### Calculate the fraction of h atoms

Assignment Help Mechanical Engineering
##### Reference no: EM131330099

The ground state 1s1 H atom has two hyperfine states, F = 0 and F = 1, which correspond to different relative orientations of the nuclear spin and electron spin. The transition between these two states has a wavelength of 21 cm and is one of the most important transitions in observational astronomy. The shape of our galaxy and many of its other properties were determined by measurements of this transition. Calculate the fraction of H atoms in each of these states at a temperature of 100 K. he F = 1 state is the ground state and there are no other states with significant population.

#### Determine the expression for required torque

A solid cone of radius R and vortex angle 2θ is to rotate at an angular velocity, ω .An oil of dynamic viscosity µ and thickness ‘t' fills the gap between the cone and the h

#### Stress equals youngs modulus times strain

Hookes Law (Stress equals Young’s Modulus times Strain; or s=Ee) is valid for both linear tensile behaviour and torsion (or shear) as well (e.g. t=Gg). Imagine a shear test of

#### Deliver liquid water from a pond to a higher elevation

A pump is employed to deliver liquid water from a pond to a higher elevation. The pump steadily draws water from the pond at a volumetric flow rate of 192 gal/min through a pi

#### Water filled manometer is attached to the inlet

A water filled manometer is attached to the inlet and the test section of a low speed wind tunnel which has the contraction ratio of 3. what would be the pressure difference b

#### Develop a plan to break this communication barrier

Aliens have landed on earth and they come to your class first. They are very frustrated because they can not communicate with you. Develop a plan to break this communication

#### Calculate the load capacity of a precast concrete pile

Calculate the load capacity of a precast concrete pile that is 14in. in diameter and is driven into soil resistance of 2.5 tons per square foot. Assume the top 5 feet of the p

#### Determine the amount of oxygen in the tank

The pressure gauge on a 2.5-m^3 oxygen tank reads 500 kPa. Determine the amount of oxygen in the tank if the temperature is 28 degrees C and the atmospheric pressure is 97 kPa

#### Materials and manufacturing

You own an aluminium processing plant, and want to hot roll aluminium from a billet to a sheet form. The billet is 5m long, 3m wide and 0.25m thick. Your output sheet is to be