DHS MSC Countdown 2014

DHS MSC Countdown 2014Prepared by Vishnu, Brian, & KeerthanaRules There will be 84 questions, alternating from math to science. There will also be an approximately equal distribution of biology, chemistry, and physics in the science questions. 45 seconds are allowed to answer each question. Each pair will answer 3 questions. In case the team to buzz in first gets the answer wrong, the right to answer go to his opponent. In case no one gets it right, the audience can answer and no one gets the point.Question 1 MathHow many positive integral divisors does 128 have?Answer - Q18 (divisors)Question 2 BiologyWhat is the name for the condition of dynamic equilibrium attained by a living body?Answer - Q2HomeostasisQuestion 3 MathWhat is the units digit of 3^7821 ?Answer - Q33Question 4 ChemistryWhat is the name for the reaction that creates ammonia from its elemental forms?Answer - Q4Haber ProcessQuestion 5 MathThe complement of angle M is 10 degrees. What is its supplement?Answer - Q5100 (degrees)Question 6 PhysicsIf a 2 kg ball travels at 50 m/s towards a wall and rebounds off it elastically after being in contact with the wall for .2 seconds, how much force did the wall exert on the ball?Answer - Q61000 NQuestion 7 MathBrian has 4 blue socks and 6 green socks in a drawer. What is the least number of socks he must draw, at random, to guarantee having at least 2 of the same color?Answer - Q73 (socks)Question 8 BiologyIf a black cow and a white cow produce offspring with a solid grey coloration, what is the form of genetic inheritance?

Answer - Q8Incomplete DominanceQuestion 9 MathIn the land of Ink, the money system is unique. One Trinket is equal to 4 Blinkets, and 3 Blinkets are equal to 7 Drinkets. In Trinkets, what is the value of 56 Drinkets?Answer - Q96 (trinkets)Question 10 ChemistryA container holds 392 grams of N2 (molar mass = 28 g/mol), 480 grams of O2 (molar mass = 32 g/mol), and no other gases. Assuming that N2 and O2 exhibit ideal behavior, if the total pressure in the container 580 torr, what is the partial pressure of the oxygen?Answer - Q10300 torrQuestion 11 MathAn integer is tripled, then divided by 2 and then reduced by 1. If the result is 11, what was the original integer?Answer - Q118Question 12 PhysicsWhat equation gives the quantities of pressure, temperature, volume and number of moles for a gas that experiences no attractive forces within itself?Answer - Q12Ideal Gas LawQuestion 13 MathMichelle started a stamp collection. She collected 8 stamps the first day. Each subsequent day she collected 8 more stamps than she had collected the previous day. If she collected stamps for 5 consecutive days, how many stamps did she collect in total after 5 days?Answer - Q13120 (stamps)Question 14 - BiologyWhat is the general term for flowering plants?Answer - Q14AngiospermsQuestion 15 MathWhat is the value of 8(-6) + 8(10) - 8(4) ?Answer - Q150Question 16 PhysicsWho came up with the first mathematical laws describing gravity?Answer - Q16Isaac NewtonQuestion 17 MathThe combined number of chickens and rabbits on a farm is 100. There are a total of 260 feet on these animals. How many chickens are there?Answer - Q1770 (chickens) Question 18 - ChemistryIf A and B exothermically react to form C and the reaction is third order with respect to B and first order with respect to A, how many times faster will a reaction be if you halve the concentration of A and quadruple the concentration of B?Answer - Q1832Question 19 MathSaiesha successfully shot 7 free throws in 15 attempts. How many additional successful free throws, without a miss, must she make in order to attain a success rate of 75% ?Answer - Q1917 (free throws)Question 20 - ChemistryStrong acids (ionize/dissociate); weak acids (ionize/dissociate).Answer - Q20Ionize; IonizeQuestion 21 MathIf 3x = 8y and 5y = 15z, what is the value of (x/z)? Express your answer in simplest form.Answer - Q218Question 22 - PhysicsThe acceleration of gravity on a strange planet is 16 m/s^2. If a ball is dropped from a height of 8 meters, what is its velocity when it hits the ground?Answer - Q2216 m/sQuestion 23 MathHow many factors of 72 are perfect cubes?Answer - Q232 (factors)Question 24 BiologyWhat is the name for the organic molecules that make up the fluid bilayer of the plasma membrane?Answer - Q24PhospholipidsQuestion 25 MathA cone and a cylinder are of equal height and have congruent bases. The volume of the cylinder is 30 cubic inches. What is the volume of the cone, in cubic inches?Answer - Q2510 (cubic inches)Question 26 - ChemistryIf 15 drops of .2 M HCl are necessary to neutralize 10 drops of Ba(OH)2, what is its molarity?Answer - Q26.15 MQuestion 27 Math5 workers paint 4 houses in 6 days. Working at the same rate as these workers, how many workers are needed to paint 12 houses in 3 days? Answer - Q2730 (workers) Question 28 PhysicsWhat is the relationship comparing spring constant, force, and distance of spring compression?Hookes LawAnswer - Q28Question 29 MathHow many positive 2-digit integers are factors of both 100 and 150?Answer - Q293 (positive two-digit integers)Question 30 - BiologyThe system of binomial nomenclature used to name organisms was introduced by what scientist?Answer - Q30LinnaeusQuestion 31 MathWhen writing the integers from 1 through 97, how many times is the digit 3 written?Answer - Q3120 (times)Question 32 ChemistryWhat is the atomic number of Neon?Answer - Q3210Question 33 MathWhat is the area, in square inches, of the square inscribed in a circle of radius 10 inches?Answer - Q33200 (square inches)Question 34 PhysicsIf a 50 kg car drives at 10 m/s around a circular track with a radius of 20 meters, what is the centripetal force?Answer - Q34250 NQuestion 35 MathWhat is the probability of getting a sum of 3 when 3 standard dice are rolled? Express your answer as a common fraction. Answer - Q351/216Question 36 BiologyName 1 of the founders of cell theory (there are 3, name any 1 or 2 or 3 if you wanna be like that).Answer Q36Mathias Schlieden

