Numerade

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A horizontal supply curve is perfectly elastic. True False A horizontal supply curve is perfectly elastic. True False

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1. Find the vector, parametric and symmetric equations of the line lying on the planes 7 $ x+y-z=2 $ and $ 3 x-4 y+5 z=6 $.

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Find the Lagrangian, the Action, and the equation of motion in special relativity for a free particle with mass m and velocity v. References: (a) The Classical Theory of Field by Landau and Lifshitz, (b) Classical Mechanics by Goldstein, Poole, and Safko; or (c) Classical Dynamics by Thorton and Marion.

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A baseball catcher is performing a stunt for a television commercial. He catches a falling baseball of mass 0.25 kg in his glove. If the glove exerts an average force of 1000 N on the ball and the ball stops in 0.02 s while in the hand of the player, what was the height from which the ball was dropped? During an evening, a truck is driving along a straight, level road at 25 m/s. The driver panics when a deer runs onto the road and he locks the wheels while braking. The truck slide 50 m before it stops. The coefficient of kinetic friction for the wheel/road interface is

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QUESTION 2 [3+3+4+8+5=23 Marks] High voltage testing of transformers plays a vital role in ensuring the durability of their insulation against transient overvoltage resulting from switching operations and lightning strikes. Inadequate design in this regard could lead to extensive and expensive power disruptions in case of failure. (a) What are the observations that can be made during insulation resistance testing of transformers? (b) Besides insulation resistance testing, list three (3) other electrical tests that can be conducted on a transformer to assess its condition. (c) With the aid of appropriate diagrams, briefly describe partial discharge in dielectrics. (d) The circuit diagram for Schering bridge is shown in Figure Q2d. Both ends of the sample and the standard capacitor are connected to the high voltage side of the bridge. Show that at balanced condition, $\tan \delta = \omega CR_4 R_1$ (e) It is required to set up the Schering bridge to make measurement at 250Hz on samples of insulation that have capacitances in the range 300pF and loss tangent of up to 0.025. The fixed components that are available are a loss free standard capacitor of 300 pF and a standard resistor of 0.11M $\Omega$. determine what other components are required for the bridge circuit.

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Question 1: Ideal Otto Cycle Consider an idea Otto cycle with intake pressure of 120 KPa and 300 K. 850 KJ/Kg of heat added to the air-fuel mixture during the constant-volume heat-addition process. Consider compression ratio of 7 in the I.C cycle. Referring to figure 1, determine the following: A) Find the internal energy at all states $u_1$, $u_2$, $u_3$ and $u_4$ B) Cycle maximum temperature. C) Cycle maximum Pressure. D) Net output work. E) Thermal efficiency. $P$, kPa 3 Isentropic $q_{in}$ 2 4 $q_{out}$ Isentropic 120 1 $V_2 = V_3 = \frac{1}{7}V_1$ $V$ $V_1 = V_4$ Figure 1: P-V diagram of Ideal Otto Cycle

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If analysis of skeletal remains shows that lead-210 has undergone 3.47 half-lives, how old is the skeleton? The half-life of lead-210 is 22.3 years. Your Answer: Answer units

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A company expects to pay a $2.50 dividend starting next period for a total of 6 years. If the required return is 8%, what should the stock be trading at today?

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$C_{P_A} = 50 \text{ J/mol \cdot K}$ \newline $H_A^0 = -20 \frac{kJ}{mol} \text{ at 300 K}$ \newline $k = 0.1 \frac{dm^3}{mol \cdot min} \text{ at 300 K}$ \newline $C_{P_B} = 100 \text{ J/mol \cdot K}$ \newline $H_B^0 = -30 \frac{kJ}{mol} \text{ at 300 K}$ \newline $E = 15,000 \text{ J/mol (activation energy)}$

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Cardiovascular Case Histories Herself, besides, I have to do 24 rotations and I'm sure to learn something from each one. I can't wait to get started next week," Ann reported to the OB/GYN unit the following Monday. Dr. Johns was the attending physician in OB/GYN and would take the lead on all the cases they would see. Dr. Johns addressed the rotation cohort. "We've got lots of patients to see today, so stay on your toes and keep up. Our first patient is Brittany Lam." Dr. Johns told the group that Brittany was 36 years old and 35 weeks pregnant. She was experiencing sudden episodes of rapid heartbeat, shortness of breath, and dizziness. Although some shortness of breath is common with pregnancy, Dr. Johns wanted to be sure that everything was okay, especially because arrhythmias with pregnancy can be serious. Dr. Johns asked the interns what tests they thought they should run. Steve, a fellow intern, suggested an ECG. "Correct," replied Dr. Johns. Brittany was sent to the cardiology unit for her ECG and had some blood drawn. The team awaited the results. Dr. Johns told the interns that whoever correctly diagnosed Brittany and determined a treatment plan would get to assist with Mrs. Smith's delivery later that week. It might not be heart surgery, but delivering a baby on your first week sounded like a great start to Ann. That evening in the break room, the group of interns got to work. First, they went over the basics of an ECG. -eiectrbcardibaram ECG is an abbreviation for what cardiovascular test? Type answer as one word. (1 point) 2. What does an ECG measure? Mark all that apply. (2 points) - Electrical activity in atrial muscle - Electrical activity in ventricular muscle - Contraction of the atrial muscle - Contraction of the ventricular muscle - Relaxation of the atrial muscle - Relaxation of the ventricular muscle 3. The ECG activity is created by 4 areas of autorhythmic cells in the heart muscle that initiate the electrical impulses that cause cardiac muscle contraction. These cells are considered autorhythmic because, unlike skeletal muscle, they do not need to be stimulated by the nervous system structures in order to depolarize. Name the structures. Type answer as 1 word (1 point) Which part of these autorhythmic cells is considered the intrinsic pacemaker of the heart? Type answer as 2 words separated by one space. The abbreviation is also acceptable for the first word. (1 point)

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michele c.