Why do hot particles move faster than the cool gas particle?

Why do hot particles move faster than the cool gas particle?
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Which of the following statement is false? a.The potential energy of a particle has the form Ep = k2x. The force acting on the particle is constant (k is a constant) b.The linear velocity of bodies near the earth's equator (due to rotation of earth) is more than the velocities of particles at the pole c.107 dynes d.A cyclist should move along a zig-zag path while ascending a steep hill e.The density of milk decreases when cream is taken out of milk

Description : Which of the following statement is false? a.The potential energy of a particle has the form Ep = k2x. The force acting on the particle is constant (k is a constant) b.The linear velocity of ... zag path while ascending a steep hill e.The density of milk decreases when cream is taken out of milk

Last Answer : e. The density of milk decreases when cream is taken out of milk

How do particles in warm water move faster than cold water?

Description : How do particles in warm water move faster than cold water?

Last Answer : ROUGHLY SPEAKING, that's what temperature is about.Actually, ahigher temperature is more accurately described as the averageenergy per particle and per degree of freedom; but for one and thesame substance, higher energy will also imply higher speeds.

Does blowing on hot food really make it cool faster, and if so, why?

Description : Does blowing on hot food really make it cool faster, and if so, why?

Last Answer : Depends on the density of the food. A piece of steamed cabbage held aloft with a fork, yes. A 4 inch deep bowl of boiling Oatmeal, no. lol Stirring AND blowing would be most effective. haha

The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Description : The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Last Answer : (4) Alpha Particle Explanation: The formula for kinetic energy in terms of momentum for fundamental particles is basically just a quantized version of the classical formula, KE=(P^2)/2m, where KE is kinetic energy, p is momentum and m is the particle’s mass.

The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Description : The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle

Last Answer : Alpha Particle

According to the equation ‘r = (mv)⁄(Be)’, the faster moving particles A. move in smaller circle B. move straight C. move in bigger circle D. move randomly

Description : According to the equation ‘r = (mv)⁄(Be)’, the faster moving particles A. move in smaller circle B. move straight C. move in bigger circle D. move randomly

Last Answer : move in bigger circle

In terms of particles how evaporation causes hot water to cool?

Description : In terms of particles how evaporation causes hot water to cool?

Last Answer : For a molecule of water to change from a liquid to a gas requires it absorb heat, called the heat of vaporization. Evaporation is the conversion from a liquid (water) to a gas (water vapor), so each molecule that evaporates takes the heat of vaporization with it making the remaining water cooler.

Pick out the wrong statement. (A) The binary diffusivity in liquids is of the order of 10 -5 cm2 /sec (B) Molecular diffusion in solid is much faster than that in liquids (C) Particles movement from higher concentration to lower concentration takes place in diffusion process (D) According to Poiseuille's law, the permeability decreases with increase in temperature for flow of a gas through a given capillary

Description : Pick out the wrong statement. (A) The binary diffusivity in liquids is of the order of 10 -5 cm2 /sec (B) Molecular diffusion in solid is much faster than that in liquids ( ... Poiseuille's law, the permeability decreases with increase in temperature for flow of a gas through a given capillary

Last Answer : (B) Molecular diffusion in solid is much faster than that in liquids

Which describes the path of a gas particle between collisions with other particles?

Description : Which describes the path of a gas particle between collisions with other particles?

Last Answer : This path is a straight line.

Will Water will melt faster on a very cold soft drink than it will on a cool soft drink?

Description : Will Water will melt faster on a very cold soft drink than it will on a cool soft drink?

Last Answer : Yes, water will melt faster on a very cold soft drink can. Thisis due to evaporation, which tends to become expedited during coldand frigid temperatures.

Why does land heat and cool faster than water?

Description : Why does land heat and cool faster than water?

Last Answer : beacause its solid

The waste heat energy could be used to produce ....... a) Cool air b) Hot air c) Exhaust gas d) All of the above

Description : The waste heat energy could be used to produce ....... a) Cool air b) Hot air c) Exhaust gas d) All of the above

Last Answer : Cool air

Assertion :- Filtration of colloidal particles is not possible by filter paper. Reason :- Size of colloidal particle is less than filter paper pores.

Description : Assertion :- Filtration of colloidal particles is not possible by filter paper. Reason :- Size of colloidal particle is less than filter paper pores.

Last Answer : Assertion :- Filtration of colloidal particles is not possible by filter paper. Reason :- Size of ... D. If both Assertion & Reason are False.

