Why wouldn't you expect to detect strong 21 cmt emission from an HIl region?
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- Why was the Davis experiment only able to detect one-third of the neutrinos originally predicted? Most of the neutrinos were absorbed by Earth’s atmosphere. The neutrinos combined with other particles as they entered Earth’s atmosphere. The neutrinos distributed evenly among three different flavors while traveling to Earth. The number of neutrinos was too great to be held in the tank that Davis designed. The other two-thirds of neutrinos dissipated while traveling to Earth.Outoffollowingsetofquantumnumbers(n,l,ml,ms),whichoneispermittedforAlandwhichoneisnot.Giveproperreasoninsupportofyouranswer?(i)(2,0,2,1/2)(ii)(3,1,0,1/2)(iii)(4,0,2,1/2)(iv)(3,0,1,1/2)(4)(iv)Expressthequantumnumbersl,jandmjforn=5?(2)(v)Whatdoyoumeanbygroupvelocityandphasevelocity?Obtainadispersionrelationexplainit.calculate the ratio of eddusion rates for krypton and xenon gasses 0.637 : 1 1.25 : 1 1.57 : 1 or 0.799 : 1
- (CN-1) Consider two complex numbers: z₁ = 2 + 4i and Z2 = 9 - 6i (a) Calculate the following: |z₁|² and |z₂|². (b) Find the sum of the two complex numbers: Ztot = Z1 + Z2. Calculate |Ztot|².Please answer within 90 minutes.Calculate the resonance frequency of spin-flip transition of a proton in a magnetic field of 0.60 T. Which part of the electromagnetic spectrum does this frequency lie? (H,- 2.7928 nuclear magneton)
- What is the total energy of all the radiation in the current Hubble Radius? H0 = 70 km/s/Mps omega(radation) 0 = 9.0 x 10^-5A charged droplet is released between 2 vertical plates with an electric field across them. Calculate the deflection (z) of the droplet by the time it leaves the electric field region. You should first calculate the time spent by the droplet accelerating under the action of gravity Droplet mass: 3.5x10-15 kg Droplet charge: 861x10-19 C Gap (d): 0.1 m Length of plates (L): 0.3 m Voltage (VA-VB): 5 V Acceleration due to gravity 9.8 ms-2How much energy (W m-2) must be re-radiated if EIN = EOUT?