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    Rate Law Homework Problem

    Homework Statement Cerium and thallium ions react as follows: 2Ce4+ (aq) + Tl+ (aq) ---> 2Ce3+ (aq) + Tl3+ (aq) This reaction is very slow and is thought to occur in a single elementary step. The reaction is catalyzed by the addition of Mn2+(aq) according to the following mechanism...
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    DNA Sequencing hwk problem

    Homework Statement A DNA strand with the sequence 3' GTGAACTGC 5' is complementary to the sequence Choose one answer. a. 5' GTGAACTGC 3' b. 3' GACGTTACA 5' c. 3' GCAGTTCAC 5' d. 5' GCACTTCAC 3' . Homework Equations 3' GTGAACTGC 5' 5' CACTTGACG 3' The...
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    Recombination Freq.: Genetic Mapping Hwk Problem

    Homework Statement The recombination frequency between gene “Q” and gene “Z” is found to be 23.5%. The recombination frequency between “Q” and a third gene “R” is 10%. The frequency of recombination between “Z” and “R” is 13.5%. Which one of the following is NOT true concerning these three...
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    DNA base pairing calculation

    Homework Statement If a double-stranded segment of DNA has been found to have 23 purines and 15 thymines, how many guanines are there? Homework Equations purines are adenine and guanine...adenine and thymine should be equal amounts. So, there are 15 adenines. Out of the 23 purines...
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    Biology Genetics: DNA & mRNA sequencing

    Homework Statement A portion of DNA has the sequence 3' TTGACGC 5'. The sequence of RNA that is transcribed from this sequence is Choose one answer. a. 3' UUCAGCG 5' b. 5' AACUGCG 3' c. 5' AACTGCG 3' d. 5' GCGUCAA 3' Homework Equations 3' TTGACGC 5' 5'...
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    Homework on ribosomes help

    Homework Statement The process of transcription Choose one answer. a. takes place on ribosomes. b. occurs only in eukaryotic cells. c. can only produce messenger RNA molecules. d. builds an RNA strand in the 5' to 3' direction. Homework Equations...
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    Biology Genetics: Mapping and Recombinant Frequency

    Homework Statement Two homozygous plants are crossed and all offspring (F1) are yellow with long stems. A cross of the offspring (F1)produces the following phenotypes in the F2 generation: 1,263 yellow, long stem 1,196 white, short stem 205 yellow, short stem 195 white, long stem...
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    Biology Genetics polygenic inheritance & probability

    1. Homework Statement Height is a characteristic resulting from polygenic inheritance. If genes at four loci code for height, what is the probability that parents with the genotypes RrSSTtUu and RrSsTtUU will have a child possessing 8 tall alleles? Choose one answer. a. 1/128 b...
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    Biology Genetics: Colorblindness and Blood Type

    1. Homework Statement A colorblind man with blood type AB marries a woman with normal vision and blood type A who is heterozygous for both traits. What are the odds of having a daughter that is colorblind and has blood type A? 2. Homework Equations Xc Y IA IB x XC Xc IA i 3...
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    Biology Genetics Hwk Problem

    [b]1. Homework Statement Crossing an individual who is homozygous dominant for a trait with an individual whose genotype is unknown will most likely produce which set of offspring? [b]2. Homework Equations DD x ? DD x Dd DD x DD DD x dd [b]3. The Attempt at a Solution...
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    Biology Genetics dihybrid cross

    [b]1. Homework Statement In an organism, two separate genes influence the length of the hair. The allele for long hair, L, dominates the allele for short hair, l. The allele for hair, H, dominates the hairless allele, h. In the cross between parents of genotype LlHh and llHh, what ratio of...
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    Question about Krebs Cycle

    Homework Statement What is the total yield of ATP in the Krebs cycle for each glucose molecule that enters glycolysis? Homework Equations The Attempt at a Solution Not sure if the correct answer is 2 ATP or 24 ATP due to 6 NADH (= 18 ATP) oxidative phosphorylation 2 FADH2 (= 4...
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    Biology Homework Question

    Homework Statement In general when comparing two molecules, Choose one answer. a. the more stable molecule can produce more ATP. b. the less stable molecule has less energy. c. the more stable molecule is larger. d. the less stable molecule is more likely to react. Homework...
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    Biology Homework Question

    Homework Statement Consider the following events: 1) The protein has sugar added to become a glycoprotein. 2) The protein is in the plasma membrane with the sugar modification facing outside the cell. 3) A membrane protein is synthesized in the rough endoplasmic reticulum. 4)...
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    Chemistry Homework: Calculate Enthalpy Change

