Numerade

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Question 63 of 157 Predict the chemical formula for the ionic compound formed by the elements K and S K S • x H2O (s) (l) (g) (aq)

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QUESTION 12 The medical condition due to decreased Vitamin D, in which the bones soften is referred to as: Osteoarthritis Osteomalacia Osteomyositis Osteoporosis

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A ball is thrown from an initial height of 1 meter with an initial upward velocity of 25 m/s. The ball's height $h$ (in meters) after $t$ seconds is given following. $h = 1 + 25t - 5t^2$

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Problem 3. (10 pts) Given an ideal low pass filter, whose frequency response is $H(\omega) = \begin{cases} 1, & \text{if } -2.5 \le \omega \le 2.5, \\ 0, & \text{else.} \end{cases}$ Given the input signal $x(t) = \cos t \cos 3t$, what is the output signal $y(t)$ of the system?

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The monotremes are the ______ group of mammals. smallest most diverse largest

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1. Find an example of a real-life experiment other than the one described above that may be considered an "abuse." What could have been done to avoid the outcome of the experiment? 2. Stopping an Experiment In your opinion, what are some problems that may arise when clinical trials of a new experimental drug or vaccine are stopped early and then the drug or vaccine is distributed to other subjects or patients?

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Question 27 3 points Save Answer Consider a dataframe df_employee defined on the following columns: data = {'ID': [1, 2, 3, 4, 5, 6], 'Name': ['Paolo', 'Tom', 'Michele', 'Mike', 'Laura', 'Paolo'], 'Age': [25, 35, 45, 55, 65, 75], 'Stipend': [50, 60, 70, 80, 90, 100]}. What does the following expression do: df_employee.loc[(df_employee['Name'] == 'Paolo') & (df_employee['Stipend'] > 80)]['Stipend'] / 2 Halves the stipend to all employees named Paolo and older than 80 Doubles the stipend to all employees named Paolo and older than 80 Doubles the stipend to all employees Fail with syntax error

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5. The following shows a system that can be used to convert balanced 60 Hz voltages to other frequencies. The synchronous motor has 4 poles and drives the interconnecting shaft in a clockwise direction. The induction motor has 8 poles and its stator windings are connected to the lines to produce counterclockwise rotating field (i.e. in the opposite direction of the synchronous motor). As shown in the figure the induction machine has a wound rotor with terminals brought out through slip rings. Determine the following: a. The speed at which the motor runs b. The frequency of the rotor voltages in the induction machine

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Q1. Answer the following questions. (a) Explain how steam turbines may be used as prime movers to run generators and produce electricity from solar energy? (5) (b) Explain how power factor affects the system losses in an electric power system? (5) (c) Explain why the diversity factor gives a much accurate representation as compared to the demand factor when multiple groups of consumers are involved? Use numerical example to illustrate your answer. (10)

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(b) An 8255 IC interfaced with the 8086 microprocessor works as an Input-output port as shown in Figure 1. 8 Data Bus 8 Port-A switches 8 A2 A0 Port-B LEDS A3 A1 U2 AS A6 A7 3 ABC 15 8255 74LS138 Y2 14 A15 6 14 Y410 A14 AO G1 5G2A G2B 9 Y7 XXXX Port-C /4 CS PC\textsubscript{0}-PC\textsubscript{3} 7-segment Display Figure 1: Connection diagram of 8255 IC 1. Find the addresses of ports and control register. (3) II. Find the control word. (2) iii. Find the value of N to load on counter for 100 ms delay if clock frequency is 10 MHz. (5) iv. Write an assembly language program to read 8-bit switch pattern; turn on the LEDs with opposite pattern for 30 secs and then with same pattern for 20 secs; to show the number of ON switches on 7-segment display. (10)

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guillermo c.