Some scientists believe that the collision of one or more large asteroids with the Earth was responsible for the extinction of the dinosaurs. The unit of kiloton is used to describe the energy released during large explosions. Itwas originally defined as the explosive capability of 1000 tons of trinitrotoluene (TNT) high explosive. Because that expression can be imprecise depending on the explosive's exact chemical composition, the kilotonsubsequently has been redefined as the equivalent of 4.186 x 1012 J. In the units of kiloton, calculate the kinetic energy of an asteroid that has the size (box-shaped, 13 x 13 x 25 km) and composition (density,2.4 g/cm) of an asteroid. Kinetic energy is defined byU. =mv?where m is the object's mass and v is its speed. Objects passing through the inner solar system generally have speeds in the range of 20 km/s.(Express your answer using two significant figures.)Uk =x1011 kilotons

Answered: Image /qna-images/answer/ab629010-7a02-4032-a89d-87e2c171afbb.jpg

Answered: Some scientists believe that the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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H,0 Iron block An unknown mass of iron at 80 °Cis dropped into an insulated tank that contains 0.1 m of liquid water at 20 °C. Meanwhile, a paddle wheel driven by a 220 W motor is used to stir the water. When equilibrium is reached after 30 min, the final temperature (T2) is 27 °C. Part A Determine the mass of the iron block. Express your answer to four significant figures and include appropriate units. Value Units Submit Request Answer Part B What-if scenario: What is the mass if the iron block is at 130 °C at the time of dropping? Express your answer to four significant figures and include appropriate units. HA Value Units Submit Request Answer
34. In 2017, around 550 quads of energy were consumed globally. Assuming that all of the energy is consumed at an equal rate throughout the year, determine the average power consumption of the world in Watts (or kW, MW, GW, etc.).
Suppose there are two identical gas cylinders. One contains the monatomic gas krypton (Kr), and the other contains an equal mass of the monatomic gas radon (Rn). The pressures in the cylinders are the same, but the temperatures are different. Determine the ratio KEr /KERN of the average kinetic energy of an atom of krypton to the average kinetic energy of an atom of radon. The answer should be a value.
Radium decomposes at a rate proportional to the amount at any instant. In 100 years, 100 mg of radium decomposes to 96 mg. How many mg will be left after 200 more years?
We have superheated steam at a pressure of 0.05 bar and temperature of 366.62 oC. What is the specific volume in units of m3/kg? Use the steam tables and report your answer to three decimal places. Note that in the steam tables, the specific volume is reported in units of m3/kg.
The coal combustion in the furnace of steam power plant produces 31.52 mega-Watts (MW) of heating power to produce steam. [0.1*p] mega-Watts are lost from the factory infrastructure (pipes, vanes, etc). The depleted steam is cooled by a water cooling system that expels [0.45*p] of waste heat to the environment. Calculate the net mechanical power output. Present your answer in mega-Watts (MW).
Most collisions are inelastic, meaning the kinetic energy is not conserved in the system. (a) What are the three most common ways for energy to leave a system during a collision? To the best of my knowledge, the use of the word "perfectly" in a perfectly elastic collision is not necessary. Any elastic collision is a perfectly elastic collision. Both concepts mean the kinetic energy is conserved. The use of the word "perfectly" in perfectly inelastic collisions is just telling you that the two objects end up sticking to each other (have the same final velocity). (b) Combine the equations for the 1-D conservation of linear momentum and the conservation of kinetic energy to create a third equation. Any two of these equations now contain all the information, so the three equations are said to be linearly dependent in math-speak. This means we only need to use any two equations for our solutions, naturally we will chose the simplest two. (c) Use two of these equations along with…
Kayla began a science experiment with 18 grams of an unknown solid. During the experiment, the change in the mass of the solid was – 7 grams. What was the mass of the solid at the end of the experiment? To solve the problem, Edna subtracted 18 – ( – 7 ) and came up with an answer of 25 grams. Is Edna correct? Why or why not? Yes, Edna is correct. No. The answer should have been – 25 grams, not 25 grams, because the mass of the solid decreased. No. Edna should have added 18 + ( – 7 ) because she needed to add the initial mass and the change in mass. Submit
Thermodynamics deals with forms of energy and change in the total energy of a system which can be assigned a value of zero at some reference point. The total energy of a system has two groups: macroscopic and microscopic. Describe the concept of macroscopic and microscopic forms of energy in a thermodynamics system. (d) A quantity of matter or a region in space chosen for study is referred to system. Some thermodynamics relations that are applicable to closed and open systems are different. It is extremely important to recognize the system before start analyzing it. Thus, differentiate among following thermodynamics systems. (i) Isolated system; (ii) Rigid system; and (iii) Adiabatic system.
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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?
The table below shows the melting point, specific heat, and heat of fusion of different solids. Suppose the same mass of these solids are at their respective melting point temperatures, which solid requires most amount of heat to melt? Substance Melting Point Heat of Fusion Specific Heat 79.71 cal/g 5.85 cal/g 21.07 cal/g 15.39 cal/g 31.98 cal/g 0.50 cal/gC° 0.033 cal/gC° 0.056 cal/gC° 0.030 cal/gCo 0.093 cal/gC° Ice 0°C Lead 327°C Silver 961°C Gold 1063°C Copper 1083°C O lead ice O gold O silver O O O O

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