Theodor Schwann

Rudolf VirchowQuestion 37 MathMark has four pairs of trousers, seven shirts, and three jackets. How many different outfits can he put together if an outfit consists of a pair of trousers, a shirt, and a jacket?Answer - Q3784 (different outfits)Question 38 ChemistryName the first four sublevels for electrons in an atom, in order of increasing energy.Answer - Q38s, p, d, fQuestion 39 MathThe mean of one set of five numbers is 13, and the mean of a separate set of six numbers is 24. What is the mean of the set of all eleven numbers?Answer - Q3919Question 40 ChemistryGiven the reaction:4X + 3Y -> 5Z + 2WIf 9 moles of Y and 6 moles of X are used, assuming full yield, how many moles of total substances are there in the end?Answer - Q4015 molQuestion 41 MathIf there are 3 elephants in 5 sausages and 4 zing-zings in 25 sausages, how many elephants would you need to make 8 zing-zings?Answer - Q4130 (elephants)Question 42 BiologyAll vertebrates are members of what phylum?Answer - Q42ChordataQuestion 43 MathThe sum of the digits of a two-digit positive integer is 7. Subtracting 45 from this integer yields another two-digit integer with the same digits, but in reversed order. What is the original integer? Answer - Q4361Question 44 PhysicsCalculate the potential energy of a spring with a spring constant of 35 kN/m when the spring is streched to a displacement of -2 m?Answer - Q4470 kJQuestion 45 MathWhat is the largest integer that is less than the square root of 250?Answer - Q4515Question 46 Physics How many times stronger is the force between a +2 C charge and a -3 C charge 2 meters apart than a +4 C charge and -3 C charge 3 meters apart?Answer - Q469/8Question 47 MathJordan ran 2 miles in half the time it took Steve to run 3 miles. If it took Steve 24 minutes to run 3 miles, using the same rates, how many minutes would it take Jordan to run 5 miles?Answer - Q4730 (minutes)Question 48 BiologyWhat animal from the Galapagos was Darwins most widely cited example of natural selection?Answer - Q48FinchesQuestion 49 MathHaley scored 92, 73, 79, and 87 points on the first four tests of the quarter. There is one test remaining. What is the minimum number of points that Haley must score on the final test in order to have a mean of 80 points for the five tests? Answer - Q4969 (points)Question 50 - ChemistryIn scientific notation to three significant figures, how many atoms are in a mole of atoms?Answer - Q506.02 x 1023Question 51 MathWhat is the sum of the distinct prime factors of 315?Answer - Q5115Question 52 PhysicsHow does the inertia of a body traveling in a straight line on Earth compare with that of an identical body traveling in a straight line on the Moon, assuming that the Moon has a gravitational acceleration approximately of that of Earth?Answer - Q52They are the same