Bond crushing law (A) Calls for relatively less energy for the smaller product particles, than does the Rittinger law (B) Is less realistic in estimating the power requirements of commercial crushers (C) States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product (D) States that the work required for the crushing is proportional to the new surface created

Description : Bond crushing law (A) Calls for relatively less energy for the smaller product particles, than does the Rittinger law (B) Is less realistic in estimating the power requirements of commercial crushers ( ... (D) States that the work required for the crushing is proportional to the new surface created

Last Answer : (A) Calls for relatively less energy for the smaller product particles, than does the Rittinger law

When considering visible light cured composites, which of the following statements is incorrect? A. An air-inhibited layer is present superficially on the composite. B. The wavelength of the light which affects the initiator is in the range of 450 to 500 nanometers. C. All other things equal. The light generally penetrates deeper into a small-particle composite than it does into a microfilled composite. (smaller particles absorb more light) D. B and C E. All are true

Description : When considering visible light cured composites, which of the following statements is incorrect? A. An air-inhibited layer is present superficially on the composite. B. The wavelength of the light which affects ... composite. (smaller particles absorb more light) D. B and C E. All are true

Last Answer : E. All are true

When a gas is heated the particles move more quickly. What is the change in volume of a heated gas if the pressure is kept constant ?

Description : When a gas is heated the particles move more quickly. What is the change in volume of a heated gas if the pressure is kept constant ?

Last Answer : When a gas is heated the particles move more quickly. What is the change in volume of a heated gas if the pressure is kept constant ?

I am present on a winter's day, Surprise me and I am taken away. The faster you run, the harder I am to catch, Try all you can, I am not easy to snatch. I am always with you, somewhere in the background, You wouldn't know it though, for I hardly make a sound. Keep your head cool and you will finally see, That I am inside you. What could I be? -Riddles

Description : I am present on a winter's day, Surprise me and I am taken away. The faster you run, the harder I am to catch, Try all you can, I am not easy to snatch. I am always with you, somewhere in the ... a sound. Keep your head cool and you will finally see, That I am inside you. What could I be? -Riddles

Last Answer : Your breath.

Do particles record every interaction they make with every other particle they encounter?

Description : Do particles record every interaction they make with every other particle they encounter?

Last Answer : Yes, but they record' their interactions with everything they encounter. Each interaction imparts some impulse but the echo of that dissipates with time. Particles are interacting with other particles ... the particular event you were attempting to record from the events before or after it.

Would it be possible to convert our assorted cyclotrons, linear accelerators and particle colliders to emit a directable stream of particles?

Description : Would it be possible to convert our assorted cyclotrons, linear accelerators and particle colliders to emit a directable stream of particles?

Last Answer : answer:Hmm, actually converting existing accelerators? That sounds highly impractical. However there are nuke-powered ion-propulsion drives designed to do just that, toss particles out the back end at extreme speeds, ... sails on the same craft I don't think you'll have a net gain of momentum.

The earth's gravitational force field is said to be conservative force field because a.The work acted by the earth's gravitational field on a particle is independent on the path traced out by the particle b.The work acted by the erth's gravitational field will cause same path for all particles irrespective of their mass c.The direction of gravitational force is fixed d.The gravitational field has only single directional component always acting normal to a body e.The value of gravitational force rise is fixed

Description : The earth's gravitational force field is said to be conservative force field because a.The work acted by the earth's gravitational field on a particle is independent on the path traced out by ... directional component always acting normal to a body e.The value of gravitational force rise is fixed

Last Answer : a. The work acted by the earth's gravitational field on a particle is independent on the path traced out by the particle

Successive emission of an `alpha`-particle and two `beta`-particles by an atom of an element result in the formation of its

Description : Successive emission of an `alpha`-particle and two `beta`-particles by an atom of an element result in the formation of its

Last Answer : Successive emission of an `alpha`-particle and two `beta`-particles by an atom of an element result in the formation of its

Four particles `alpha`-particle, deuteron and electron and a `CI^(-)` ion enter in a transverse magnetic field perpendicular to it with same kinetic e

Description : Four particles `alpha`-particle, deuteron and electron and a `CI^(-)` ion enter in a transverse magnetic field perpendicular to it with same kinetic e

Last Answer : Four particles `alpha`-particle, deuteron and electron and a `CI^(-)` ion enter in a ... shown in figure. Now match the following two columns.

