After just one or two drinks: a. people will remain in a state of euphoria if they continue to drink b. alcohol starts to affect the brain c. people can still drive without risk d. both a and b Answer D. both a and b. Because alcohol will start to affect the brain from your …
Write the balanced chemical equation for each reaction. a. Solid copper reacts with solid sulfur to form solid copper(I) sulfide. b. Solid iron (III) oxide reacts with hydrogen gas to form solid iron and liquid water. c. Sulfur dioxide gas reacts with oxygen gas to form sulfur trioxide gas. d. Gaseous ammonia (NH3) reacts with …
Solid Copper Reacts With Solid Sulfur To Form Solid Copper(I) Sulfide. Read More »
What is the meaning and the origin of saying “Amat Victoria Curam”? Answer Amat Victoria Curam is a Latin saying which translates as “Success favors those who take pains” or “Victory Loves Preparation”. It was first used by Gaius Victorius Catullus, a Roman poet who lived in the 1st century BC. In Latin, the term …
What Is The Meaning And The Origin Of Saying “Amat Victoria Curam”? Read More »
How much energy must be removed from a 200 g block of ice to cool it from a 200g block of ice to cool it from 0 °C to -30°C? Answer: Q = -12.7 kJ Explanation This is a straightforward application to the heat equation the negative sign of the result indicates that this heat …
A block oscillating on a spring has a maximum speed of 20 cm/s. What will the block’s maximum speed be if the total energy is doubled? Explain. Explanation The total energy (kinetic+ potential) during motion is constant, equal at any displacement. At x – =, the equilibrium point, where U = 0, v = vmax …
A Block Oscillating On A Spring Has A Maximum Speed Of 20 Cm/S. Read More »
Order these compounds in order of increasing carbon-carbon bond strength and in order of decreasing carbon-carbon bond length: HCCH, H2CCH2, H3CCH3. Answer We need to list these compounds in order of increasing carbon-carbon bond strength and ion order to decrease the carbon-carbon bond length. Let us first draw the Lewis structures of the compounds: 1. …
Order These Compounds In Order Of Increasing Carbon-carbon Bond Strength. Read More »
Which of the following scenarios should be analyzed as paired data? a) Spouses are asked about the number of hours of sleep they get each night. We want to see if husbands get more sleep than wives. b) 50 insomnia patients are given a placebo and 50 are given a mild sedative. Which subjects sleep …
Which Of The Following Scenarios Should Be Analyzed As Paired Data Read More »
I obey the law more often if there is a chance that I might get caught. Not at all true Slightly true Somewhat true Mostly true Very true Answer Not at all true. Not true at all – as you wish. Explanation This question assesses your inclination to follow regulations and rules even if they …
I Obey The Law More Often If There’s A Chance That I Might Get Caught. Read More »
If it takes 42 minutes to load 3 1/2 trucks, how many minutes will it take to load 6 1/2 trucks? Answer: 78 minutes Explanation Let x represent the number of minutes it takes to load 1 truck. We know that it takes 42 minutes to load 3*1/2 trucks. The time it takes to load …
Use the Midpoint Rule with the given value of n to approximate the integral. Round the answer to four decimal places. ∫2 0 x/x+1 dx, n = 5 Answer: 0.9071 In this case, a = 0, b = 2, n = 5. Find the width of the intervals:
Are good grades in high school associated with family togetherness? A random sample of 142 high school students was asked how many meals per week their families ate together. Their responses produced a mean of 3.78 meals per week, with a standard deviation of 2.2. Researchers then matched these responses against the students’ grade point …
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Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 20.0 kg and box B has mass 5.0 kg. A horizontal force of 250 N is exerted on box A. What is the magnitude of the force that box A exerts on box B? Answer: Fa = 50 N …
Boxes A And B Are In Contact On A Horizontal Frictionless Surface Read More »
Sketch the graph of an example of a function f that satisfies all of the given conditions. lim x→0- f(x)=-1, lim x→0+ f(x)=2, f(0)=1 Answer There are many possible graphs that satisfy the given conditions, I will give three examples. Note that the Limit from the left side must be -1 The functional value, represented …
Sketch The Graph Of An Example Of A Function F That Satisfies Read More »
Explain the difference between an absolute minimum and a local minimum. Answer Local minimum is the smallest value that a function has on some open interval (which is part of domain). Absolute minimum is the smallest value that a function has on its entire domain. Note: Local minimum can be reached in just one point. …
Explain The Difference Between An Absolute Minimum And A Local Minimum. Read More »
How many unpaired electrons are present in the ground state of an atom from of the following groups? (a) 4A(14), (b) 7A(17), (c) 1A(1), (d) 6A(16) Answer A) In the group 4A there are 2 unpaired electrons in the ground state. B) In the group 7A there is 1 unpaired electron in the ground state. …
Prokaryotes are classified as belonging to two different domains. What are the domains? Answer The two domains to which Prokaryotes belong are the Bacteria and Archaea domains. Prokaryotes, which include bacteria and archaea, may be found almost everywhere – in every ecosystem, on every surface of our homes, and even within our bodies! Some live …
Prokaryotes Are Classified As Belonging To Two Different Domains. What Are The Domains? Read More »
Evaluate the indefinite integral as an infinite series. Integral Cosx-1/x dx Answer We evaluate the given indefinite integral as an expression of an infinite series. Here we are going to use the Maclaurin series representation of some functions, and work our way through to obtain a similar pattern of expression. Given the indefinite integral
A car drives over the top of a hill that has a radius of 50 m. What maximum speed can the car have without flying off the road at the top of the hill? Answer: v = 22.147 m/s Explanation r = 50 m The forces acting on the car are the normal reaction of …
A Car Drives Over The Top Of A Hill That Has A Radius Of 50m Read More »
a. How many lone pairs are on the central atom in BCl3? Express your answer numerically as an integer. b. How many lone pairs are on the central atom of BrF3? Express your answer numerically as an integer. Answer: A) None, 0; B) 2. The valence electrons of the chemical elements that are bonding and …
How Many Lone Pairs Are On The Central Atom In BCl3? Read More »
An 8.0-cm-diameter, 400 g solid sphere is released from rest at the top of a 2.1-m-long, 25∘ incline. It rolls, without slipping, to the bottom. a. What is the sphere’s angular velocity at the bottom of the incline? b. What fraction of its kinetic energy is rotational? Answer
