Questions Asked on
May 31, 2013

Chemistry
What is the halflife of sodium24? Explain how you determined your answer. Sodium24 decays by beta emission. Write a nuclear equation that shows the decay of sodium24 and its products.
asked by Help plz....Chloe 
Statistic
At one college, GPA's are normally distributed with a mean of 2.7 and a standard deviation of 0.5. What percentage of students at the college have a GPA between 2.2 and 3.2?
asked by Irene 
math HELP
The probability of a basketball player hitting a foul shot is onethird. How many shots would you expect her to make in 90 attempts?
asked by bilbo 
pharmacy technician
2% testosterone qs ad petroleum jelly 240g. How many ml of testosterone is needed to make this compound?
asked by Debra 
chemistry
Sulfuryl chloride, SO2Cl2, decomposes to SO2 and Cl2 according to the reaction SO2Cl2(g) > SO2(g) + Cl2(g) The reaction is first order in SO2Cl2, and the value of the rate constant, k, is 2.20*105 /s at 300K. (a) Calculate the intial rate of reaction
asked by ssss 
math
What is the excluded value of a/b2
asked by Anonymous 
ScienceChemistry
1. What is Charles’s law? • State the definition of the law in words. • What are the assumptions of Charles’s law? • Write mathematical equations that represent the law. • What can you do with Charles’s law? • Using a gasfilled balloon as
asked by Help needed.... Danielle 
language arts help please
1. Which of the following is an example of an acronym? FAQ Mrs. Ave. won't 2. The original meaning of the word awesome is "inspiring great admiration or fear." Which of the following is the best synonym of the word s it is used most commonly today? great
asked by Delilah 
Chemistry
Sodium Azide, (NaN3), the conjugate base of hydrazoic acid, is sometimes added to water to kill bacteria. Given a 0.010 M solution of sodium azide, A) What is the [H+] concentration from the Azide base rxn? B) Given a 0.01 M NH4+, what is the [H+]? C) What
asked by Lovey dovey 
chemistry
Help plzzz Besides the major types of radioactive decay, there are two others: positron emission and electron capture. • Compare and contrast positrons with electrons. • Explain how positron emission works and how it causes transmutations. • Explain
asked by Help!!! Maddie 
math
The amount to which $5,000 would grow in ten years at 6% compounded semiannually.
asked by Lilly 
Literature
How does Kurt Vonnegut address the concept of equality differently in “Harrison Bergeron” than Martin Luther King Jr. does in “Letter from Birmingham Jail”? What relationship does Vonnegut’s story show between equality and personal
asked by Charlie 
physical education
What nutritional supplement is recommended for helping the body handle stress? A. Zinc B. Iron C. Vitamin C D. No supplements are recommended for stress management I think its a but im not sue please help
asked by selena 
Math
Sixty men working on a construction job have done 1/3 of the work in 18 days. The project is behind schedule and must be accomplished in the next twelve days. How many more workers need to be hired?
asked by Shin 
Chemistry
Hi, I am stuck on this question and would appreciate some guidance. The question states " The value of Kw decreases as the temperature decreases. Is the autoionization of water an exothermic or endothermic reaction in the forward direction?" I feel like
asked by Charlotte 
Physics
Which of the following is the correct relationship between the electric field strength and the potential difference?
asked by tanya 
chemistry
The skeletal structures of the two amino acids, glycine and lysine, are given below along with the values of the relevant acid dissociation constants (pKa). (b) Calculate the pI (isoelectric point) of the dipeptide, LysGly, assuming that there is
asked by bonjo 
American history
Which of the following best describes the columbian exchange that occurred during the age of discovery
asked by Annette 
Chemistry
Calculate the pI (isoelectric point) of the dipeptide, LysGly, assuming that there is negligible shift in the values of acid dissociation constants from the values of the constituent amino acids. Gly pkA 9.87 an pka 2.35; Lys pka 9.18, 2.16 y 10.79
asked by guegue 
Physics
when a wire of length 5m & radius 0.5mm is stretched by a load of 49N the elongation produced in the wire is 0.1cm find the energy stored per unit volume of the wire?
asked by Sonal 
PHL458
Don't really understand what the teacher want. Can you help me get a better understanding. Evaluating and Refining Resolutions Presentation (Preparation) Search for societal issues and pick one issue you would like to resolve. Obtain faculty approval of
asked by cathy 
Physics
Which of the following is correct for a stepdown transformer?
