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kayla davis

kayla d.

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Which of the following formula and name combinations is incorrect? aluminum hydroxide Al(OH)3 nickel (Il) chloride NiCl magnesium carbonate MgCO3 potassium nitrite KNO barium sulfite BaSO4

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3. Which of the following is a true statement if $\Delta H = -95$ kJ? A. Both the system and the surrounding are gaining 95 kJ of energy. B. Both the system and the surrounding are losing 95 kJ of energy. C. The system is gaining 95 kJ of energy, while the surroundings are losing 95 kJ of energy. D. The system is losing 95 kJ of energy, while the surroundings are gaining 95 kJ of energy. E. None of the above statements are true.

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An iceberg in the ocean floats with one-eight of its volume above the surface. Unit wt. of ocean Water = 64.0 lb/What portion of its volume would be above the surface if the iceberg was floating in pure water?

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Which statement about gender differences in alcohol use disorder is FALSE? Multiple Choice Women with alcohol use disorder have higher death rates from cirrhosis than men with alcohol use disorder. Men tend to develop alcohol use disorder at older ages compared to women. Women are less likely than men to seek early treatment for drinking problems. Men account for the majority of alcohol-related injuries in the United States.

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Q. 6. The arm is rotating at a rate of $\dot{\theta} = 5$ rad/sec when $\ddot{\theta} = 2$ rad/sec$^2$ and $\theta = 90^\circ$. Determine the normal force it must exert on the 0.7 kg particle if the particle is confined to move along the slotted path defined by the horizontal hyperbolic spiral $r\theta = 0.2$ m.

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A 70-kg astronaut floats at a distance of 10 m from her 50000 kg spacecraft. a.What is the force of attraction between the astronaut and spacecraft? b. Assuming that this force remains constant, she is initially at rest, and she has no other means of approaching the spacecraft, how much closer will she be in one hour?

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Find the limit, if it exists. (If an answer does not exist, enter DNE.) \lim_{x \to -5} \frac{|x + 5|}{4x + 20}

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A: An excel sheet that includes two ECG signals (ECG12) can be found on the website. This is a recording of two subject's ECG with sampling rate of 200Hz. Note that meaningful ECG signal frequency lies below 100Hz, so Nyquist rate is met properly. a. Import the signals to Matlab and plot them as a function of time. b. Note that $t = n \times ts$ where $ts$ is the time elapsed between two samples (1/sampling rate) c. Count the number of peaks in each signal. Find the average heart rate in #beats/minute for each subject. You may code this or manually count if you are not comfortable with coding. d. Plot the first 200 points of the signals to visualize the ECG signal of two people. e. Note the nonstationary nature of the signals. Explain what that means. f. Correlate the two signals using xcorr, scale the amplitude properly and plot it. g. Use 'corrcoef' function to display a quantitative measure of similarity of the two ECG signals. The matrix $[a \ b; c \ d]$ shows the similarity. You are interested in elements b and c only. Please see help to learn more.

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QUESTION 2 In an uniform B-field of 5.30 mT as shown, an electron experiences a magnetic force with a magnitude of 2.70 x 10$^{-15}$ N. The mass of an electron is 9.109 x 10$^{-31}$ kg What are: a) the electron's speed? m/s) b) the radius of electron's circular path? in mm) c) the period of the motion? (Express your answer with 3 significant figures and in Mm/s, 10$^6$ (Express your answer with 3 significant figures and (Express your answer with 3 significant figures and in ns)

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QUESTION 2 The combustion in a Diesel cycle is 82% efficient and 17% of the heat of combustion is lost during combustion. Assume constant specific heats $c_v = 0.718 \text{ kJ/kgK}$ and $c_p = 1.005 \text{ kJ/kgK}$. If the heating value of diesel fuel is 43,159 kJ/kg of fuel, What is the air fuel ratio (AF) if the temperatures before and after combustion are 559 K and 1,761 K?

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