Radium decomposes at a rate proportional to the amount present. If half of the original amount disappears after 1000yrs, what is the percentage lost in 243 years?

Q: Given the number of air molecules at z = 20 km as 1.7*1018 molecules/cm3 and  z=25 km as 8.7*1017…

A: The mixing ratio of ozone: The quantity of ozone molecules per million air molecules as a marginal…

Q: The jet fuel in an airplane has a mass of 89500 g and a density of 804 mg/cm. What is the volume of…

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Q: For a temperature of 10 degree C, calculate the time needed for the following particles to settle…

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Q: A gas is compressed under isothermal condition. The change of pressure is from 800 atm. to 803 atm.…

A: given Isothermal conditionchange in pressure=800 atm to 803 atm

Q: At 212 degrees fahrenheit mercury has a specific weight of 834 lb/ft3. What volume of the mercury…

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Q: Benzene and Kerosene has a specific weight of 53 and 49 lb/cu.ft. respectively. The weight of…

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Q: Calculate of the porosity of a cubic packing model of uniform spheres？

A: Given data in question  Cubical packing Uniform spheres To find out  Porosity Note V = total volume…

Q: Calculate the temperature of 0.39 mole of Xenon gas that occupies 9850 millimeters under a pressure…

A: we know that:    PV = nRT here, P = Pressure = 631 torr V = volume = 9850 mL n = mole = 0.39 mole of…

Q: 3. A zircon sample contains 4000 atoms of the radioactive element 235U. Given that 235U has a…

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Q: If the specific volume of a certain gas is 0.63 m /kg, what is its specific weight in

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Q: 3. A certain radioactive material is known to decay at a rate proportional to the amount present. If…

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Q: Radium decomposes at a rate proportional to the quantity of radium present Suppose that it is found…

A: Given:-  Radium decomposes at a rate proportional to the quantity of radium present Suppose that it…

Q: Solve the given problem with complete solution 10. One of the most harmful components of nuclear…

A: Strontium-90 (Sr-90) is an radioactive isotope of strontium produced by nuclear fission.

Q: In 100 yrs, 100mg of radium decomposes to 96mg. How many mg will be left after 217 yrs?

A: Solution: Given          In 100 years,100mg of radium decomposes          to 96mg 217years,…

Q: What is the specific gravity of kerosene, which has a specific weight of 7.853103 N/m?

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Q: A bullet of mass 20 gram is moving with a velocity of 450 m/s. What is its Kinetic Energy?

A: Given data : Mass (m)=20 g Velocity (V)=450 m/s

Q: A certain radioactive material follows the law of exponential growth. If between noon and 2 pm the…

A: Introduction- The Exponential growth is the process through which quantity rises over time. It…

Q: n 59 yrs, 100mg of radium decomposes to 96mg. How many mg will be left after 200 yrs?

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Q: Why is it not economical to try to transport gaseous CO2 ?

A: Answer IntroductionGreenhouse gases are mainly responsible for gradually increasing the atmospheric…

Q: Briefly describe what radon is and the reasons for being concerned about its presence.

A: Radon is a toxic gas that exists naturally and can cause lung cancer. Radon gas is colourless,…

Q: How long would it take a current of 100 A to deposit 10.0 g of Fe from FeCl 2

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Q: If you measured the energy of this particle, what values might you get, and with what probabilities?

A: d) If we measure the energy we might get E0 and E1, where E0 = 12h¯ωE1 = 1+12h¯ω = 32h¯ω Where the…

Q: A piston cylinder device contains 5 kg hydrogen gas. Heat is transferred to the hydrogen as the…

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Q: A metal ball of radius 90 centimeters is coated with a uniformly thick layer of ice, which is…

A: Solution-The given values are,The inner ice layer radius (Ri)=90cmThe rate of change of volume w.r.t…

Q: Sel 10 only: 1. Which one has low Si + Al elements, land Earth crust or oceanic Earth crust? 2.…

A: 1) heavier minerals are found in lower parts of crust. But mineral like Al are not found in oceanic…

Q: The half-life of a radioactive substance is defined to be the amount of time it takes for the…

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Q: A metal rod made of some alloy is to be used as a thermometer. At 0oC its length is 40000cm, and at…

A: The change in dimension of any body depends upon many factors and one of those is temperature.Change…

Q: A 400-kg satellite was placed in a circular orbit 1500 km above the surface of the earth. At this…

A: Given data,  Mass, m = 400 kg Velocity, v = 25.6 x 10³ km/h Acceleration of gravity = 6.43 m/s²   To…

Q: tadium decomposes at a rate proportional to the amount present. If the half of the original amount…

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Q: 1. The half-life of a radioactive substance is 2 days. Find the time required for a given amount of…

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Q: A gas at 20°C may be considered rarefied and deviating from the continuum concept. If the gas…

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Q: A metal ball of radius 90 centimeters is coated with a uniformly thick layer of ice, which is…

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Q: Calculate the weight of 1m of kerosene if it has a mass of 855 kg. Provide answer in kN, to the…

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Q: Cesium decomposes approximately at a rate proportional to the amount present. If 80 g will be 76 g,…

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Q: The density of mercury is 13.6g/cm3. what is the density in lb/ft3?

A: The density, of a substance is its mass per unit volume. Given data : Density of mercury is 13.6…

Q: Jet propuislon is a method of generating

A: It is a method of generating propulsive force by reaction of accelerating mass. The force exerted by…

Q: A proximate analysis of a sample of MSW is conducted and the following data is recorded. Calculate…

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Q: Gasoline has a specific weight of 7000 N/m^3. Which nearly gives its mass in kilograms when poured…

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Q: Two bullets of identical mass are fired with speeds 40 m/s and 80 m/s, respectively. What is the…

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Q: The radioactive isotope Carbon-14 has a half-life of 5,730 years. Given 300 grams of C-14, what is…

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Q: An iron cannonball (specific gravity 7.87) floats in the mercury (specific gravity 13.56). What…

A: Answer : We are given  Specific gravity of cannonball(SG)ball  = 7.87 Specific gravity of…

Q: A certain gas initially at 0.050 L undergoes expansion until its volume is 0.50 L. Calculate the…

A: A type of elastic collision in which two objects of equal mass initially move in the same direction…

Q: 1. The unit weight of one tank of kerosene is 1.4x 10^9 dyne/ m^3 and has a mass of 1,980 kg. Find…

A: Given Data: For kerosene Unit wt = 1.4×109 dyne/m3massm=1,980 kgTo calculate(a) Volume in cm3b mass…

Q: The 1986 disaster in the former Soviet Union at the Chernobyl nuclear power plant explosion sent…

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Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.