : 1620°R
Description : A certain gas with cp = 0.529Btu/lb°R and R = 96.2ft/lbºR expands from 5 ft and 80ºF to 15 ft while the pressure remains constant at 15.5 psia. a. T2=1.620ºR, ∫H = 122.83 Btu b. T2 = 2°R, ∫H = 122.83 Btu c. ... , ∫H = 122.83 Btu d. T2 = 1°R, ∫H = 122.83 Btu T2= V2(t2)/V1 and ∫H = mcp (T2-T1)
Last Answer : T2=1.620ºR, ∫H = 122.83 Btu
Description : A certain gas, with cp = 0.529Btu/lb.°R and R = 96.2 ft.lb/lb.°R, expands from 5 cu ft and 80°F to 15 cu ft while the pressure remains constant at 15.5 psia. Compute for T2. (Formula: T2= T1V2/V1) a. 460°R b. 270°R c. 1620 °R d. None of the above
Last Answer : 1620 °R
Description : When a gas in a vessel expands, its internal energy decreases. The process involved is (A) Reversible (B) Irreversible (C) Isothermal (D) Adiabatic
Last Answer : (A) Reversible
Description : . The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is (A) R loge 4 (B) R log10 4 (C) Cv log10 4 (D) Cv loge 4
Last Answer : (A) R loge 4
Description : A convection process in which an external device, such as a fan, is used to produce the fluid flow. a. Forced Convection b. External Convection c. Placid Convection d. Thermionic Convection
Last Answer : Forced Convection
Description : A process in which heat energy is transferred by the flow of fluid. a. Convection b. Conduction c. Radiation d. Sublimation
Last Answer : Convection
Description : What is defined as a process during which a fluid flows through a control volume steadily? A. Transient-flow process B. Steady and uniform process C. Uniform-flow process D. Steady-flow process
Last Answer : Steady-flow process
Description : Which of the following states that work expands to fill the time available. a) CASE tools b) Pricing to win c) Parkinson’s Law d) Expert judgement
Last Answer : c) Parkinson’s Law
Description : 4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is (A) 4 J (B) ∞ (C) 0 (D) 8 J
Last Answer : (C) 0
Description : A gas performs the maximum work, when it expands (A) Non-uniformly (B) Adiabatically (C) Isobarically (D) Isothermally
Last Answer : (C) Isobarically
Description : An egg sinks in soft water but floats in a concentrated solution of salt because – (1) Egg absorbs salt from the solution and expands (2) Albumin dissolves in salt solution and egg becomes lighter (3) The density of salt solution exceeds the density of eggs (4) Water has high surface tension
Last Answer : (3) The density of salt solution exceeds the density of eggs Explanation: Following the density principle, the density of the egg compared to the density of the tap water is lesser (the density principle ... and that is why an egg sinks in soft water but floats in a concentrated solution of salt.
Description : Which of the following colloids is expensive but rapidly expands plasma volume? a) Albumin Albumin is a colloid that requires human donors, is limited in supply, and can cause congestive heart failure ... , not a colloid. d) Hypertonic Saline Hypertonic saline is a crystalloid, not a colloid.
Last Answer : a) Albumin Albumin is a colloid that requires human donors, is limited in supply, and can cause congestive heart failure.
Description : An egg sinks in soft water but floats in a concentrated solution of salt because (1) egg absorbs salt from the solution and expands (2) albumin dissolves in salt solution and egg becomes lighter (3) the density of salt solution exceeds the density of eggs (4) water has high surface tension
Last Answer : the density of salt solution exceeds the density of eggs
Description : Work done in pushing a fluid across a boundary, Usually into or out of a system a. Flow Work b. Flow Energy c. Both a & b d. None of the above
Last Answer : Both a & b
Description : The theory that heat consisted of a fluid, which could be transferred from one body to another, but not “created” or “destroyed”. a. Clausius Theorem b. Caloric Theory c. Joules Law d. Newton’s Law of cooling
Last Answer : Caloric Theory
Description : Water expands when it freezes. Ice takes up more space than water. Where do I find the formula?
Last Answer : answer:If it’s not homework, use your common sense. Leave an inch or so unfilled. Less is more initially, so freeze the first batch with slightly less than seems safe and observe the results. Remember your experiences with the ice tray and how the cubes expand.
Description : If the universe expands at faster than the speed of light, does it begin to go back in time?
Last Answer : The universe is no longer expanding at faster than the speed of light.
Description : When the sun expands into the Earth and all life ends, what song would you play for the rolling credits?
Last Answer : It's the end of the world as we know it... -REM
Description : Which substance expands the most when applied heat ?
Last Answer : Gaseous substances are most diffused in the application of heat.
Description : That's what I was thinking.
Last Answer : If so, I think the rate of expansion will be constant. Although there is already a theory that the universe is not expanding.
