What does it mean when they say mass is conserved in a mixture?

What does it mean when they say mass is conserved in a mixture?
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Why do Lee's results indicate that mass was not conserved?

Description : Why do Lee's results indicate that mass was not conserved?

Last Answer : He did not collect the gas and dust released by the burning charcoal.

In nuclear reactions, __________ number is conserved. (A) Mass (B) Atomic (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In nuclear reactions, __________ number is conserved. (A) Mass (B) Atomic (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved: w) the net electric charge x) the total mass-energy y) the number of protons z) the number of nucleons

Description : In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved: w) the net electric charge x) the total mass-energy y) the number of protons z) the number of nucleons

Last Answer : ANSWER: Y -- THE NUMBER OF PROTONS

During SHM which of the following is conserved? a.Kinetic energy b.Potential energy c.Total energy d.Momentum e.All of the above

Description : During SHM which of the following is conserved? a.Kinetic energy b.Potential energy c.Total energy d.Momentum e.All of the above

Last Answer : d. Momentum

The torque acting on a system is zero. Which of the following will be conserved? a.Angular velocity b.Linear momentum c.107 dynes d.Angular momentum e.Moment of inertia

Description : The torque acting on a system is zero. Which of the following will be conserved? a.Angular velocity b.Linear momentum c.107 dynes d.Angular momentum e.Moment of inertia

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State one way by which mineral resources can be conserved. -Geography

Description : State one way by which mineral resources can be conserved. -Geography

Last Answer : Minerals are non -renewable resources and once depleted cannot be replenished for further usage. Thus, it is important that we conserve this so that future generations can also benefit from ... can develop new technology that avoids the wastage of minerals and provides ways for maximum utilization.

Describe how communities have conserved and protected forests and wildlife in India. -SST 10th

Description : Describe how communities have conserved and protected forests and wildlife in India. -SST 10th

Last Answer : (i) In Sariska Tiger Reserve : Rajasthani villagers have fought against mining by citing the Wildlife Protection Act. In many areas, villagers themselves are protecting habitats and ... economic or developmental activities, that are people centric, environment-friendly and economically rewarding.

How can minerals be conserved? -SST 10th

Description : How can minerals be conserved? -SST 10th

Last Answer : .We must make use of minerals in a planned and sustainable manner. .Improved technologies need to be constantly evolved to allow the use of low grade ores at low cost. .Recycling of metals, using scrap metals and other substitutes are steps in conserving mineral resources for the future.

Answer the following questions in about 120 words. Describe how communities have conserved and protected forests and wildlife in India. -SST 10th

Description : Answer the following questions in about 120 words. Describe how communities have conserved and protected forests and wildlife in India. -SST 10th

Last Answer : The forests in India are home to a number of communities. These communities share a complex relationship with the flora and fauna around them. In certain areas, local communities are ... examples to create the involvement of local communities in the management and restoration of degraded forests.

Mention three reasons why forests must be conserved. -SST 10th

Description : Mention three reasons why forests must be conserved. -SST 10th

Last Answer : Forest conservation is needed to prevent soil erosion. Forest conservation helps to save the habitat of the wild animals. It also prevents desertification, flood control, control soil erosion etc.

Describe how communities have conserved and protected forests and wildlife in India? -Geography

Description : Describe how communities have conserved and protected forests and wildlife in India? -Geography

Last Answer : In India many traditional communities still live in the forests and depend on their livelihood for forest produce. These communities are working hand in hand with the government to conserve ... communities in protecting the environment, and stopping degradation of forests has reaped many benefits.

why do you think many mining, logging, and companies opposed conserved?

Description : why do you think many mining, logging, and companies opposed conserved?

