How long does it take to build a rocket? A ‘simple’ rocket, like the falcon 9 from SpaceX, may take 18 months to make, but one that can take people into outer space, like the shuttle, can take 5 years to make, start to finish. What is a 2 stage rocket? A two-stage-to-orbit (TSTO) or […]
What are two major uses of a classification system for abnormal behavior?
What are two major uses of a classification system for abnormal behavior? We need a classification system for abnormal behavior for two primary reasons. First, a classification system is useful to clinicians, who must match their clients’ problems with the form of intervention that is most likely to be effective. Second, a classification system must […]
What is the strongest crystal structure?
What is the strongest crystal structure? Diamond is the hardest material known, defining the upper end of the 1-10 scale known as Moh’s hardness scale. Diamond cannot be melted; above 1700 °C it is converted to graphite, the more stable form of carbon. The diamond unit cell is face-centered cubic and contains eight carbon atoms. […]
How do you measure for built in bookshelves?
How do you measure for built in bookshelves? Measure the horizontal width of the wall space for the bookshelves. If the area is beside a window, door or other architectural feature, measure at the narrowest point, where the trim on the wall sticks farthest into the bookshelf space. What would you use to measure a […]
What problems are created by rapid urbanization quizlet?
What problems are created by rapid urbanization quizlet? The rapid growth of cities forced people to contend with problems of housing, transportation, water, and sanitation. What causes a population shift from rural to urban areas in the late 1800’s quizlet? What were the main causes of population growth in American cities in the late 1800’s? […]
What has more water lakes or rivers?
What has more water lakes or rivers? By comparison, freshwater comprises only 3% of the earth’s water, and surface water is only 0.3% of that 3%. Furthermore, rivers and lakes comprise 2% and 87%, respectively, of surface water. Thus, rivers contain only 0.00018% and lakes only 0.0078% of the earth’s water. Who has the most […]
What is a food chain explain with diagram?
What is a food chain explain with diagram? A food chain is a linear diagram showing how energy moves through an ecosystem. It shows only one pathway out of the many possibilities in a specific ecosystem. What are the 4 food chains? Once students understand, have them draw the sun, a producer, a primary consumer, […]
What type of reaction is Ca OH 2 Heat?
What type of reaction is Ca OH 2 Heat? Among widely recognizable exothermic reactions is the combustion of fuels (such as the reaction of methane with oxygen mentioned previously). The formation of slaked lime (calcium hydroxide, Ca(OH)2) when water is added to lime (CaO) is exothermic. How many different elements are involved in the chemical […]
How do you test a hypothesis in an experiment?
How do you test a hypothesis in an experiment? How to Test Hypotheses State the hypotheses. Every hypothesis test requires the analyst to state a null hypothesis and an alternative hypothesis. Formulate an analysis plan. The analysis plan describes how to use sample data to accept or reject the null hypothesis. Analyze sample data. Interpret […]
What are the four bases in DNA?
What are the four bases in DNA? Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), or thymine (T). Which of these is are pyrimidines ?\? While thymine, cytosine, and uracil are all pyrimidines, only thymine and […]