Find the exact length of the curve. Use a graph to determine the parameter interval. r=cos2(θ/2) Answer: 4 Explanation Blue graph: One full figure is completed from 0 < θ < π Let’s use symmetry and double the integral from 0 to π. This avoids the problem of getting a 0 answer (like problem 49) …
Due to synergism, if you take two depressants together, it may be the same as taking __________. Answer: Due to synergism, if you take two depressants together, it may be the same as taking three. Explanation When taking two depressants together, it may have the same affect as taking three depressants due to synergism.
Classify each substance as a strong acid, strong base, weak acid, or weak base. HCCOH HClO4 HI NH3 NaOH HNO2 CH3COOH (CH3)2NH HNO3 Ca(OH)2 HCl KOH HCN HF CH3NH2 CsOH HBr LiOH Ba(OH)2 H2SO4 Answer HCCOH Weak Acid HCIO4 Strong Acid HI Strong Acid NH3 Weak Base NaOH Strong Base HNO2 Weak Acid CH3COOH Weak …
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The point of maximum profit is the point at which the marginal cost equals the: A. marginal revenue. B. market price. C. total revenue. D. production cost. Answer: The point of maximum profit is the point at which the marginal cost equals the marginal revenue. Explanation Maximal profit is obtained when the marginal cost equals …
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The electric potential at a point that is halfway between two identical charged particles is 300 V. What is the potential at a point that is 25% of the way from one particle to the other? Answer: V2 = 400V Explanation We can start a solution with expression for the potential of a point charge: …
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Which of the following is not a distortion in perception? A. Cognitive dissonance (Pygmalion effect) B. Stereotyping C. Halo effect D. The recency effect E. Causal attribution Chapter 11, Problem 119MCQ Answer: Pygmalion effect is not a distortion in perception. Explanation The Pygmalion effect is a psychological phenomenon in which the performance of another person …
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For specific guidelines on your vehicle’s maintenance, make sure to ___________. Answer: For specific guidelines on your vehicle’s maintenance, make sure to refer to your owner’s manual. Explanation When you require specific guidelines on your vehicle’s maintenance, then it’s best to refer to your owner’s manual as it will contain the most precise guidelines for …
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You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly 1/16 of the polonium remains. What is the corresponding half life (T sub 1/2) of polonium? Answer: 112 minutes Explanation After 14.0 minutes, exactly 1/16 of the polonium remains. 14 minutes – 1/16 remaining. Multiply each side by 8: …
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From which end (North or South) of a bar magnet do magnetic field lines emerge? North or South? Do the field lines really start at the pole face?-Yes or No? Do magnetic field lines ever start or end anywhere? Yes or No? Answer Magnetic field lines emerge from the North and point towards the South. …
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When driving, we get ___________ of the information we need from our eyes? 20% 35% 70% 90% Answer: 90% Explanation About 90% of the information required to drive comes from our eyes. That is why, when driving, we get 90% of the information we need from our eyes.
What are the expected bond angles of ICl4+? Choose all that apply: a) 90 degrees b) 109.5 degrees c) 120 degrees d) 180 degrees Answer: A, C, D. Explanation It has a see-saw shape and thus will have bond angles of 90, 120 and 180. Thus A, C, D. The polyatomic ion has seven valence …
Which operation could we perform in order to find the number of milliseconds in a year? 60 60 24 7 365 1000 60 60 24 365 24 60 100 7 52 1000 60 24 7 52? Answer: 1000 60 60 24 365. 1 year = 365 days = 1000 * 60 * 60 *24 *365 ms Explanation We need …
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The biggest danger of relying on case-study evidence is that it: A) is based on naturalistic observation. B) may be unrepresentative of what is generally true. C) overestimates the importance of operational definitions. D) leads us to underestimate the causal relationships between events Answer: B) may be unrepresentative of what is generally true. The biggest …
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What determines the value of an item? (A) the amount of goods that are produced (B) the capital required to build the factory (C) the unlimited wants of the consumers (D) the resources consumed in production Answer: the amount of goods that are produced. The amount of goods that are produced determines the value of …
Which of the following is a key factor that influences BAC? a. Height b. Eating certain foods c. Body weight d. All of the above Answer: Body Weight. Body Weight is a key factor that influences BAC. Explanation BAC stands for Blood Alcohol Content. The BAC is influenced by the amount of alcohol you drink, …
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The ___________ is a plane perpendicular to the optic axis through the focal point. Optic axis focal point light ray paraxial ray approximation focal plane Answer: focal plane. The focal plane is a plane perpendicular to the optic axis through the focal point.
Since the rise of his designs, Frank Lloyd Wright _______ an icon of modern architecture. has become became becomes had become would become Answer: Became Explanation: The Rise of Frank Lloyd Wright’s designs refer to something that happened in the past and thus we will need to use some statement in the past tense. The …
Which of the following is true about energy drinks and mixers: a. carbonation generally slows the rate of alcohol absorption b. a sweet taste can hide the taste of alcohol c. caffeine helps keep the person aware of how intoxicated he or she is d. all of the above? Answer: b. a sweet taste can …
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