Find the amount of this radioactive substance at any time 't'. The decay constant/radioactive constant for Uranium is 3.1 x 10-17s-1. Also calculate the half life of Uranium.
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- F THIN NTVERSITY 195 Problem Atomic percent silver 30 If 500 g of a 40 wt % Ag-60 wt % °F °C 1100 10 20 40 50 60 70 80 90 Cu alloy is slowly cooled from 1084.5° 1900 1000°C to just below 780°C 1000 L. 961.93 1700 (a) How many grams of liquid and 900 53 L+a 1600 proeutectic a are present at 850°C? 800 F a L+B B 1400 (b) How many grams of liquid and 780° 7.9 71.9 91.2 700- proeutectic a are present at 780°C + AT ? 1200 600 a + B (c) How many grams of a are present in 1000 the eutectic structure at 780°C - AT ? 500 850 400 Cu (d) How many grams of B are present in 10 20 30 40 50 60 70 80 90 Ag Weight percent silver the eutectic structure at 780°C - AT ?If I have 2.4 kg of Silver that I need to melt at the melting point , how much heat needs to be added? (Lf for Silver :88,300) Answer in Joules answer in standard formIn a stress strain curve of mild steel, the elastic limit will be before the limit of proportionality. Select one: O True O False The following figure represents Body Centered Cubic structure Select one: O True e here to search 99+ hp fs f6 f8 fg 3 & 7 LO %24
- Radium decomposes at a rate proportional to the amount present. If half of the original amount disappears after 923yrs, what is the percentage lost in 100 years?I need a clear and fast answer within 20 minutes | dybala A radioactive material of 20gm has 12.5 years. Who much gm of the sample will remain after 50years? (1.25 g)1. Temperature (°C) From the diagram below, analyze a 40%Ni-60% Cu alloy at 1250°C. a.) What phases are present? b.) What are their chemical compositions? C.) If our system contains 100 grams, how much of each phase is present? 1300 MM CM 1200 20 -Liquid a Liquid. 112 3 4 5 ½ a 30 20 3 8 40 Composition (wt% Ni) 9 10 11 12 ½ 4 ½ 50
- An accident at a nuclear power plant has left the surrounding area polluted with radioactive material that decays naturally. The initial amount of radioactive material present is 31 su (safe units), and 6 months later it is still 18 su. (a) Write a formula giving the amount A(t) of radioactive material (in su) remaining after t months. (b) What amount of radioactive material will remain after 8 months? (c) How long will it be until A = 1 su, so it is safe for people to return to the area?An object is heated from 20 C to 70 C. On the Kelvin scale, this is an increase of 50 K. "c. Select one: O True FalseConvert the tungsten melting point temperature, 6192 oF into Kelvin units. 3,681 K 11,451 K 3,695 K 11,476 K 6,465 K
- Radium decomposes at a rate proportional to the amount present. If the half-life is 1,600 years, that is, half of any given amount is decomposed in 1,600 years, find the percentage remaining at the end of 200 years.1- The shape of phase diagram draw by lever rule is * Liquidus-A'bB' B' Liquid |r L+S Solidus - A'dB Solid U' 90 100 В 10 20 30 40 50 60 70 s0 A (o) Composition O True O False TemperatureQuestion 1 The graph below shows the electrical conductivity of some elements from the periodic table. Antimony Carbon Ruthenium Copper Silver 0. 20 40 60 80 Electrical conductivity (x10° S/m) 1.1. With the aid of a clearly labelled graph, describe the effect of temperature on the electrical conductivity of copper and antimony. сopper 1.2. Explain the difference in the electrical conductivity of ruthenium and antinomy. 1.3. Adding small quantities of boron may increase the electrical conductivity of antimony. With the aid of a labelled diagram, explain how this is possible. Besides lower electrical conductivity, suggest a reason why ruthenium is not used in electrical transmission wires. Give a detailed response. 1.4.