Last Answer : cause

Endangered plant species are conserved through

Description : Endangered plant species are conserved through

Last Answer : Endangered plant species are conserved through A. Herbarium B. Gene library C. Gene bank D. Reducing pollution

The method by which endangered plant species are conserved in a botanical garden or in some controlled circumstances-

Description : The method by which endangered plant species are conserved in a botanical garden or in some controlled circumstances-

Last Answer : The method by which endangered plant species are conserved in a botanical garden or in some controlled ... Ex situ conservation D. None of the above

Royal Bengal tiger is conserved in :

Description : Royal Bengal tiger is conserved in :

Last Answer : Royal Bengal tiger is conserved in : A. Gir forest B. Sunderbans C. Kanha National Park D. Jim Corbett National Park

Wildlife is conserved in :

Description : Wildlife is conserved in :

Last Answer : Wildlife is conserved in : A. In situ B. Ex situ C. Both (1) and (2) D. None of these

All forms of life should be conserved because :

Description : All forms of life should be conserved because :

Last Answer : All forms of life should be conserved because : A. They will be otherwise lost B. They ... D. They are important for maintaining balance of nature

What is the condition for the total momentum of a system to be conserved?

Description : What is the condition for the total momentum of a system to be conserved?

Last Answer : Need answer

When there is no external force acting on a body , which physical quantity is conserved?

Description : When there is no external force acting on a body , which physical quantity is conserved?

Last Answer : Force and laws of Motion

How is the fertility of soil renewed and conserved?

Description : How is the fertility of soil renewed and conserved?

Last Answer : Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks, affect both erosion and fertility.

In which of the following ways can soil be conserved? 1. Contour ploughing 2. Terracing 3. Shifting cultivation 4. Crop rotation (a) I, II and IV (b) II, III and IV (c) II and IV (d) I and III shop.ssbcrack.com

Description : In which of the following ways can soil be conserved? 1. Contour ploughing 2. Terracing 3. Shifting cultivation 4. Crop rotation (a) I, II and IV (b) II, III and IV (c) II and IV (d) I and III shop.ssbcrack.com

Last Answer : Ans: (a)

Soil can best be conserved on the hills by which of the cultivating methods? (a) Strip cropping (b) Crop rotation (c) Contour ploughing (d) Terracing

Description : Soil can best be conserved on the hills by which of the cultivating methods? (a) Strip cropping (b) Crop rotation (c) Contour ploughing (d) Terracing

Last Answer : Ans: (c)

In an inelastic collision, state which of the following statements is true: (a) Momentum is conserved and kinetic energy is conserved. (b) Momentum is not conserved and kinetic energy is conserved. (c) Momentum is conserved and kinetic energy is not conserved. (d) Momentum is kinetic energy are not conserved.

Description : In an inelastic collision, state which of the following statements is true: (a) Momentum is conserved and kinetic energy is conserved. (b) Momentum is not conserved and kinetic energy is conserved ... conserved and kinetic energy is not conserved. (d) Momentum is kinetic energy are not conserved.

Last Answer : Ans:(c)

A moving bullet hits a solid target resting on a frictionless surface and gets embedded in it. What is conserved in this process? (a) Both momentum and kinetic energy (b) Kinetic energy alone (c) Momentum alone (d) Neither momentum nor kinetic energy

Description : A moving bullet hits a solid target resting on a frictionless surface and gets embedded in it. What is conserved in this process? (a) Both momentum and kinetic energy (b) Kinetic energy alone (c) Momentum alone (d) Neither momentum nor kinetic energy

Last Answer : Ans:(c)

Lion is conserved at – (1) Kaziranga Sanctuary (2) Gir Sanctuary (3) Corbett National Park (4) Manas Sanctum

Description : Lion is conserved at – (1) Kaziranga Sanctuary (2) Gir Sanctuary (3) Corbett National Park (4) Manas Sanctum

Last Answer : (2) Gir Sanctuary Explanation: The Gir Forest National Park and Wildlife Sanctuary is a forest and wildlife sanctuary in Gujarat, is the sole home of the pure Asiatic Lions and is considered to be one of ... in 1965, the park is located to the south-east of Junagadh and to south west of Amreli.

