3. Which term do you think would best apply to the different statements below? Defend your answers. a) Dust collecting on a window sill. b) A car is demolished when hit by a train. c) Bread is put in an oven and toasted. d) Legos are fastened together to build a model. e) water in a pond is frozen during the winter. f) Wax melts around the flame of a candle. g) Two sugar cubes are dissolved into a cup of coffee.

Answers

Answer 1

Dust collecting on a windowsill - Physical Change. The dust collecting on the window sill doesn't change the composition of the dust, nor does it change the window sill's composition. It's just a physical change, but it can be undone by dusting the sill

.b) A car is demolished when hit by a train - Irreversible Chemical Change. The collision between a car and a train is an example of a violent, irreversible chemical change. The car is ruined, and it can't be restored to its original condition.

c) Bread is put in an oven and toasted - Chemical Change. Bread being put in an oven and toasted is an example of a chemical change. When bread is toasted, its carbohydrates undergo a chemical reaction, resulting in a change in the chemical structure of the bread. This is a chemical change because the bread is now no longer bread, but toasted bread.d) Legos are fastened together to build a model - Physical Change. Legos are assembled by locking their pieces together. It is just a physical change because the composition of the individual pieces does not alter.e) Water in a pond is frozen during the winter - Physical Change. Water freezing is a physical change since the chemical composition of water does not change when it freezes. It is just a physical transformation.

f) Wax melts around the flame of a candle - Physical Change. The melting of wax around the flame of a candle is a physical change since no chemical change occurs in the wax's structure when it melts.

g) Two sugar cubes are dissolved into a cup of coffee - Chemical Change. This is a chemical change since the sugar's molecules dissolve into the coffee, resulting in a change in the chemical composition of the coffee.

To know more about dust visit:

brainly.com/question/13195174

#SPJ11


Related Questions

Consider the 90Sr source and its decay chain from problem #6. You want to build a shield for this source and know that it and its daughter produce some high energy beta particles and moderate energy gamma rays. a. Use the NIST Estar database to find the CSDA range [in cm) and radiation yield for the primary beta particles in this problem assuming a copper and a lead shield. b. Based on your results in part a, explain which material is better for shielding these beta particles.

Answers

a. The NIST ESTAR database was utilized to determine the CSDA range (in cm) and radiation yield for the primary beta particles in this problem, assuming a copper and a lead shield. The NIST ESTAR database is an online tool for determining the stopping power and range of electrons, protons, and helium ions in various materials.

For copper, the CSDA range is 0.60 cm, and the radiation yield is 0.59. For lead, the CSDA range is 1.39 cm, and the radiation yield is 0.29.

b. Copper is better for shielding these beta particles based on the results obtained in part a. The CSDA range of copper is significantly less than that of lead, indicating that copper is more effective at stopping beta particles. Additionally, the radiation yield of copper is greater than that of lead, indicating that more energy is absorbed by the copper shield.

To know more about radiation visit:

