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danielle ewing

danielle e.

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A 120-g ball is moving at 7 m/s when it is hit by a bat, causing it to reverse direction and have a speed of 18 m/s. What is the change in the magnitude of the momentum of the ball?

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How much ethylene glycol must be added to 0.9 LL of water to keep it from freezing at -14 degreeFdegreeF ? The Kf value is 1.86 degree C/molal. Explain how you determined your answers.

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8. [0/6 Points] DETAILS MY NOTES MENDSTATC4 5.E.011. PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOT Let X be a binomial random variable with n = 10 and p = 0.3. Find the following values. (Round your answers to three decimal places.) (a) P(X = 2) 0.267 (b) P(X ? 2) (c) P(X > 2) (d) P(X ? 2) (e) $\mu = np$ $\mu = $ (f) $\sigma = \sqrt{npq}$ $\sigma = $

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Complete the balanced neutralization equation for the reaction below: \[ \mathrm{HCl}(\mathrm{aq})+\mathrm{NaOH}(\mathrm{aq}) \rightarrow \]

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Q3: Understanding Data Correlation describes a relationship between two datasets. It is essential to understand your data in order to take the most appropriate decision in your business. Accordingly, you are asked to give a scenario for a business that you would like to have in the future. You are then asked to present seven sets of data to show the seven levels of correlations (e.g. the sales of your company: Jan Sales, Feb Sales, Mar Sales, Apr Sales..etc.). Perfect Positive Correlation High Positive Correlation Low Positive Correlation No Correlation Low Negative Correlation High Negative Correlation Perfect Negative Correlation 1 0.9 0.5 0 -0.5 -0.9 -1 However, the following items should be provided: • Seven sets of data (in a table of minimum 10 entries) should be provided to simulate the seven levels of correlations. • The correlation value and the level of correlation should be highlighted for each set of data. • Short conclusion on your finding and how these correlation could help you understanding your data. • Screenshots from the running code and results should be provided in the submitted TMA, Word/Pdf file.

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Coding problem: HW10_2 Chemical reactions often follow the model: $\frac{dc}{dt} = -kc^n$ $t$ 10 20 30 40 50 60 $c$ 3.52 2.48 1.75 1.23 0.87 0.61 where $c$ is the concentration, $t$ is time, $k$ is the reaction rate, $n$ is the reaction order. Given the data in the table at right, first estimate $dc/dt$ using O(h²) formulas (use gradient), then use these values to solve for $k$ and $n$ by linear regression. Plot the curve fit.

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Problem 7. Let be any norm on R^n. Let y ∈ R be continuous and let c ∈ R^n be such that x ≠ y. Show that there exists some ε > 0 so that for all t ∈ [0,1], we have ||tx + (1-t)y - c|| > ε. [Hint: Use ε = ||x - y||/2 and the continuity of ||·|| and y.]

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Which of the following rights is not a right of a copyright holder? The right to reproduce the copyrighted work. The right to distribute the work to the public. The right to perform the work in public. The right to prevent others from producing competitive works. The right to produce new works derived from the copyrighted work.

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e. 11mL of 8.25 x 10?² M BaCl? solution was mixed with 10ml of 9.35 x 10?² M Na?CO? solution. Find the theoretical yield of BaCO?. (Hint: this is a limiting and excess problem) BaCl? + Na?CO? ? BaCO? + 2NaCl 11mL 10mL ? L ? mol 8.25x10?³ BaCl? ? mol mol limiting ? mol product ? ? g product f. A student isolated 0.1989 grams of BaCO?. What is their percent yield for this experiment?

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1) Write up a small program that allows the user to enter the length and width of a rectangle. Multiply these to find the area (area = length \* width). Print out this area. For an extra credit point, make sure the answer is always positive, even if the user gives negative values.

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