2. The figure shows a pin-supported member, ABD, in static equilibrium. The mass of the member is negligible. Calculate the support reactions at B and D, and state if CD is in tension or compression. 8 in A 2 ft 14 in 300 lb 하 방 B 50 lb-in 4 ft D 2 ft
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A: Step 1: Step 2: Step 3: Step 4: solution is given above
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- Locate the radial distance of the radial nodes in the 3s orbital of an H atom.a.) node closest to nucleus (in Angstroms) : b.) node farthest from nucleus (in Agstroms)The following nuclear reaction is an example of22688Ra→42He+22286RnOnce again, the 3-He formed in the middle reaction has less mass than the 2-H and 1-H that fused to form it, and the missing mass converts to other forms of energy according to E = mc2. Using the numbers in the Atomic Mass column, calculated D + H - 3He. Type the entire calculator answer carefully. [it should be positive, similar in style to 0.002179] (1) Atomic Number (2) Element (3) Symbol (4) (5) Atomic (6) % Abundance (or Radioactive Decay Mode) (7) Half-life (if radioactive) Mass Number, Mass 0. (Neutron) 1.008665 10.4 min Hydrogen Deuterium Tritium 1 H. 1.007825 2.014102 3.016049 99.985% 0.015% D. T. 3 12.33 yr Helium Не 3.016029 0.000137% 99.999863% 4.002602 3 Lithium Li 6.015121 7.016003 7.5% 92.5% 4 Beryllium Be 7.016928 ЕС, 53.29 days 9.012182 100 47 9
- Complete the following reactions and explain each one:An ancient rock is found to contain 40Ar gas, indicating that of the 40K in the rock has decayed since the rock solidified. Any argon would have boiled out of liquid rock. The half-life of 40K is 1.25 billion years. How long ago did the rock solidify? O2.6 billion years 0.30 billion years O 1.8 billion years O 0.50 billion years11. Calculate the energy released in the reaction shown below. Li+ n → He+ H Particle Mass (u) Li 6.01513 in 1.00867 4.0026 He 3.01604
- 4. From van der Waals equation, using (2²) ₁ = =0= (OVD), T a = ² - RT₁Vmc Show that and Tc b 8a 27Rb Vmc 3 5. Show that the Lennard-Jones energy -(1) a Pc = 27b²² ----(ii) has a minimum value equal to - e at r = 2¹/6σ. Vmc = 3b 12 U₁, (r) = 4€ [(-) ¹² - ()]6. Find the threshold kinetic energy for the following reactions: (a) p+p→→n+E+Kº+a* (b) p+n→p+E+K*Fill the blank the Lead 214 82Pb turn to Bismuth isotop 21483Bi ، When a nucleus radiates ( ) explain your answer by the balanced nuclear equation
- why did you just get rid of the 10-3 and what is morProb. 6. Illumination- decay of excess carriers An n-type Si sample is doped at 1015 cm3. We shine light on it to create electron-hole pairs at 1019 cms. The lifetime of minority carriers is 100 ns. a. What is the steady state concentration of minority carriers? b. How much time has elapsed for the excess carrier concentration to be at 90% of the initial value? C. How much time has elapsed for the excess carrier concentration to decay to 10% above the minority carrier concentration at thermal equilibrium?2. State any three conservation laws that restrict a reaction from happening in particle physics and explain how they restrict reactions.