asked by april 
Algebra 1
1) Find the possible values of a, if the distance between the points is 5, and the coordinates are (1, 1) and (4, a). I don't know how to solve this one. 2) in a right triangle the length of the hypotenuse is 14 and the length b of one of the legs is 8.
asked by Eri 
math
You have two job offers on the table. The first job you will earn a weekly salary of $14 per hour. The second job offers you $7 per hour plus 30% commission. Explain how you would decide which job to take. What would be the deciding factor? Explain to your
asked by Santina 
maths
an elevator descends at the rate of 8m/min.if the descent starts from 5m above the ground level,how much time will it take to reach 475m ?
asked by kundavai.u 
Chemistry
Describe the subatomic structure of the nucleus, including the structure of each nucleon. Describe the forces that hold the nucleus together Explain how beta emission works.
asked by Maria 
physics
a trailer is pulling acar with a force of 900N on a level road. The car is moving at 70km/h, how much work is done by the trailer on the car in 15mm?
asked by taiwo 
Calculus
Evaluate the following limit, if it exists: lim h>0 ((sqrt9+h)3/(h)
asked by Tyler 
math
15. You are the buyer for The Shoe Outlet. You are looking for a line of men’s shoes to retail for $79.95. If your objective is a 55% markup based on selling price, what is the most that you can pay for the shoes and still get the desired markup
asked by kim 
Calculus
If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, its height in feet after t seconds is given by f(t)=95t−16t^2 Find the average velocity for the time period beginning when t=1 and lasting (i) 0.5 seconds (ii) 0.1 seconds
asked by Abby 
Physics
Which of the following is correct for the two coherent light waves to produce zero light?
asked by Janet 
algebra
You are shopping for an executive desk chair at The Furniture Gallery. You see two you like on sale. Chair A was originally $119.99 now on sale for $79.99 and Chair B was originally $149.99 now on sale for $89.99. Calculate the markdown percent of each
asked by trish 
math
A. Wyatt’s Western Wear purchases shirts for $47.50 each. A $34.00 markup is added to the shirts. What is the selling price? B.What is the percent markup based on cost for the shirts in the previous question? (Round percent to the nearest tenth.)
asked by TISHA 
math
A. . Epicure Market prepares fresh gourmet entrees each day. On Wednesday, 80 baked chicken dinners were made at a cost of $3.50 each. A 10% spoilage rate is anticipated. At what price should the dinners be sold to achieve a 60% markup based on selling
asked by Lamar 
physics
A rock is suspended by a light string. When the rock is in air, the tension in the string is 43.8 . When the rock is totally immersed in water, the tension is 26.2 . When the rock is totally immersed in an unknown liquid, the tension is 18.8 .
asked by lungani 
Maths
Prove that (2n)!/n!=1x3x5.........(21)x2n.
asked by Sonal 
chemisrty
The NN bond energy is difficult to measure. Given the values of 190 kJ/mol for the NCl bond energy and 240 kJ/mol for the ClCl bond energy, determine the maximum de Broglie wavelength of an electron capable of breaking the NN bond.
asked by Anonymous 
English
Which is the better strategy for reading comprehension?
asked by Lulu 
physics
A large truck (m=3300kg) accelerates from 15 m/s. Neglecting any friction or air resistance, find the average mechanical power that the trucks engine must supply.
asked by Stacy 
Calculus
If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, its height in feet after t seconds is given by f(t)=95t−16t^2 Find the average velocity for the time period beginning when t=1 and lasting (i) 0.5 seconds (ii) 0.1 seconds
asked by Robin 
chemistry
Calculate the surface energy of the (100) plane of niobium. The heat of atomization is 745 kJ/mol. Express your answer in J/cm2.
asked by Anonymous 
Discrete Math
True or False? Homogeneous linear recurrence equations are linear combinations of power functions. I think the answer is false because although a homogeneous linear recurrence equation is a linear combination, it is composed of constant coefficients.
asked by Sarah 
chemistry
the skeletal structures of two amino acids.
asked by himani. 
math
Tickets to a show cost $10 for adults and $5 for children. The show was sold out, and the theatre has 500 seats. If the revenue collected from these ticket sales was $2900, how many adult tickets were sold?
asked by ray 
MIT 2.01x
The thin wall shaft is fixed at and loaded by concentrated torques at sections and of direction and magnitude indicated in the figure. The shaft is composed of three segments, and of equal lengths m, and diameters indicated in the figure. The three
asked by Anonymous 
Phyics please help ms sue
A 9 v battery is connected across a series combination of 100 W, 35 W, and 55 W resistors. The current measured in the circuit is 100 mA. What can be wrong in this circuit?