Of the following particles, the particle having the least mass is (a) Meson (b) Neutron (c) Electron (d) Proton

Description : Of the following particles, the particle having the least mass is (a) Meson (b) Neutron (c) Electron (d) Proton

Last Answer : Ans:(c)

Which of the following particles has the dual nature of particle-wave? (1) Electron (2) Meson (3) Proton (4) Neutron

Description : Which of the following particles has the dual nature of particle-wave? (1) Electron (2) Meson (3) Proton (4) Neutron

Last Answer : (1) Electron

Filter medium resistance is that offered by the(A) Filter cloth(B) Embedded particles in the septum(C) Filter cloth and the embedded particle collectively(D) None of these

Description : Filter medium resistance is that offered by the (A) Filter cloth (B) Embedded particles in the septum (C) Filter cloth and the embedded particle collectively (D) None of these

Last Answer : (C) Filter cloth and the embedded particle collectively

Pick out the wrong statement. (A) Gape is the greatest distance between the crushing surfaces or the jaws (B) The angle of nip (2α) is the angle between roll faces at the level where they will just take hold of a particle and draw it in the crushing zone (C) Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing (D) Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product

Description : Pick out the wrong statement. (A) Gape is the greatest distance between the crushing surfaces or the jaws (B) The angle of nip (2α) is the angle between roll faces at the level where they will ... Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product

Last Answer : (C) Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing

Jigging is a technique by which different particles can be (A) Separated by particle size (B) Separated by particle density (C) Separated by particle shape (D) Mixed

Description : Jigging is a technique by which different particles can be (A) Separated by particle size (B) Separated by particle density (C) Separated by particle shape (D) Mixed

Last Answer : (A) Separated by particle size

Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) (A) m/ρ . Vp (B) m . ρ/Vp (C) m . Vp /ρ (D) Vp /m . ρ

Description : Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) (A) m/ρ . Vp (B) m . ρ/Vp (C) m . Vp /ρ (D) Vp /m . ρ

Last Answer : (A) m/ρ . Vp

The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle). (A) 6/D.ρ(B) 2/D.ρ (C) 4/D.ρ (D) 12/D.ρ

Description : The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle). (A) 6/D.ρ (B) 2/D.ρ (C) 4/D.ρ (D) 12/D.ρ

Last Answer : (A) 6/D.ρ

Sorting classifiers employing differential settling methods forseparation of particles make use of the differences in their(A) Particle sizes(B) Densities(C) Terminal velocities(D) None of these

Description : Sorting classifiers employing differential settling methods forseparation of particles make use of the differences in their (A) Particle sizes (B) Densities (C) Terminal velocities (D) None of these

Last Answer : (C) Terminal velocities

The specific surface of spherical particles is proportional to (where, Dp = diameter of particle). (A) D2 p (B) Dp (C) 1/Dp (D) 1/D2p

Description : The specific surface of spherical particles is proportional to (where, Dp = diameter of particle). (A) D2 p (B) Dp (C) 1/Dp (D) 1/D2p

Last Answer : (C) 1/Dp

For motion of spherical particles in a stationary fluid, the drag co￾efficient in hindered settling compared to that in free settling is (A) More (B) Less (C) Equal (D) More or less, depending on the type of particle

Description : For motion of spherical particles in a stationary fluid, the drag co￾efficient in hindered settling compared to that in free settling is (A) More (B) Less (C) Equal (D) More or less, depending on the type of particle

Last Answer : (A) More

Slugging in a fluidised bed can be avoided by using (A) Tall narrow vessel (B) Deep bed of solids (C) Shallow beds of solids and proper choice of particle size (D) Very large particles

Description : Slugging in a fluidised bed can be avoided by using (A) Tall narrow vessel (B) Deep bed of solids (C) Shallow beds of solids and proper choice of particle size (D) Very large particles

Last Answer : (C) Shallow beds of solids and proper choice of particle size

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 × 10 3 VOM + 10.94 × 10 6 V2 OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle ... fluidisation velocity, VOM is (A) 12 mm/s (B) 16 mm/s (C) 24 mm/s (D) 28 mm/s

Last Answer : (B) 16 mm/s

Which of the following is not an advantage of fluidisation from transferoperation point of view?(A) Intimate contact of the fluid with all parts of the solid particles(B) Lower fluid pumping power requirement(C) Minimisation of temperature variation(D) Prevention of particle segregation

Description : Which of the following is not an advantage of fluidisation from transferoperation point of view? (A) Intimate contact of the fluid with all parts of the solid particles (B) Lower fluid pumping power requirement (C) Minimisation of temperature variation (D) Prevention of particle segregation

Last Answer : (B) Lower fluid pumping power requirement

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 10 3 VOM + 10.94 × 10 6 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed? (A) 0.2 (B) 0.5 (C) 0.7 (D) 0.8

Description : A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system ... What is the porosity of the fluidised bed? (A) 0.2 (B) 0.5 (C) 0.7 (D) 0.8

Last Answer : (C) 0.7

A streamline is a line in flow field, (A) That is traced by all the fluid particles passing through a given point (B) Along which a fluid particle travels (C) Such that at every point on it, the velocity is tangential to it (D) None of these