If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is A. elastic B. inelastic C. conserved D. not conserved

Description : If the total kinetic energy and momentum of a system becomes zero after collision, then the collision is A. elastic B. inelastic C. conserved D. not conserved

Last Answer :  inelastic

In a perfectly elastic collision, momentum and energy are A. not conserved B. conserved C. becomes zero after collision D. equal before collision

Description : In a perfectly elastic collision, momentum and energy are A. not conserved B. conserved C. becomes zero after collision D. equal before collision

Last Answer : conserved

In elastic collisions, A. only the total momentum of the colliding objects is conserved. B. only the total kinetic energy is conserved. C. both of the momentum and total kinetic energy are conserved. D. neither momentum of the colliding bodies nor the total kinetic energy are recoverable.

Description : In elastic collisions, A. only the total momentum of the colliding objects is conserved. B. only the total kinetic energy is conserved. C. both of the momentum and total kinetic energy ... D. neither momentum of the colliding bodies nor the total kinetic energy are recoverable.

Last Answer : both of the momentum and total kinetic energy are conserved.

Which vitamin is conserved by par-boiling of rice (a) Vit-c (b) Vit-D (c) Vit-B (d) Vit-B12

Description : Which vitamin is conserved by par-boiling of rice (a) Vit-c (b) Vit-D (c) Vit-B (d) Vit-B12

Last Answer : (d) Vit-B12

In a chemical reaction, __________ are conserved. (A) Ions (B) Masses (C) Atoms (D) Both (B) & (C)

Description : In a chemical reaction, __________ are conserved. (A) Ions (B) Masses (C) Atoms (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.

Description : In the semiconservative method of replication a. Both parent strands are degraded. b. One parent strand is conserved in each of the the new dna. c. Both parent strands reform with one another. d. Okazaki fragments form both of the new molecules of DNA.

Last Answer : b. One parent strand is conserved in each of the the new dna.

Soil can best be conserved on the hills by which of the cultivating methods?

Description : Soil can best be conserved on the hills by which of the cultivating methods?

Last Answer : Contour ploughing

A thermodynamic process in which entropy is conserved  a. isentropic  b. adiabatic  c. isothermal  d. polytropic

Description : A thermodynamic process in which entropy is conserved  a. isentropic  b. adiabatic  c. isothermal  d. polytropic

Last Answer : isentropic

Which one of the following quantities is conserved in pair production? a) Energy b) Charge c) Linear momentum d) All

Description : Which one of the following quantities is conserved in pair production? a) Energy b) Charge c) Linear momentum d) All

Last Answer : d) All

In a collision, which of the following four quantities is always conserved? w) momentum x) kinetic energy y) torque z) moment of inertia

Description : In a collision, which of the following four quantities is always conserved? w) momentum x) kinetic energy y) torque z) moment of inertia

Last Answer : ANSWER: W -- MOMENTUM

In any collision, which of the following is conserved: w) kinetic energy x) velocity y) momentum z) potential energy

Description : In any collision, which of the following is conserved: w) kinetic energy x) velocity y) momentum z) potential energy

Last Answer : ANSWER: Y -- MOMENTUM

An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of inertia is increased. x) Kinetic energy is conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Description : An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of ... conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Last Answer : ANSWER: Y -- THE SKATER DOES WORK WHEN PULLING IN HER ARMS 

What is the specific humidity? A. the ratio of the mass of water vapour to the mass of the total mixture of air and water vapour B. the ratio of the mass of dry air to the mass of the total mixture of air and water vapour C. the ratio of the mass of dry air to the mass of water vapour in a mixture of air and water vapour D. the ratio of the mass of water vapour to the mass of dry air in a mixture of air and water vapour

Description : What is the specific humidity? A. the ratio of the mass of water vapour to the mass of the total mixture of air and water vapour B. the ratio of the mass of dry air to the mass of the total mixture ... ratio of the mass of water vapour to the mass of dry air in a mixture of air and water vapour

Last Answer : ANSWER : D

A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is (A) 0.50 (B) 0.58 (C) 0.68 (D) 0.62

