The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

What is the monoisotopic and average mass of valine? Given data: Mass of the most abundant isotope of Carbon (C°)=12.0000, Mass of most abundant isotope of Hydrogen (H°)=1.0078, Mass of most abundant isotope of Oxygen (O°)=15.9949, Mass of most abundant isotope of Nitrogen (N°)=14.0031, The average mass of Carbon (C)=12.011, The average mass of Hydrogen (H)=1.008, The average mass of Oxygen (O)=15.999, The average mass of Nitrogen (N)=14.007.

A

99.068 and 99.2361

B

99.216 and 99.326

C

99.111 and 99.321

D

99.068 and 99.132

Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, $$\rho $$ = Density of substance, S = Specific heat and k = Thermal conductivity)

A

$${\text{h}} = \frac{{\text{k}}}{{\rho {\text{S}}}}$$

B

$${\text{h}} = \frac{{\rho {\text{S}}}}{{\text{k}}}$$

C

$${\text{h}} = \frac{{\text{S}}}{{\rho {\text{k}}}}$$

D

$${\text{h}} = \frac{{\rho {\text{k}}}}{{\text{S}}}$$

The ratio of momentum diffusivity to thermal diffusivity is the __________ number.

A

Prandtl

B

Nusselt

C

Stanton

D

Grashoff

Which number is defined as the ratio of momentum diffusivity to thermal diffusivity?

A

Prandtl number

B

Nusselt number

C

Reynold’s number

D

Sherwood number

The ratio of momentum diffusivity (kinematic viscosity) and mass diffusivity is referred as:

A

Nusselt number

B

Schimdt number

C

Sherwood number

D

Reynolds number

In fluid flow, heat and mass transfer, one encounters (i) kinematic viscosity μ (ii) molecular diffusivity (θ) and (iii) thermal diffusivity (α) the units of these quantities are:

A

μ, α and θ all have units of m/s

B

μ α and θ all have units of m²/s

C

μ and θ have units of m²/s while μ has units of m/s

D

μ and θ have units of m/s while μ has units of m²/s

In fluid flow and heat & mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are

A

μ, α and θ all have units of m/s

B

μ, α and θ all have units of m²/s

C

α and θ have units of m²/s, while μ has unit of m/s

D

α and θ have units of m/s, while μ has unit of m²/s

For a multi-electron atom $$l$$, L and S specify the one electron orbital angular momentum, total orbital angular momentum and total spin angular momentum respectively. The selection rules for electric dipole transition between the two electronic energy levels, specified by $$l$$, L and S are

A

ΔL = 0, ±1; ΔS = 0; Δ$$l$$ = 0, ±1

B

ΔL = 0, ±1; ΔS = 0; Δ$$l$$ = ±1

C

ΔL = 0, ±1; ΔS = ±1; Δ$$l$$ = 0, ±1

D

ΔL = 0, ±1; ΔS = ±1; Δ$$l$$ = ±1

If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

A

0

B

1

C

> 1

Deuteron in its ground state has a total angular momentum J = 1 and a positive parity. The corresponding orbital angular momentum L and spin angular momentum S combinations are

A

L = 0, S = 1 and L = 2, S = 0

B

L = 0, S = 1 and L = 1, S = 1

C

L = 0, S = 1 and L = 2, S = 1

D

L = 1, S = 1 and L = 2, S = 1

The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, N_Pr = N_Sc = __________

Related Questions