    1. Calculate the approximate enthalpy change for the combustion of methane: CH4 + 2O2 ---> 2H20 + CO2 2. Homework Equations CH4 + 2O2 ---> 2H20 + CO2 enthalpy= D(reactants) - D(products) D= bond dissociation energies Bond Dissociation energy (KJ/MOL) C-C 350 C=C...
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    What is the kinetic energy in joules of a 950-lb motorcycle moving

    1. Homework Statement 1. What is the kinetic energy in joules of a 950-lb motorcycle moving at 50 mph ? 2. If the speed of the motorcycle changes from 50 mph (with kintic energy K1) to 25 mph (with kinetic energy K2), what is the ratio of K1 to K2? 2. Homework Equations KE=1/2mv2...
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    Thermochemistry Homework Problem

    Homework Statement 1. What is the kinetic energy in joules of a 950-lb motorcycle moving at 50 mph ? 2. If the speed of the motorcycle changes from 50 mph (with kintic energy K1) to 25 mph (with kinetic energy K2), what is the ratio of K1 to K2? Homework Equations 1. KE=1/2mv2...
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    Prime Factorization Problem 4

    Homework Statement You bring the drinks for your soccer team every sixth game. Every third game is a home game. How many times will you bring the drinks to a home game if you have a 20 game season? Homework Equations i did the problem in my head, but I need to show my work to get the...
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    Prime Factorization Homework Problem 3

    Homework Statement In one part of a musical composition, the triangle player in an orchestra plays once every 12 beats. The tympani player plays once every 42 beats. How often do they play together? Homework Equations don't have any The Attempt at a Solution Insufficient...
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    Prime Factorization Homework Problem 2

    Homework Statement Presidential elections are held every four years. Senators are elected every 6 years. If a senator was elected in the presidential election year of 2000, in what year would he or she campaign again during a presidential election year? Homework Equations dont know...
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    Prime Factorization Homework Problem 1

    Homework Statement Margo has piano lessons every two weeks. Her brother Roberto has a soccer tournament every three weeks. Her sister Randa has an orthodontist appointment every four weeks. If they all have activities this Friday, how long will it be before all of their activities fall on...
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    Re: Microbiology Hwk Problem, Calculating generation time

    Calculate the time it will take to increase the cell number from 10^4 CFU/ml to 10^8 CFU/ml assuming a generation time of 1.5 hr. 2=e^ut where t is the generation time...solve for u. x=xo*e^ut where t is time For the 1st equation: ln2=lne(ut) ln2/t=u ln2/1.5=u u=0.46 l/hr For...
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    Pre Calculus Homework Problem Help!

    [SOLVED] Pre Calculus Homework Problem...Help! [b]1. Homework Statement A quadrilateral has two pairs of congruent sides and a longer diagonal of length of 6, as shown. For what value of x will the area of the shaded region be 40% of the area of the unshaded region? [b]2. Homework...
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    Re: Polarization with three 45 degree polarizers

    Can someone explain to me what occurs in the Polarization with three 45 degree polarizers?
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    Verifying the Law of Malus

    From plotting a graph of Intensity vs. relative angle, there was a linear relationship. From this graph in Graphical Analysis, we obtained a slope (m) and a y-intercept (b). We then have to look at the original expression for the Law of Malus. My question is: What physical parameters do the...
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    Hwk Problem about Convex Mirrors

    An object that is 31 cm in front of a convex mirror has an image located 20 cm behind the mirror. How far behind the mirror is the image located when the object is 19 cm in front of the mirror? For this problem, I know I have to use the mirror equation but I keep getting the wrong...
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    Physics Hwk Problem on Convex Mirrors

    Convex mirrors are being used to monitor the aisles in a store. The mirrors have a radius of curvature of 4 m. What is the image distance if a customer is 20 m in front of the mirror? From using the mirror equation, i came up with an answer of 1.82m but when i submitted it for webassign, it...
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    Energy and Simple Harmonic Motion

    In preparation for shooting a ball in a pinball machine, a spring (k = 675 N/m) is compressed by 0.0690 m relative to its unstrained length. The ball (m = 0.0540 kg) is at rest against the spring at point A. When the spring is released, the ball slides (without rolling) to point B, which is...
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    Trouble with Simple Harmonic Motion

    I am having trouble with this question: 1. A particle oscillating in simple harmonic motion is: in equilibrium at the center of its path because the acceleration is zero there or in equilibrium at the ends of its path because the acceleration is zero there 2. When a body...
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    Help: Physics Homework Problem-Conservation of Linear Momentum

    Two friends, Al and Jo, have a combined mass of 168 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart because they are holding each other. When they release their arms...
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