Description : A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is (A) 0.50 (B) 0.58 (C) 0.68 (D) 0.62

Last Answer : (A) 0.50

If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is (A) 0 (B) 1 (C) < 1 (D) > 1

Description : If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is (A) 0 (B) 1 (C) < 1 (D) > 1

Last Answer : (B) 1

Pick out the wrong statement. (A) The Reynolds analogy for mass transfer is given by Lewis relation and is applicable, when Schmidt number is one (B) Sherwood number for flow in pipes can be expressed as the ratio of the concentration gradient at wall to the overall concentration difference (C) According to film theory for equimolar counter diffusion, the mass transfer coefficient is given by DAB(B)P - 3, Q - 2 (D) The z-component of the total mass flux of a component A in binary mixture of A and B is given by - Dab'.dCA/dz

Description : Pick out the wrong statement. (A) The Reynolds analogy for mass transfer is given by Lewis relation and is applicable, when Schmidt number is one (B) Sherwood number for flow in pipes can be expressed ... flux of a component A in binary mixture of A and B is given by - Dab'.dCA/dz

Last Answer : (C) According to film theory for equimolar counter diffusion, the mass transfer coefficient is given by DAB(B)P - 3, Q - 2

Pick out the wrong statement. (A) The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same for NSc = NPr= 1 (B) 1 Nm3 of dry air is lighter than 1Nm3 of humid air (C) The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass diffusivity

Description : Pick out the wrong statement. (A) The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same for NSc = NPr= 1 (B) 1 Nm3 of dry air is lighter ... ) The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass diffusivity

Last Answer : (B) 1 Nm3 of dry air is lighter than 1Nm3 of humid air

The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling? (A) Liquid side (B) Gas side (C) Interfacial (D) Both liquid and gas side

Description : The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of ... A) Liquid side (B) Gas side (C) Interfacial (D) Both liquid and gas side

Last Answer : (B) Gas side

In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg) (A) 6.89 (B) 8.89 (C) 10 (D) 8.25

Description : In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate ... phase is (in Kg) (A) 6.89 (B) 8.89 (C) 10 (D) 8.25

Last Answer : (B) 8.89

A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is (A) d(VCA )/dt = -F (CAF - CA ) - kCA 2V (B) d(VCA )/dt = F (CAF - CA ) - kCA 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Description : A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume ... 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Last Answer : (D) d(VCA )/dt = FCAF - kCA 2V

Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam. (A) Bomb (B) Separating (C) Bucket (D) Throttling

Description : Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam. (A) Bomb (B) Separating (C) Bucket (D) Throttling

Last Answer : A) Bomb

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Description : Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Last Answer : Option B

The ratio of the mass of vapor to the total mass of the mixture is called ______.  A. Vapor ratio  B. Vapor content  C. Vapor index  D. Quality

Description : The ratio of the mass of vapor to the total mass of the mixture is called ______.  A. Vapor ratio  B. Vapor content  C. Vapor index  D. Quality

Last Answer : Quality

According to Avogadro’s law  A. the product of the gas constant and the molecular mass of an ideal gas is constant  B. the sum of partial pressure of the mixture of two gases is sum of the two  C. equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules  D. all of the above

Description : According to Avogadro's law  A. the product of the gas constant and the molecular mass of an ideal gas is constant  B. the sum of partial pressure of the mixture of two gases is sum of the ... all gases, at the same temperature and pressure, contain equal number of molecules  D. all of the above

Last Answer : Answer: C

The basis of the technique of chromatography for separating components of a mixture is? A. the differing movement of particles of different mass in an electrical field B. the interaction of the components with a stationary and a mobile phases C. the absorption of infrared radiation by the components. D. the deflection of charged particles in a magnetic field.

Description : The basis of the technique of chromatography for separating components of a mixture is? A. the differing movement of particles of different mass in an electrical field B. the interaction of the ... infrared radiation by the components. D. the deflection of charged particles in a magnetic field. 

Last Answer : the interaction of the components with a stationary and a mobile phases