asked by Anonymous 
Vectors
A 10kg mass is suspended by two strings of length 5m and 7m attached to two points in the ceiling 10 m apart. Determine the tension on each string. Round your result to one decimal place (include a vector and position diagrams)
asked by samantha 
statistics
The lifetime of a 2volt nonrechargeable battery in constant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than
asked by Anonymous 
chemistry
I want to replace 5g per liter of nah2po4 .h2o with h3po4 at 85%. the liquid is 1.685 g/ml
asked by sue 
math
The Flour Power Bakery makes 200 cherry cheesecakes at a cost of $2.45 each. If a spoilage rate of 5% is anticipated, at what price should the cakes be sold to achieve a 40% markup based on cost?
asked by brenda 
MIT2.01x
We will use moment equilibrium around the x axis to calculate the xcomponent of the reaction torque at and the axial torque resultant at section , for these two shafts in torsion.
asked by Anonymous 
physics Elena please verify
If the resistance between the center and the outer terminal on a 20 k ohm potentiometer reads 12 k ohms, the resistance between the center terminal and the other outer terminal is i have 12kohms
asked by Adam 
chemistry
For each pair of substances listed below, identify the one with the lower boiling point. (a) Silane (SiH4) and Phosphine (PH3) answer = silane (b) Ammonia (NH3) and Phosphine (PH3) answer = phosphine (c) Lithium fluoride (LiF) and Hydrogen Fluoride (HF)
asked by barco 
Physics
A tunable capacitor (with variable capacitance) is charged by a U0=12 V battery and then is connected in parallel to a R=3 Ω resistor. The capacitance C(t) of the capacitor is controlled so that the current in the circuit remains constant at all times.
asked by Mathslover 
Calculus
Find all first partial derivatives: f(x,y)=e^(xy)cosx
asked by Elyse 
math
A. You are shopping for an executive desk chair at The Furniture Gallery. You see two you like on sale. Chair A was originally $119.99 now on sale for $79.99 and Chair B was originally $149.99 now on sale for $89.99. Calculate the markdown percent of each
asked by Lamar 
chemistry
what kind of hybridization exists for each carbon in the lattice?
asked by himani. 
math
A poll of 100 students was taken at a noresidential college to find out how they got to campus. The results were as follows: 28 said car pools;31 said buses;and 42 said they drove to school in their own car alone. In addition, 9 used both car pools and
asked by ray 
SAT math
I've really been stuck on these questions: 1. If ( x + 2 y )= 4 and am = 6, then 2amx + 4amy = ____ ? 2. The integers x and y are such that x > y > 0 and x 2  y 2 = 31. If x – y = 1, what is the value of x + y ? 3. What is the value of a that will make
asked by mysterychicken 
chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2
asked by Anonymous 
physics please need help
If the period of an AC sine wave is 180 ms, the frequency is
asked by Adam 
SAT math
1. Find the product of the solutions of this equation: 1 / x+1  6x/6x = 0 2. If y is jointly proportional to x and z and y = 4 when x = 8 and z = 1, what is the value of y when x = 24 and z = 3? For this one I think I'm solving it wrong, because I keep
asked by mysterychicken 
Chemistry
What is the volume of a sample of helium that has a mass of 5.13x10^3 and a density of 0.17847g/L
asked by Addie 
english literature
How does The Misfit embody both verses of Matthew 12:35? "A good man from the goodness of his good heart brings forth good things; an evil man from the evilness of his evil heart brings forth evil deeds."
asked by joanna 
Math
Can someone help me with this I figured out a similar problem P(x) = xsquare+5 over 50 for x = 1 got 0.12 But having problems on how to plug the numbers into this problem. you don't have to use these numbers but if someone could do an example for me I
asked by Nora 5 
Aviation
Does the engine of a Cessna 162 have an alternate air source? How many fuel pumps does the Cessna 162 have? Your help is very much appreciated!
asked by Heather 
Physics
Can anyone write a mathematical equation to represent Charles law?
asked by Schylar 
heeeeeeeelp math
Let x,y,z be nonnegative real numbers satisfying the condition x+y+z=1 . The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b ?
asked by andrew 
physics
an electron with velocity v=3x10 to the power 7 m/s describes a circular path in a uniform magnetic field of 0.2T perpendicular to it calculate the radius of the path?