Question 53 MathThe sum of the numerator and the denominator of a fraction is 216. The fraction is equivalent to (2/7). What is the value of the denominator? Answer - Q53168Question 54 - Biology Who championed the evolutionary theory of use and disuse?Answer - Q54LamarckQuestion 55 MathWhat is the sum of the first 10 odd positive integers? Answer - Q55100Question 56 BiologyWhat is the process of comparing genetic makeup of two specimens by placing a DNA sample in agar gel and running a current through it?Answer - Q56Gel ElectrophoresisQuestion 57 MathA square region with side length 1 foot is covered completely with 2-inch by 2-inch square stickers. How many of the stickers are needed to cover the region exactly without overlap? Answer - Q5736 (stickers)Question 58 ChemistryWho created the plum-pudding model of atomic structure?Answer - Q58ThomsonQuestion 59 MathSiddarth paid for a $1 burger with 32 coins and received no change. Each coin was either a penny or a nickel. What was the number of nickels Siddarth used? Answer - Q5917 (nickels) Question 60 ChemistryWhat adjective is used to describe any chemical substance that can behave in both acidic and basic manners?Answer - Q60AmphotericQuestion 61 MathWhat is the area of a square with diagonal length 18?Answer - Q61162 (units squared)Question 62 PhysicsA net force of 119 Newtons acts on a box with a mass of 34 kg. What is the box's acceleration?Answer - Q623.5 m/s^2Question 63 MathWhat is the term for a limit that a function approaches as either x or y (or both, perhaps) approach infinity?

Answer - Q63AsymptoteQuestion 64 BiologyWhat is the name for the insulating materials that surrounds the axons of brain cells?Answer - Q64MyelinQuestion 65 MathWhat is the next term in the following sequence?

2, 3, 5, 7, 11, 13, 17, 19

Answer - Q6523Question 66 - ChemistryWhat scientist is known for describing the Equilibrium Law which predicts how a system in equilibrium will react to external changes?Answer - Q66Le ChatelierQuestion 67 MathWhat is the largest prime divisor of 712?Answer - Q6789Question 68 ChemistryIf 10 moles of Fe2O3 are produced from the exact amounts of O2 and Fe , what is the mole fraction of O2 in the reaction mixture before the reaction? Answer - Q683/7Question 69 MathIn a spelling bee, 50% of the students were eliminated after the first round. Only of the remaining students were still in the contest after the second round. If 24 students were still in the contest after the second round, how many students began the contest? Answer - Q69144 (students)Question 70 BiologyOne of the more common species of sabertooth tigers is of the kingdom Animalia, phylum Chordata, class Mammalia, order Carnivora, family Felidae, species Fatalis, genus Smilodon. What is its scientific name?Answer - Q70Smilodon fatalisQuestion 71 MathWhat is the smallest positive integer with factors of 15, 16, and 12? Answer - Q71240Question 72 PhysicsWho developed the theory of relativity?Answer - Q72Albert EinsteinQuestion 73 MathPoint A has coordinates (x, 6). When Point A is reflected over the y-axis it lands on Point B. What is the sum of the four coordinate values of points A and B?Answer - Q7312Question 74 PhysicsWhat was the name of the astronomical phenomenon that becomes visible on Earth every 75-76 years, named after a famous 17th and 18th century scientist?Answer - Q74Halleys CometQuestion 75 MathAni has a certain number of oranges. If he divided them amongst 3, or 4 people, he would have 2 left. However, when he divides them amongst 5 people, he can divide them evenly. What is the smallest number of oranges he can have?Answer - Q7550 (oranges)Question 76 BiologyAbout 54.3% of blood is made up of what pale-yellow liquid?Answer - Q76PlasmaQuestion 77 MathIf there are 20 Swags in 3 Yolos and 12 Blaze-its per 18 Yolos, how many Swags are there in 42 Blaze-its?Answer - Q77420 (swags)Question 78 ChemistryLimestone is mostly composed of which chemical?Answer - Q78Calcium Carbonate (CaCO3)Question 79 MathHow many distinct 5-letter arrangements can be made from the letters in the word APPLE (not including APPLE itself)Answer - Q7959 (arrangements)Question 80 ChemistryWhat is the name for the ion C2O42-?Answer - Q80OxalateQuestion 81 MathWhat is the name for a number with an odd number of 1s in its binary expansion?Answer - Q81OdiousQuestion 82 BiologyWhat type of plant literally means naked seed in Greek?Answer - Q82GymnospermQuestion 83 MathKarthik wrote the digits from 1-104, inclusive. How many digits did he write? Answer - Q83204 (digits)Question 84 PhysicsWhat is the name of the mathematical relation of the index of refraction of a medium to angle at which refrated light enters the medium?Answer - Q84Snells LawQuestion 85 MathWhat is the sum of the inverse of the squares of the natural numbers from one to infinity?Answer Q85Pi squared over 6