Description : A streamline is a line in flow field, (A) That is traced by all the fluid particles passing through a given point (B) Along which a fluid particle travels (C) Such that at every point on it, the velocity is tangential to it (D) None of these

Last Answer : (C) Such that at every point on it, the velocity is tangential to it

For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the __________ is the controlling resistance. (A) Film diffusion (B) Diffusion through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Description : For the non catalytic reaction of particles with surrounding fluid, the same needed to achieve the same fractional conversion for particles of different unchanging sizes is proportional to the particle diameter, when the ... through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Last Answer : (C) Chemical reaction

For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance. (A) Film diffusion (B) Diffusion through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Description : For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, ... through ash layer (C) Chemical reaction (D) Either (A), (B) or (C)

Last Answer : (B) Diffusion through ash layer

Which of the following statements is correct? (A) Uniformity coefficient represents the shape of the particle size distribution curve. (B) For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity. (C) A soil is said to be well graded if it has most of the particles of about the same size (D) None of the above

Description : Which of the following statements is correct? (A) Uniformity coefficient represents the shape of the particle size distribution curve. (B) For a well graded soil, both uniformity coefficient and coefficient of ... if it has most of the particles of about the same size (D) None of the above

Last Answer : Answer: Option D

02. A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other is called turbulent flow. A) Agree B) Disagree

Description : 02. A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other is called turbulent flow. A) Agree B) Disagree

Last Answer : A

A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called (A) Steady flow (B) Uniform flow (C) Streamline flow (D) Turbulent flow

Description : A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called (A) Steady flow (B) Uniform flow (C) Streamline flow (D) Turbulent flow

Last Answer : Answer: Option C

The flow in a pipe or channel is said to be non-uniform when (A) The liquid particles at all sections have the same velocities (B) The liquid particles at different sections have different velocities (C) The quantity of liquid flowing per second is constant (D) Each liquid particle has a definite path

Description : The flow in a pipe or channel is said to be non-uniform when (A) The liquid particles at all sections have the same velocities (B) The liquid particles at different sections have different ... The quantity of liquid flowing per second is constant (D) Each liquid particle has a definite path

Last Answer : Answer: Option B

The flow in a pipe or channel is said to be uniform when (A) The liquid particles at all sections have the same velocities (B) The liquid particles at different sections have different velocities (C) The quantity of liquid flowing per second is constant (D) Each liquid particle has a definite path

Description : The flow in a pipe or channel is said to be uniform when (A) The liquid particles at all sections have the same velocities (B) The liquid particles at different sections have different ... The quantity of liquid flowing per second is constant (D) Each liquid particle has a definite path

Last Answer : Answer: Option A

Which of the following is the most significant factor regarding filler in composite for increased strength: A. Particle size 1-3 micron B. Sub micron sized particles C. High concentration of the filler particles

Description : Which of the following is the most significant factor regarding filler in composite for increased strength: A. Particle size 1-3 micron B. Sub micron sized particles C. High concentration of the filler particles

Last Answer : C. High concentration of the filler particles

A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be: w) the same x) 2 times y) 4 times z) 8 times

Description : A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle? Will it be: w) the same x) 2 times y) 4 times z) 8 times

Last Answer : ANSWER: X -- 2 TIMES

Which of the following statements is TRUE about an ELASTIC collision between two particles? Is it true that: w) neither particle loses any of its kinetic energy x) neither particle loses any of its momentum y) the velocity gained by one particle is equal to that lost by the other z) the total kinetic energy before and after the collision remains constant

Description : Which of the following statements is TRUE about an ELASTIC collision between two particles? Is it true that: w) neither particle loses any of its kinetic energy x) neither particle loses any of ... that lost by the other z) the total kinetic energy before and after the collision remains constant

Last Answer : ANSWER: Z -- THE TOTAL KINETIC ENERGY BEFORE AND AFTER THE COLLISION RE

A charged particle is moving in a UNIFORM magnetic field. If the direction of motion of the charged particle is at right angles to the magnetic field, describe the shape of the charged particle's path.

Description : A charged particle is moving in a UNIFORM magnetic field. If the direction of motion of the charged particle is at right angles to the magnetic field, describe the shape of the charged particle's path.

Last Answer : ANSWER: CIRCULAR or CIRCLE

There are four fundamental forces in nature. A particle has been associated with each of these four forces. Name any TWO of these particles.

Description : There are four fundamental forces in nature. A particle has been associated with each of these four forces. Name any TWO of these particles.

Last Answer : ANSWER: GRAVITON (for gravity), PHOTON (for electromagnetiy), GLUONS for s