Numerade

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Problem Shown in the figure to the right is a cyclic process undergone by a heat engine. Your heat engine shall use 3.0 moles of nitrogen gas (diatomic). During the process a->b, the pressure rises by a factor of 3.0. $$T_a = 300 K$$ $$P_a = 100,000 Pa$$ Engine Cycle Solution (1) Fill in the State Table (all pressures in Pascals, all volumes in cubic meters, all temperatures in K). Pressure a 100,000 b 300,000 c 100,000 Volume 0.0748 0.0748 0.2245 Temperature 300 900 900 Work a->b 0 (2) Fill in the Process Table (all entries in Joules). Heat 37,413 dU 37,413 b->c 0 c->a -37,413 (3) Find the Totals: Work = Heat = dU = 0 (4) Find the heat input (from "hot reservoir") and the heat output (to "cold reservoir"): Q-hot = Q-cold = (5) Find the efficiency of the engine: efficiency = Viewing Saved Work Revert to Last Response

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As seen in one of the lecture demonstrations, a small cart is rolling at constant velocity on a level track. While moving, the cart shoots a small ball straight up. The cart continues to roll along the track while the ball undergoes projectile motion. Where will the ball land with respect to the cart? (ignore friction and air resistance)

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During this phase, the cell makes an exact copy of its DNA. telophase S-phase of interphase G2 of interphase prophase G₁ of interphase

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What is $E^o_{cell}$ at 25°C for a galvanic cell made of a Cu electrode in a solution that is 1.0 M in Cu$^{2+}$ and an Ag electrode in a solution that is 1.0 M in Ag$^+$? Ag$^+$ (aq) + 1e$^-$ $\rightarrow$ Ag(s) $E^o$ = +0.800 V Cu$^{2+}$(aq) + 2e$^-$ $\rightarrow$ Cu(s) $E^o$ = +0.337 V A. 1.137 V B. 0.463 V C. -0.463 V D. -1.137 V

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Fill in the Blank Question Most invasive pathogens enter the tissues via _____ _____

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A measure of how close the result of an experimental value is to the true value is ________. A Accuracy B Precision C % Error D Uncertainty

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Solve the equation for the initial condition $ p(0)=3 $. (8 marks) e) Briefly define a power series. (2 marks) f) Determine the radius of convergence for the following power series. (5 marks) \[ \sum_{n=1}^{\infty} \frac{(-3)^{n}}{n 7^{n+1}}(x-5)^{n} \]

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N?O? decomposes to form NO? and O? with first-order kinetics and the rate constant, k, equals 5.89 x 10?³? How long does it take for the N?O? concentration to decrease from its initial value of 2.75 M to its final value of 1.85 M? 30.0 minutes 153 minutes 67.3 minutes

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13/21 tasks attempted Aluminum hydroxide, Al(OH)3, can be formed via the reaction: Al³? (aq) + 3OH? (aq) ? Al(OH)? (s) a) What volume (in mL) of 1.55 M NaOH is required to completely react with 25.00 mL of 0.210 M AlCl?? VNaOH: b) What type of reaction is this? Select Reaction Type mL

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3 6 9 ? 12 Question 14 (2 points) ? Saved Listen What are the possible consequences, official and unofficial, of academic dishonesty at Langara? Check all that apply. Loss of friendship Damage to Langara's reputation Decreased value and credibility of your credential Zero on an assignment Failure of a course 15 Suspension Denial of a credential Financial loss

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