True Or False: Most Conducting Materials Have Different Resistances At Different Temperatures. Most conducting materials have different resistances at different temperatures. True or False? Answer: True. Explanation Temperature is one of the factors that determine resistance in a conductor. The hotter the conductor, the more resistance. The colder the conductor is, the less resistance it …
What is the maximum number of electrons in an atom that can have the following quantum numbers? (a) n=2; (b) n=3 and ℓ =1; (c) n=3 and and ℓ =1 and mℓ =0; (d) n=3 and and ℓ =1 and mℓ =-1 and ms = -1/2; Answer: Part (a): 8 electrons; Part (b): 6 electrons; …
Which of the following are assumptions for the Significance Test for the Proportion? Data is Categorical; Data is from a convenience sample; Data is from a Normal Distribution nPo and n(1-Po) are both greater than 15 Data is Quantitative. Data is from a random sample. nphat and n(1-phat) are both the greater than 15 Answer: …
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It is estimated that over ___________% of all crashes in the u.s. are caused by driver distraction. 75 25 50 10 Answer: It is estimated that over 50% of all crashes in the u.s. are caused by driver distraction. Explanation Any activity that diverts your attention away from the task of safe driving, including talking …
A) An FM radio station broadcasts at a frequency of 101.3 MHz. What is the wavelength (m)? B) What is the frequency (Hz) of a sound source that produces the same wavelength in 20 C air? Answer: A) λ = 2.96 m B) f = 116 Hz Explanation For part A) The wavelength is calculated …
An FM Radio Station Broadcasts at a Frequency of 101.3 MHz. What is The Wavelength? Read More »
What is the next value 1 I 2 L 3 F 4 Answer: The next value is “E”. Explanation The general pattern is number-letter-number-letter and so on. Hence, the next character in the given sequence is a letter. Looking at the design of the letters, “I” is made up of 1 line, “L”, is made …
A person’s bac will go down if they: a. drink coffee b. take a cold shower c. vomit d. none of the above Answer: d. None of the above. Explanation For those who are wondering whether vomiting, drinking coffee, or taking a cold shower reduces the amount, they are sadly mistaken. If a person consumes …
Before you have work done on your vehicle, ______________. talk at length with the mechanic be prepared to spend an inordinate amount of time waiting find out if the dealer has a vehicle you can drive temporarily get a detailed estimate Answer: Before you have work done on your vehicle, get a detailed estimate. Explanation …
Before you have work done on your vehicle, ______________. Read More »
What was the social impact of the decision in Brown v. Board of Education? It established the idea of the “separate but equal.” It ruled segregation violated the rules of the Constitution. It created laws to make separate facilities equal for all races. It generated interest in the link between grades and emotions. Answer: The …
What was the social impact of the decision in Brown v. Board of education? Read More »
While standing still on a basketball court, you throw the ball to a teammate. Why do you not move backward as a result? Is the law of conservation of momentum violated? Answer: The law of conservation of momentum is not violated. Explanation When you stand on a basketball court and push the ball to the …
While standing still on a basketball court, you throw the ball to a teammate Read More »
If you don’t know how much alcohol is in a drink, you can: A. Ask the person who poured it B. Throw it out and make another one C. Both A and B D. Neither A nor B Answer: C. Both A and B. If you don’t know how much alcohol is in a drink, …
If you don’t know how much alcohol is in a drink, you can: Read More »
When iron rusts, solid iron reacts with gaseous oxygen to form solid iron (III) oxide. Write the balanced chemical equation for this reaction. Answer: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(aq) Explanation Write the unbalanced equation with the correct formulas and states. Unbalanced Reaction: Fe(s) + O2(g) → Fe2O3(aq) Use the following steps to balance the …
When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(III) oxide. Read More »
When conducting a significance test in practice, how should you choose the alpha level? Use a larger alpha when the consequences of mistakenly rejecting the null hypothesis are more serious. Always use alpha=0.05 since it’s the most appropriate for every situation. Always use alpha=0.05 since it’s the most commonly used one. Use a smaller alpha …
When conducting a significance test in practice, how should you choose the alpha level? Read More »
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 …
Classify each substance as a strong acid, strong base, weak acid, or weak base Read More »
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 …
The point of maximum profit is the point at which the marginal cost equals the Read More »
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: …
What is the potential at a point that is 25% of the way from one particle to the other? Read More »
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 …
Which of the following is not a distortion in perception? Read More »
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 …
For specific guidelines on your vehicle’s maintenance, make sure to ___________. Read More »