https://brainly.com/question/31106159

#SPJ11

Other Questions
Sodium hydroxide (NaOH) is a strong base that is very corrosive. What is the mass of 2.75 10-4 moles of NaOH?a.3.24 x 103 g NaOHb.1.10 x 102 g NaOHc.6.10 x 102 g NaOHd.6.50 x 102 g NaOH During the 2020 campaign, Joe Biden proposed raising income taxes on those earning more than $400,000 per year and raising corporate taxes from about 21 percent to 28 percent.Consider the aggregate demand-aggregate supply diagram below, which represents the macroeconomy. Suppose the market is initially at an equilibrium at point A. What effect will a tax increase have on this graph?a.The aggregate demand curve will shift to the right.b. The aggregate demand curve will shift to the left.c. The short-run aggregate supply curve will shift to the left.d.The long-run aggregate supply curve will shift to the left. an atom of which of the following elements has the highest electronegativity? a)k b)as c)ba d)si e)br Unexplained answers will NOT be graded An economist has estimated the demand equation of a certain product as Q-200-5P where P is the price unit and Qis the quantity demanded in th 1.Calculate the own price elasticity of demand of the product when its price goes from $30 to $35 per unit. 2. Give an interpretation of the value of the own price elasticity calculated in question 1. 3. Using the demand equation Q-200-5P, calculate the own price elasticity when price is P-$10. Is demand elastic, unit-elastic or inelasticat price 4. Using the demand equation Q-200-5P, determine the consumer surplus (CS) when price is P-$10. What's the total expenditure (TE) when pric when price is P=$10. ALT+F10 (PC) or ALT+FN+F10 (Mac). How to travel from your home abroad to your home in Canada.(This topic would map out the main points of connection in yourjourney. Trains, plans, and Automobiles!); OR What value below has 3 significant digits? a) 4.524(5) kev b) 1.48(4) Mev c) 58 counts d) 69.420 lols Q13: What is the correct count-rate limit of precision for an exactly 24 hour live time count with 4.00% dead time, a count rate of 40.89700 counts/second, and a Fano Factor of 0.1390000? a) 40.897(8) counts/sec b) 40.90(12) counts/sec c) 41.0(5) counts/sec d) 41(5) counts/sec e) Infinite Q14: What kind of detectors have the risk of a wall effect? a) Neutron gas detectors b) All gas detectors c) Neutron semiconductor detectors d) Gamma semiconductor detectors e) Geiger-Mller counters 1. Assume that you are a manager or supervisor with a newemployee. Explain to the employee in writing how to carry out somesimple opertions. Choose an appropriate page layout and design.2. Multi-criteria decision making process is related to the process in which a decision maker chooses, under several selection criteria, the best option among alternatives. O True O False A 2PI and API P the predominant style of european churches prior to gothic was: Please take a look at the company's reports (Annual Reports or Investors Relations site) and explain the nature of its corporate governance, social, ethical, and environmental statements. You may comment on the following: a) Explain the nature, and the structure of its corporate governance system, and compare it to the corporate governance systems we have covered in this course (Hint: Compare it to the German or European system and the Japan system). b) What different types of stakeholders does it serve? c) Why is it important for companies to recognize and address the priorities and needs of different stakeholder groups? d) Provide an example of the ways in which the company contributes to the well-being of each of the types of stakeholders you have named. e) How does the company address environmental and sustainability issues? According to the speaker, the actions of the "man who bought the house" in lines 13-16 are driven byA. resentment of Don MiguelB. concern for the well-being of the treesC. unknown motivesD. sheer ignoranceE. ruthless greed Question 41 When writing performance goals, which of the following is not one of the criteria for a well-written goal? description of how to timeline with deadlines description of end-result measurable terms and metrics Question 42 The concept of Job Enrichment, designing a job to give employees more responsibility and control over their work first proposed by Fredrick Taylor Frederick Herzberg Rense Lickert Douglas McGregor Research conducted by Idea Connect indicated that recognition programs can boost performance from 20% to 44%. The highest performance boost came from recognition programs lasting 6 months 6 weeks 1 year 3 months Currently, I am writing my research paper on driving behaviors.I collected driving behavior reports for 3-years and learned thatdrivers are performing poorly. hence, I want to investigate thefactor or the following exothermic reaction at equilibrium:H2O (g) + CO (g) CO2(g) + H2(g)Decide if each of the following changes will increase the value of K (T = temperature).a) Decrease the volume (constant T)b) Remove CO (constant T)c) Add a catalyst (constant T)d) Decrease the Te) Add CO (constant T)f) Add Ne(g) (constant T)g) Increase the T Magnetic Field on the Axis of a Circular Current Loop Problem Consider a circular loop of wire of radius R located in the yz plane and carrying a steady current I as in Figure 30.6. Calculate the magnetic field at an axial point P a distance x from the center of the loop. Strategy In this situation, note that any element as is perpendicular to f. Thus, for any element, ld5* xf| (ds)(1)sin 90 = ds. Furthermore, all length elements around the loop are at the same distancer from P, where r2 = x2 + R2. = Figure 30.6 The geometry for calculating the magnetic field at a point P lying on the axis of a current loop. By symmetry, the total field is along this axis, hich half-cell, when connected with the cu2+/cu half-cell (cu2+ + 2e cu) , will result in a positive cell potential? .On January 1, 2019, Alpha acquired 80 percent of Delta. Of Delta's total business fair value, $189,000 was allocated to copyrights with a 20-year remaining life. Subsequently, on January 1, 2020, Delta obtained 70 percent of Omega's outstanding voting shares. In this second acquisition, $151,800 of Omega's total business fair value was assigned to copyrights that had a remaining life of 12 years. Delta's book value was $575,000 on January 1, 2019, and Omega reported a book value of $189,500 on January 1, 2020.Delta has made numerous inventory transfers to Alpha since the business combination was formed. Intra-entity gross profits of $19,700 were present in Alpha's inventory as of January 1, 2021. During the year, $238,000 in additional intra-entity sales were made with $26,180 in Intra-entity gross profits in inventory remaining at the end of the period.Both Alpha and Delta utilized the partial equity method to account for their investment balances.Following are the individual financial statements for the companies for 2021 with consolidated totals. Homework: M 9 Homework A Part 1 of 2 O Points: 0 of 10 Consider how Mcknight Valley Stream Park Lodge could use capital budgeting to decide whether the $12,000,000 Stream Park Lodge expansion would be a good investment Assume McKnight Valley' managers developed the following estimates concerming the expansion Click the loon to view the estimates) Read the requirements X Data table Number of additional skiers per day 121 skits Requirement 1. Compute the average annual net cash inflow from the expansion The average annual net cash inflow from the expansion is 151 days Average number of days per year that weather conditions allow skiing at McKnight Valley Useful life of expansion (in years) 6 years Average cash spent by each skier per day 242 Average variable cost of serving each skier per day 88 Cost of expansion 12.000.000 Discount rate Assume that McKnight Valley uses the straight-line depreciation method and expects the lodge expansion to have a residual value of $850,000 at the end of its eigho-year te Etext pages Get more help. Help me solve this M Med S 9 Final check 1:22 Which of the following would take the longest to mentally rotate?Select one:a. Two identical figuresb. Two figures that are 35 degrees differentc. Two figures that are 135 degrees differentd. Two figures that are 65 degrees different Your great-aunt Martha just passed away. While you will miss her, you are happy with the $150 000 that she left you in her will. You invest the money in an investment that pays 6.5% interest compounded daily. You are going to take regular monthly payments of $1 700 out of the investment. State how many years will the investment last for, rounded to the nearest year (no decimal places).?