The uniform 14-m pole has a mass of 130 kg and is supported by its smooth ends against the vertical walls and by the tension T in the vertical cable. Compute the magnitudes of the reactions at A and B. A 5 m T 9 m 10 m B
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- 5 Answer the following questions: a) For a homogeneous nucleation process, sketch the dependence of the surface and bulk free energies on the radius of a spherical embryo using the equation below. kT AG, = 4rv*y -* inS V, AG > r b) Sketch the dependence of the free energy changes (AG,) on the radius of a spherical embryo when the supersaturation ratio (S) is greater than 1, equal to 1 and less than 1. AG c) Discuss the importance of supersaturation on precipitationDetermine the reactions at the support A and B in the loading below at equilibrium. The weight of the beam is negligible.Calculate the threshold energy for the following reactings: (i) n+Th²³2 → Th²³1 + 2n (ii)n+Th232 → Th²33 + y
- From the following data for the first-order gas- phase isomerization of CH3 NC at 215 °C, calculate the first-order rate constant and half-life for the reaction: Time (s) Pressure CH3 NC (torr) 4 Part A Calculate the first-order rate constant. Express your answer using three significant figures. 0 510 2000 345 5000 192 8000 107 12000 49 15000 27.3 Part B k ΜΕ ΑΣΦ Submit Request Answer 0 ? Calculate the half-life. Express your answer using three significant figures. ΑΣΦΑ Ο ΑΣΦ 1/2 ? 8-1 SAn archeologist discovers the bones of a person believed to have been dead for 600 years. Using carbon dating, they wish to confirm the time of the person's demise. The rate of change of 146C is 0.270 Bq/g of carbon for the bones of a person who had just died. If the archeologist is correct about the person's time of death, what rate of 146C change of should they find when they carbon date the bones? The half life of 146C is 5.73 x 103 y. A. 0.245 Bq/g B. 0.267 Bq/g C. 0.251 Bq/g D. 0.238 Bq/g E. 0.259 Bq/gFg KE = mv², Ug Gm₂mz r2 == 2 ac -2²₁v=2²7₁9= = 27, g = GM, Vesc = = Gm₁m₂ T 2GM VR E = KE + Ug, G = 6.674 x 10-¹1 N. m²/kg² }
- A neutron in a star makes an elastic head-on collision with a carb on nucleus initially at rest. The mass of the carbon nucleus is 12 times the mass of the neutron mn = 1.7 ×10^−27kg. The initial kinetic energy of the neutron is 1.6 × 10^−13J. a) Show that the final speed of the carbon nucleus, Vc, is given by (see image) where vn is the initial speed of the neutron.please help me do b and cB please, help
- A car does 17000 km/year. One litre of fuel has mass 0.84 kg. Due to inertia when starting, kinetic energy required to reach a fixed speed and rolling resistance, all increasing with increased mass, 0.4 L/100 km of exrta fuel are used for every extra 100 kg of mass. If the fuel is 86% carbon, and this is entirely oxidised to form CO2 during combustion, how much extra CO2 is emitted per year if the car is driven with an average of 35 L of fuel rather than an average of 15 L? Atomic masses of C and O are 12 and 16 respectively. O a. 30 kg O b. 39.kg O c. 144 kg O d. 33 kg O e. 11 kgLearning Goal: Radioactive decay - Half-life N 1,000,000 500,000 250,000 125,000 62,500 Number of nuclides, N x 10³ 1000 750 500 250 125 0 Time 0 the 2012 3h2 4112 5h2 612 7h2 8h2 9412 10₁2 31,250 15,625 he 2h 3h 4h 5h 6h 7he 8he 9h 10h Time in multiples of f 7,813 3,906 1,953 977 A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour = 60 min, 1 min = 60 sA = 2î + 3} + k B-41+ 2ĵ- k C = 2î - 3ĵ+ 4k c) (AXB) (CX B)