asked by Sonal 
physics
describe with the aid of a fully labelled diagram the features and their uses of a bicycle pump
asked by Tanaka Mufuvi 
Maths
prove that the equation of straight line which passes through the point (a cos^3a, sin^3a) & is perpendicular to the straight line x sec a+y cosec a=0 is x cos ay sin a = a cos 2a.
asked by Sonal 
Chemistry
entropy is not a good criteria for determining the spontanecity of a process.give reason.
asked by Sonal 
chemistry
sulfuryl cholorie decomposes toSo2 and cl2
asked by himani. 
chemistry
calculate surface energy of 100 plane of niobium.
asked by himani. 
chemistry
a pressure vessel contains a large volume of cn2 gas at 10atm pressure.
asked by himani. 
chemistry
you have 333 ml of alkaline solution at pH=11.1
asked by himani. 
math
The mean attendance of spectators at ball games is 120, the median is 125...what is the total attendance in 20 games?
asked by Debbie 
Chemistry
What is the approximate ratio in conductivity of silicon doped with 37 ppm to silicon doped with 5 ppm?
asked by zzzz 
Calculus
A helium balloon rises vertically at 3.5m/s as the wind carries it horizontally at 5.0m/s. What is the resultant velocity of the balloon?
asked by Alice 
math
If a  b , a , a + b are zeros of polynomial x33x2 + x + 1 the value of(a+b) is:
asked by sapna 
Chemistry
What chemical feature in the protein dictates the local secondary structure? αhelix βpleated sheet random coils amino acid sequence pH hydrogen bonding
asked by jo 
math
how do I set up this problem. John has bag of candy, gives 1/2 to his brother and 1/3 of remaining to his sister and has 15 left? how many did he start with?
asked by george 
Mathematics Ms Sue help
A high pass filter with a cutoff frequency of 250 kHz is placed in a circuit after a low pass filter with a cutoff frequency of 150 kHz. Together, these filters create which type of filter?
asked by Adam 
Chemistry
I don't understand this question, thanks to whoever tries to help!! (This homework question was removed due to a copyright claim submitted by k12.com.)
asked by So confusing.. Anyone help??? Kylie 
Law
__________ is an act declared by statute to be a crime because it violates the standards of behavior expected of children. A. Delinquency B. Vandalism C. Violating curfew D. A status offense is it A
asked by Amy 
Math (Please help ASAP?)
I have this weird question that has to do with linear equations (I think), and this is what it says. Let f(x) = 4x  5 A. Find f(3) B. Find x when f(x) = 21 Can somebody help me understand this??
asked by Alan 
SAT math
1. x^2 + 4x + 1 = 0 has how many solutions? 2? 2. What is the greatest common factor of the polynomial 8y + 2x^3 y^2  2y^3? 2y? 3. The product of powers rule states that for any number a, and integers q and p, (a^q)(a^p)=a^q+p True 4. True or False: The
asked by mysterychicken 
physics
the speed of 90 hm/hr is equal to.... m/s
asked by arowosafe 
physics
the speed of 90 hm/hr is equal to.... m/s
asked by arowosafe 
SAT math
1. True or False: The y intercept of the linear equation x – y = 4 is (0, 4). False?...I think its 4 2. If 10 a > 17, then 30 a + 2 > ____ ? 53? 3. Which of the points below will satisfy the given system of inequalities? 2y>2 and 15x
asked by mysterychicken 
math
looking for the pattern in these sequences: 2,0,1,4,4,8,_ , _ , _, _, and so forth
asked by ray 
math
A graph is given with the line going from (2, 2) to (2,8). a) Find the length of this line. b) Find the midpoint of the line. c) write an equation for this line. my answers a) 2√10 b) 0,5 c) y = 1.5x + 5 please check these answers.
asked by Anonymous 
chemistry
You have 333 mL of alkaline solution at pH = 11.1. You wish to neutralize this by reacting it with 222 mL of acid. What must be the value of the pH of the acid?
asked by barco 
Math
A house mouse has a mass of 12 grams. If you put a mouse on a scale, how many paper clips would be needed to balance it if a paper clip has a mass of 12 grams?
asked by Anonymous 
language arts
1. Where should you put one or more hyphens in the following sentence? The cake was freshly baked and was an irresistible temptation for my four year old cousin. between "freshly" and "baked" between "irresistible" and "temptation" between "four" and
asked by Delilah 
Biology
How does the structure of Earth’s interior affect seismic waves?
