Question Solved1 Answer Exercise 14.1 A circuit known as a summer is shown in Figure 14.7. a. Use the ideal- op-amp assumption to solve for the output voltage in terms of the input voltages and resistor values. b. What is the input resistance seen by VA? c. By va? d. What is the output resistance seen by RL?

Q3 (a) A three-phase transmission line has a per phase impedance of 1 2 resistor that is in series connection with 3 2 inductor. The line feeds a balanced A-connected load, with a total reactive power of 5 KVAR and power factor angle of 22.62º. If the line voltage across the load terminal has a magnitude of 240 V: (i) Calculate the magnitude of the line voltage and the phase voltage at the source end. (8 marks) Determine the complex power of the source. (2 marks) (ii) (iii) Calculate the source power factor. (2 marks)

5.21 LAB: Middle item Given a sorted list of integers, output the middle integer. A negative number indicates the end of the input (the negative number is not a part of the sorted list). Assume the number of integers is always odd. Ex: If the input is: 2 3 4 8 11 -1 the output is: Middle item: 4 in C please

7. [2 Points] Suppose that a,b & N and a b. Define a bijection f: {a,b} UN N Explain what the values f(x) are when x = a, when x = b, and when x N. (Assume that N begins with 0.) 7. [2 Points] Suppose that a,b & N and a b. Define a bijection f: {a,b} UN N Explain what the values f(x) are when x = a, when x = b, and when x N. (Assume that N begins with 0.)

A star has a colour index, B-V = +0.31, an apparent V magnitudeof +9.34 and an absolute B magnitude of +2.70. a) What are the apparent B and absolute V magnitudes of thisstar?b) What is the distance to this star (pc) and its parallax(arcseconds)?c) How many times brighter is this star in V than it is inB?d) Define “Bolometric Magnitude” and explain what it physicallyrepresents.

19. Which of the following is not a characteristic of the mean? (a) All the observations are used in its calculation. (b) It is influenced by extreme values. (c) The sum of the deviations from the individual observations and the mean is always greater than zero. (d) all of the above.

1. Find the pressure due to a column of mercury 80 cm high. 2. A rectangular tank 6 x 8 ft is filled with a gasoline to a depth of 80 ft. The pressure at the gasoline is 14.7 psi. Find the pressure at the bottom of the tank and force exerted on the bottom. 3. A 130 lb woman balances on the heel of her right shoe which is 1 in radius. How much pressure does she exert on the ground?4. An amount of heat equal to 2500 J is added to a system, and 1800 J of work is done on the system. What is the change in internal energy of the system? 5. Determine the change in internal energy of 1.0 L of water at 100 deg C when it is fully boiled, which results in 1671 L of steam at 100 deg C. Assume the process is done at atmospheric pressure.