Description : One mole of a gas occupying `3dm^(3)` expands against a constant external pressure of 1 atm to a volume of 13 lit. The workdone is :-
Last Answer : One mole of a gas occupying `3dm^(3)` expands against a constant external pressure of 1 atm to a volume of 13 lit. ... `dm^(3)` D. `-48` atm `dm^(3)`
Description : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N m^(-2)`, then the change in internal energy
Last Answer : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N ... . `-100 J` C. `+100 J` D. None of these
Description : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37.0^(@)C` . As it does so, it absorbs
Last Answer : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37. ... J` D. `q= +208 J, w=+208 J`
Description : Is the universe slowing down as it expands?
Last Answer : No; in fact, the expansion is speeding up.
Description : Why does a partially inflated weather balloon expands as it rises?
Last Answer : As height is gained the outside air pressure on the balloon isreduced. This reduction allows the gas inside the balloon toexpand.
Description : Is it true if you let air out of a bicycle tire the valve becomes cold. This is because when a gas under pressure expands it releases energy to the environment?
Last Answer : Feel Free to Answer
Description : What area around it so has a high concentration of sodium ions are the result the cell membrane expands and burst which problem was the cell most likely having?
Last Answer : What is the answer ?
Description : What Expands the powers of congress?
Description : What is the pressure of the air, in atm, in the lungs when the gas expands to 175.0 mL at a body temperature of 37 ∘C, and the amount of gas remains constant?
Last Answer : I don’t understand the question
Description : When water is filled in a bottle and is allowed to freeze, the bottle breaks because _____? A. Water expands on freezing B. Bottle contracts at freezing point C. Temperature outside the bottle is less than that inside the bottle D. None of them
Last Answer : ANSWER: A
Description : A pyrex tumbler does not crack when hot water is poured into it because pyrex (a) is a strong material (b) does not expand much on heating (c) is a good conductor of heat (d) expands equally from inside and outside
Last Answer : Ans:(b)
Description : Internal economies - (1) arise when there is expansion in an industry. (2) arise in an economy as it makes progress. (3) accrue to a firm when it expands its output. (4) arise when there is expansion in internal trade.
Last Answer : (1) arise when there is expansion in an industry. Explanation: Internal economies are those economies in production-those reductions in production costs-which accrue to the firm itself when it expands its ... of its own expansion independent of the size and expansion of the industry as a whole.
Description : When hot liquid is poured into a thick glass tumbler, it cracks because glass – (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion
Last Answer : (1) is a bad conductor of heat so only inner surface expands Explanation: When hot liquid is poured into a thick glass tumbler, it cracks because glass is a bad conductor of heat so only inner surface expands.
Description : Pipelines in cold countries often burst in winter, because – (1) Water freezes and expands in its volume (2) Temperature of ice is less than that of water (3) Pipelines contract in their volume (4) Pipelines expand due to freezing
Last Answer : (1) Water freezes and expands in its volume Explanation: Water expands on freezing. When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees ... it expands by approximately 9%. The fact that water expands upon freezing causes icebergs to float.
Description : Water pipes in hilly areas often burst on a cold frosty night, because – (1) The material of which pipes are made contracts due to cold and so breaks (2) Water in the pipes freezes and on freezing water expands, so pipes break (3) Frost makes the pipes rusty, so they break (4) None of these
Last Answer : (2) Water in the pipes freezes and on freezing water expands, so pipes break Explanation: The temperature may fall below 0° C during cold frosty nights which converts the water inside the pipes into ice, ... in an increase in volume. This exerts great force on the pipes and as a result, they burst.
Description : A gas thermometer is more sensitive than a liquid thermometer because a gas: (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily
Last Answer : (4) does not change state easily Explanation: Gas is easily compressed so it would have a more versatile range of measurement at least in our atmospheric conditions. Liquid is not so ... apparatus is a constant volume thermometer. Gas thermometers are often used to calibrate other thermometers.
Description : In severe winter, in cold countries water pipes burst because – (1) Water expands on freezing (2) Contraction of water pipes (3) High atmospheric pressure (4) Combined effect of all the above three
Last Answer : (1) Water expands on freezing Explanation: Most liquids have a quite simple behavior when they are cooled (at a fixed pressure): they shrink. The liquid contract as it is cooled; ... substance solidifies, which causes it to contract some more because crystalline solids are usually tightly packed.
Description : When a ring of metal is heated what happens to its hole? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : (1) expands Explanation: The hole size will increase because in expansion the size between two molecules, do not increase so when the molecules on the outer edge move outward. Due to expansion, the ... expansion is the tendency of matter to change in volume in response to a change in temperature.
Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because – (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water
Last Answer : (2) glass suddenly contracts Explanation: If the poured liquid is relatively hotter or colder in comparison to the tumbler, it will break. When hot water is poured into a tumbler there is an uneven increase in the thermal expansion of the walls of the vessel.
Description : Name a liquefied metal which expands on solidification.
Last Answer : Gallium (Ga) is a silvery white metal, liquid at room temp. It expands by 3.1% on solidifica-tion.
Description : When water is filled in a bottle and is allowed to freeze, the bottle breaks because A. Water expands on freezing (Answer) B. Bottle contracts at freezing point C. temperature outside the bottle is less than that inside the bottle. D. None of the above
Last Answer : A. Water expands on freezing (Answer)