asked by ale 
Calculus
If 2x2¡Üf(x)¡Üx^22x+2, determine limx>2f(x)= (Use squeeze theorem)
asked by Penny 
english
“I always wear my lucky hat when the Atlanta Braves play; thanks to me, they won the World Series!” This is an example of (Points : 1)
asked by Anonymous 
Chemistry
Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you
asked by K 
Chemistry
Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you
asked by K 
PHL458
Please!!!! He really confuse me now. Your project is approved. Submit it informally to the Assignments forum ('informally' means with a Cover page and then a request with the statement of the topic.
asked by cathy 
English
what does it mean to follow in someones footsteps exceedingly?
asked by katie 
chemistry
a comparision of density value bx xray reveals that % of Al are 0.07% at 923 K and 0.009% at 757 K
asked by himani. 
Citing
In Chicago, when you are citing two things from the same source how do you cite it?
asked by emma 
physical education
is too much exersise and sports training without any rest good for health?
asked by kundavai.u 
language
what is for thankyou in korean
asked by kundavai.u 
art
According to the lesson, most African art was created for all of these purposes EXCEPT:
asked by Anonymous 
chemistry
a pressure vessel
asked by himani. 
math
looking for the pattern in these sequences: 2,1,4,1,4,9,14,27,_,_,_,_
asked by ray 
chemistry
for each pair of substance listed below identify one with lower boiling point
asked by himani. 
chemistry
for each pair of structure shown below indicate two species are identical molecules.
asked by himani. 
chemistry
diffraction from an unknown cubic metal is observed to occur at following value using cu radiation.
asked by himani. 
english
I think that rainy days are just awful, is this suitable to form the basis of a single persuasive paragraph.
asked by michael 
Geometry
given 18 feet of fencing what is the largest area that you can enclose with the fencing.
asked by Tahirah 
Geometry
given 18 feet of fencing what is the largest area that you can enclose with the fencing.
asked by Tahirah 
SCI/220 HUMAN NUTRITION
I would like a thesis, and a general answer to the questions
asked by Fertina 
english
Im doing a 8 paragraph project report on cherokee indians, i need a introduction, final draft, six body paragraphs and a conclusion for a total 8 paragraphs please help me it due the 12
asked by jesse 
Finance
What does "loan amortization requirements" mean?
asked by K 
SAT math
True or False: The least common denominator of each denominator in the following rational expression is 2(x3)(x1) : 8 / x^24x+3 = 1 / 3x + 1 / 2 FALSE? True or False: The least common denominator of each denominator in the following rational
asked by mysterychicken 
SAT math
1. If square root of 3x11 +10 = 17, find the value of 10 x . I don't know how to solve with square roots. I subtracted 10 from both sides, so I'm left with square root of 3x11 = 7...How do I solve for x?
asked by mysterychicken 
Math Linear function help?
How do you write an equation of a line in slope intercept form if two points are given? Ex. Say you were given the points (0,6) and (4,3)? What would you do?
asked by Lily 
geometry
how to solve angle D is 90 degrees and angle E is 25 degrees side DE is 8 cm and side DF is 6 cm what is side ED
asked by carlos 
More math linear equation help?
I'm looking at this graph where I see a line AB with the points (2,2) and (2,8). Then I have to do the following: a) Find the length of AB b) Find the midpoint of AB c) Write an equation for the line going through AB I don't understand how to do part a
asked by Lily 
physics please need help
A parallel RL circuit has a reactance of 250 W and a resistance of 125 W. The phase angle of the circuit impedance is
asked by Adam 
Phyics help please varify the answer is correct
A parallel circuit has value of RT = R1 // R2 // R3. If one resistor opens, RT RT increases?
asked by Adam 
math
___% of 3.75 =2
asked by larry 
Law
1. Many social scientists argue in favor of diversion programs because: A. they are sociologically effective, even though they do not reduce court backlog. B. they increase the costs of criminal processing, but are worth it in the long run. C. although the
asked by Amy 
math linear equations
would the equation in slopeintercept form of the line which passes through 0,6 and 4,3 be y = 3/4x + 6?
asked by Anonymous 
SAT Math
True or False: The least common denominator of each denominator in the following rational expression is (z4)(z+4)(z1)(z+1): 8 / z^2+5z+4 = 1 / z4 + 1 / z1 I am stuck on this one...
asked by mysterychicken